technical information document - british gypsum

HMRC6 Central Square

Cardiff

12th October 2018

Graham Lloyd - Tel. 07786 337414

Project Specification Manager

601328-PA-001B

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Contents

Specification■ NBS Guidance

■ NBS K10

U-value Calculation

Project Details■ L2B

■ L2C, L2D & L2K

■ L2E

■ L2F

■ L2G

■ B1B & B1C

■ P1A

■ P2C

■ P2D

■ P2E

■ P2F

■ P2G

■ CL02

■ CL03

Typical Details■ Miscellaneous

Specification

NBS K10

British Gypsum Head Office • East Leake • Loughborough • Leicestershire • LE12 6HX • Tel +44 (0) 115 945 1000 • Fax +44 (0) 115 945 1901 • www.british-gypsum.com

Proprietor: BPB United Kingdom Limited registered in England 734396, registered office Saint-Gobain House, Binley Business Park, Coventry, CV3 2TT, UK A Saint-Gobain Company

Guidance Notes for NBS Specifications The attached NBS specifications are based on available information at the time of the customer enquiry. Some sections may not be relevant to the project and will need deleting, or are incomplete and will require the specifier to enter relevant project information. The following points should be noted with regard to fire resistance, sound insulation and maximum height: The performance figures entered in the attached NBS specifications are generally that achieved by the relevant British Gypsum system. In most cases figures will reflect the performance published in British Gypsum's current literature. Where the system performance stated in these clauses exceeds the projects requirements, or may not be applicable, the specifier may wish to amend the figures to indicate the exact project requirements.

K10

British Gypsum 12 October 2018 Page 1 601328-SP-001B

K10 PLASTERBOARD DRY LININGS/PARTITIONS/CEILINGS To be read with Preliminaries/General conditions. TYPE(S) OF DRY LINING 121A WALL LINING ON METAL FRAMING – L1A: Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX

Website: www.british-gypsum.com, Tel: 0115 945 6123,E-Mail: [email protected]. British Gypsum contact: Graham Lloyd Tel 07786 337414, email [email protected]

Product reference: GypLyner UNIVERSAL. - Background: 250mm concrete. - Performance criteria: Sound insulation: N/A. - Stand off (background to face of channel): Nominal 61mm (overall lining thickness 100mm). - Framing: Grid: Gypframe GL1 lining channels at 400mm centres. Channel connectors: Gypframe GL3. Brackets: Gypframe GL2 (max. 75mm) at 600mm maximum centres. Floor/ceiling track: Gypframe GL8. - Installation: As clause 481A. - Cavity insulation: N/A. Recycled content: N/A. - Lining: One layer 15mm Gyproc WallBoard, sheet width 1200mm. Plus 18mm plywood

and 6mm glass (specified and supplied by others) Fixings: As clause 591A. Screws: 25mm British Gypsum Drywall Screws. Suitable type for plywood. - Thermal sealant: As clause 331A, if required. - Gyproc Sealant: As clause 516A. - Finishing: Taped seamless finish as clause 671A. - Accessories: _________ - Other requirements:

- Plywood must be environmentally conditioned and dimensionally stable before installation. - Ensure weight is transferred to floor. - Please Note: Before altering this specification check with the design team that any proposed changes will not jeopardise the project environmental assessment rating target (BREEAM, CfSH, LEED, etc.)

- Please Note: Before altering an ACTIVair specification check with the design team that any proposed changes will not jeopardise the project's indoor air quality performance or air quality management plan.

- Please always refer to current literature by visiting www.british-gypsum.com

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126A ENCASEMENT ON METAL FRAMING TO STEEL COLUMNS – L2B: Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Structural member(s): Steel Column or Beam (Size: TBC) - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX Website: www.british-gypsum.com, Tel: 0115 945 6123,E-Mail: [email protected]. British Gypsum contact: Graham Lloyd Tel 07786 337414, email [email protected]

Product reference: GypLyner ENCASE. Type: 4 sided boxed casing as clause 491B. - Fire protection of complete encasement assembly to BS 476: Part 21(550oC): N/A. - A/V (Hp/A)m-1 section factor: - Framing system: Gypframe GL1 lining channels, GL3 channel connectors, GA2 angles, and

GL10 framing clips as recommended for the purpose by the board manufacturer. - Lining: One layer 15mm Gyproc WallBoard. Fixing: As clause 591A. Screws: 25mm British Gypsum Drywall Screws. - Cavity insulation: 25mm Isover Acoustic Partition Roll (APR 1200) only in locations

confirmed by SRM. On tenant requirements. - Recycled content: Up to 86%. - Finishing: Taped seamless finish as clause 671A. - Accessories: _________ - Other requirements:

- Not suitable for intumescent painted steel columns or beams. Refer to Sherwin Williams’ information.

- Please Note: Before altering this specification check with the design team that any proposed changes will not jeopardise the project environmental assessment rating target (BREEAM, CfSH, LEED, etc.)



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127A WALL LINING ON METAL FRAMING TO INTERVIEW & SECURITY ROOMS – L2C (1): Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX


Product reference: GypLyner UNIVERSAL. - Background: 140mm blockwork. - Parge coat: Gyproc Soundcoat Plus as clause 326A (where specified on Gensler drawings). - Performance criteria: Sound insulation: Rw 40 dB estimated (based on blockwork performance and a sealed

background). - Stand off (background to face of channel): 50mm. - Framing: Grid: Gypframe GL1 lining channels at 600mm centres. Channel connectors: Gypframe GL3. Brackets: Gypframe GL2 (max. 75mm) at 800mm maximum centres. Floor/ceiling track: Gypframe GL8. - Installation: As clause 481A. - Cavity insulation: n/a. Recycled content: n/a. - Lining: One layer 15mm Gyproc WallBoard, sheet width 1200mm. Fixings: As clause 591A. Screws: 25mm British Gypsum Drywall Screws. - Thermal sealant: As clause 331A, if required. - Gyproc Sealant: As clause 516A. - Finishing: Taped seamless finish as clause 671A. - Accessories: _________ - Other requirements: - Please Note: Before altering this specification check with the design team that any proposed changes will not

jeopardise the project environmental assessment rating target (BREEAM, CfSH, LEED, etc.) - Please Note: Before altering an ACTIVair specification check with the design team that any proposed changes will

not jeopardise the project's indoor air quality performance or air quality management plan. - Please always refer to current literature by visiting www.british-gypsum.com

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127B WALL LINING ON METAL FRAMING – L2C (2): Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX


Product reference: GypLyner UNIVERSAL. - Background: Blockwork. - Performance criteria: Sound insulation: n/a. - Stand off (background to face of channel): 50mm. - Framing: Grid: Gypframe GL1 lining channels at 600mm centres (for splash-backs) or 400mm

centres (where tiling is more than 450mm horizontally). Channel connectors: Gypframe GL3. Brackets: Gypframe GL2 (max. 75mm) at 800mm maximum centres (600mm centres

where GL1 at 400mm centres). Floor/ceiling track: Gypframe GL8. - Installation: As clause 481A. - Cavity insulation: n/a. Recycled content: n/a. - Lining: One layer 15mm Gyproc Moisture Resistant, sheet width 1200mm. Fixings: As clause 591A. Screws: 25mm British Gypsum Drywall Screws. - Thermal sealant: As clause 331A, if required. - Gyproc Sealant: As clause 516A. - Finishing: Taped seamless finish as clause 671A. - Accessories: _________ - Other requirements: - Please Note: Before altering this specification check with the design team that any proposed changes will not



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127C WALL LINING ON METAL FRAMING – L2C (3): Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX


Product reference: GypLyner UNIVERSAL. - Background: Blockwork. - Performance criteria: Sound insulation: n/a. - Stand off (background to face of channel): 50mm. - Framing: Grid: Gypframe GL1 lining channels at 400mm centres. Channel connectors: Gypframe GL3. Brackets: Gypframe GL2 (max. 75mm) at 600mm maximum centres. Floor/ceiling track: Gypframe GL8. - Installation: As clause 481A. - Cavity insulation: n/a. Recycled content: n/a. - Lining: One layer 12.5mm Glasroc H TILEBACKER, sheet width 1200mm. Fixings: As clause 591A. Screws: 25mm British Gypsum Drywall Screws. - Thermal sealant: As clause 331A, if required. - Gyproc Sealant: As clause 516A. - Finishing: Taped seamless finish as clause 671A. Tiled. - Accessories: _________ - Other requirements: - Please Note: Before altering this specification check with the design team that any proposed changes will not



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127D WALL LINING ON METAL FRAMING TO STAIRCORE 1 & 2 – L2C (4): Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX


Product reference: GypLyner UNIVERSAL. - Background: Blockwork. - Performance criteria: Sound insulation: N/A. - Stand off (background to face of channel): 50mm. - Framing: Grid: Gypframe GL1 lining channels at 600mm centres. Channel connectors: Gypframe GL3. Brackets: Gypframe GL2 (max. 75mm) at 800mm maximum centres. Floor/ceiling track: Gypframe GL8. - Installation: As clause 481A. - Cavity insulation: n/a. Recycled content: n/a. - Lining: One layer 15mm Gyproc DuraLine, sheet width 1200mm. Fixings: As clause 591A. Screws: 25mm British Gypsum Drywall Screws. - Thermal sealant: As clause 331A, if required. - Gyproc Sealant: As clause 516A. - Finishing: Taped seamless finish as clause 671A. - Accessories: _________ - Other requirements: - Please Note: Before altering this specification check with the design team that any proposed changes will not



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128A WALL LINING ON METAL FRAMING – L2D (1): Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX


Product reference: GypLyner UNIVERSAL. - Background: Blockwork. - Performance criteria: Sound insulation: N/A. - Stand off (background to face of channel): 85mm. - Framing: Grid: Gypframe GL1 lining channels at 600mm centres. Channel connectors: Gypframe GL3. Brackets: Gypframe GL9 (max. 125mm) at 800mm maximum centres. Floor/ceiling track: Gypframe GL8. - Installation: As clause 481A. - Cavity insulation: n/a. Recycled content: n/a. - Lining: One layer 15mm Gyproc WallBoard, sheet width 1200mm. Fixings: As clause 591A. Screws: 25mm British Gypsum Drywall Screws. - Thermal sealant: As clause 331A, if required. - Gyproc Sealant: As clause 516A. - Finishing: Taped seamless finish as clause 671A. - Accessories: _________ - Other requirements: - Please Note: Before altering this specification check with the design team that any proposed changes will not



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128B WALL LINING ON METAL FRAMING – L2D (2): Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX


Product reference: GypLyner UNIVERSAL. - Background: Blockwork. - Performance criteria: Sound insulation: n/a. - Stand off (background to face of channel): 85mm. - Framing: Grid: Gypframe GL1 lining channels at 600mm centres (for splash-backs) or 400mm

centres (where tiling is more than 450mm horizontally). Channel connectors: Gypframe GL3. Brackets: Gypframe GL9 (max. 125mm) at 800mm maximum centres (600mm centres

where GL1 at 400mm centres). Floor/ceiling track: Gypframe GL8. - Installation: As clause 481A. - Cavity insulation: n/a. Recycled content: n/a. - Lining: One layer 15mm Gyproc Moisture Resistant, sheet width 1200mm. Fixings: As clause 591A. Screws: 25mm British Gypsum Drywall Screws. - Thermal sealant: As clause 331A, if required. - Gyproc Sealant: As clause 516A. - Finishing: Taped seamless finish as clause 671A. - Accessories: _________ - Other requirements: - Please Note: Before altering this specification check with the design team that any proposed changes will not



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128C WALL LINING ON METAL FRAMING – L2D (3): Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX


Product reference: GypLyner UNIVERSAL. - Background: Blockwork. - Performance criteria: Sound insulation: n/a. - Stand off (background to face of channel): 85mm. - Framing: Grid: Gypframe GL1 lining channels at 400mm centres. Channel connectors: Gypframe GL3. Brackets: Gypframe GL9 (max. 125mm) at 600mm maximum centres. Floor/ceiling track: Gypframe GL8. - Installation: As clause 481A. - Cavity insulation: n/a. Recycled content: n/a. - Lining: One layer 12.5mm Glasroc H TILEBACKER, sheet width 1200mm. Fixings: As clause 591A. Screws: 25mm British Gypsum Drywall Screws. - Thermal sealant: As clause 331A, if required. - Gyproc Sealant: As clause 516A. - Finishing: Taped seamless finish as clause 671A. Tiled. - Accessories: _________ - Other requirements: - Please Note: Before altering this specification check with the design team that any proposed changes will not



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129A WALL LINING ON METAL STUDS – L2E: Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX


Product reference: GypLyner IWL. Background: Steel column or other background.

- Performance criteria: Fire resistance (including background) to BS 476: Part 22: n/a. Fire protection to BS 476: Part 21: 1987: n/a. Sound insulation: n/a. Duty Rating to BS 5234: Parts 1 and 2: Medium. - Maximum unbraced height based on limiting deflection of L/240 at 200Pa: 3600mm

(12.5mm board) or 3900mm (15mm board). - Clear cavity width: Min. 10mm. - Timber sole plate: 38mm (nominal) x Gypframe channel width, if required. - Framing: Studs: Gypframe 70 I 70 at 600mm centres and Gypframe 70 S 50 at abutments,

openings and junctions. Floor channel: Gypframe 72 FEC 50 (heights up to 4200mm), Gypframe 72 DC 60 (heights

up to 8000mm), 72 EDC 80 (heights over 8000mm). Head channel: As floor channel or as determined by deflection criteria. Fixing T: Gypframe GFT1 to support horizontal joints of single layer board linings. Fixing strap: Gypframe GFS1 to support horizontal joints in face layer of double layer board

linings, or as an alternative to fixing T for single layer board linings. - Head condition: Suitably fixed up to structural soffit. Deflection allowance: To be determined by a Structural Engineer. - Cavity insulation: n/a. Recycled content: n/a. - Lining: One layer 15mm Gyproc WallBoard or 15mm Gyproc Moisture Resistant or

12.5mm Glasroc H TILEBACKER, sheet width 1200mm. As indicated on layout drawings. Fixings: As clause 591A. Screws: 25mm British Gypsum Jack-Point Screws to I studs and 25mm British

Gypsum Drywall Screws elsewhere. - Thermal sealant: As clause 331A, if required. - Gyproc Sealant: As clause 516A. - Finishing: Taped seamless finish as clause 671A. - Accessories: Gyproc Profilex access panels as clause 531A – if required. - Other requirements:

- Glasroc H TILEBACKER to go full height. - Mid-height support from background to framework required for tiled areas.

- Please Note: Before altering this specification check with the design team that any proposed changes will not jeopardise the project environmental assessment rating target (BREEAM, CfSH, LEED, etc.)



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130A WALL LINING ON METAL FRAMING TO SECURITY ROOM – L2F: Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX


Product reference: GypLyner UNIVERSAL. - Background: 140mm blockwork. - Parge coat: Gyproc Soundcoat Plus as clause 326A. - Performance criteria: Sound insulation: Rw 40 dB estimated (based on blockwork performance and a sealed

background). - Stand off (background to face of channel): 50mm. - Framing: Grid: Gypframe GL1 lining channels at 600mm centres. Channel connectors: Gypframe GL3. Brackets: Gypframe GL2 (max. 75mm) at 800mm maximum centres. Floor/ceiling track: Gypframe GL8. - Installation: As clause 481A. - Cavity insulation: 25mm Isover Acoustic Partition Roll (APR 1200). Recycled content: Up to 86%. - Lining: One layer 12.5mm Gyproc Habito, sheet width 1200mm. Fixings: As clause 591A. Screws: 25mm British Gypsum Drywall Screws. - Thermal sealant: As clause 331A, if required. - Gyproc Sealant: As clause 516A. - Finishing: Taped seamless finish as clause 671A. - Accessories: _________ - Other requirements: - Please Note: Before altering this specification check with the design team that any proposed changes will not



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131A WALL LINING ON METAL STUDS – L2G: Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX


Product reference: GypLyner IWL. Background: Steel column or other background.

- Performance criteria: Fire resistance (including background) to BS 476: Part 22: n/a. Fire protection to BS 476: Part 21: 1987: n/a. Sound insulation: n/a. Duty Rating to BS 5234: Parts 1 and 2: Medium. - Maximum unbraced height based on limiting deflection of L/240 at 200Pa: 5100mm

(12.5mm board) or 5400mm (15mm board). - Clear cavity width: Min. 10mm. - Timber sole plate: 38mm (nominal) x Gypframe channel width, if required. - Framing: Studs: Gypframe 92 I 90 at 600mm centres and Gypframe 92 S 50 at abutments,



linings, or as an alternative to fixing T for single layer board linings. - Head condition: Suitably fixed up to structural soffit. Deflection allowance: To be determined by a Structural Engineer. - Cavity insulation: n/a. Recycled content: n/a. - Lining: One layer 15mm Gyproc WallBoard or 15mm Gyproc Moisture Resistant or

12.5mm Glasroc H TILEBACKER, sheet width 1200mm. As indicated on layout drawings. Fixings: As clause 591A. Screws: 25mm British Gypsum Jack-Point Screws to I studs and 25mm British


- Mid-height support from background to framework required for tiled areas. - Please Note: Before altering this specification check with the design team that any proposed changes will not



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135A WALL LINING ON METAL FRAMING TO SECURITY ROOM – L2K: Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX


Product reference: GypLyner UNIVERSAL. - Background: 140mm blockwork. - Parge coat: Gyproc Soundcoat Plus as clause 326A. - Performance criteria: Sound insulation: Rw 50 dB estimated (based on blockwork performance and a sealed

background). - Stand off (background to face of channel): 50mm. - Framing: Grid: Gypframe GL1 lining channels at 600mm centres. Channel connectors: Gypframe GL3. Brackets: Gypframe GL2 (max. 75mm) at 800mm maximum centres. Floor/ceiling track: Gypframe GL8. - Installation: As clause 481A. - Cavity insulation: 25mm Isover Acoustic Partition Roll (APR 1200). Recycled content: Up to 86%. - Lining: One layer 15mm Gyproc WallBoard, sheet width 1200mm. Fixings: As clause 591A. Screws: 25mm British Gypsum Drywall Screws. - Thermal sealant: As clause 331A, if required. - Gyproc Sealant: As clause 516A. - Finishing: Taped seamless finish as clause 671A. - Accessories: _________ - Other requirements: - Please Note: Before altering this specification check with the design team that any proposed changes will not



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146A WALL LINING ON METAL STUDS TO ACHIEVE 0.35 W/m²K – B1B: Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX


Product reference: GypLyner IWL.

- Background: 140mm medium density blockwork. - Parge coat: Gyproc Soundcoat Plus as clause 326A. - Performance criteria: U-value: 0.35 W/m²K. British Gypsum calculation TCE-14751773-UVMF element 2 Fire resistance (including background) to BS 476: Part 22: n/a. Fire protection to BS 476: Part 21: 1987: n/a. Sound insulation: Rw 35 dB estimated (subject to blockwork performance/mass). Duty Rating to BS 5234: Parts 1 and 2: Medium. - Maximum unbraced height based on limiting deflection of L/240 at 200Pa: 5100mm. - Clear cavity width: 56mm behind insulation (with 15mm board) or 58.5mm behind insulation

(with 12.5mm board). Based on overall wall thickness 330mm. - Timber sole plate: 38mm (nominal) x Gypframe channel width, if required. - Framing: Studs: Gypframe 92 I 90 at 600mm centres and Gypframe 92 S 50 at abutments,



linings, or as an alternative to fixing T for single layer board linings. - Head condition: Suitably fixed up to structural soffit. Deflection allowance: To be determined by a Structural Engineer. - Cavity insulation: 100mm Isover Acoustic Partition Roll (APR 1200) in stud cavity &

25mm Isover Acoustic Partition Roll (APR 1200) behind studs. Recycled content: Up to 86%. - Lining: One layer 15mm Gyproc DuraLine or 15mm Gyproc WallBoard or 15mm

Gyproc Moisture Resistant or 12.5mm Glasroc H TILEBACKER, sheet width 1200mm. As indicated on layout drawings.

Fixings: As clause 591A. Screws: 25mm British Gypsum Jack-Point Screws to I studs and 25mm British


- 0.25mm polythene behind plasterboard. - Please Note: Before altering this specification check with the design team that any proposed changes will not



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147A WALL LINING ON METAL STUDS TO ACHIEVE 0.35 W/m²K – B1C: Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX


Product reference: GypLyner IWL.

- Background: 250mm reinforced concrete. - Parge coat: Gyproc Soundcoat Plus as clause 326A. - Performance criteria: U-value: 0.29 W/m²K. British Gypsum calculation TCE-14751773-UVMF element 1 Fire resistance (including background) to BS 476: Part 22: n/a. Fire protection to BS 476: Part 21: 1987: n/a. Sound insulation: Rw 35 dB estimated (subject to concrete performance/mass). Duty Rating to BS 5234: Parts 1 and 2: Medium. - Maximum unbraced height based on limiting deflection of L/240 at 200Pa: 5100mm. - Clear cavity width: 31mm behind insulation (with 15mm board) or 33.5mm behind insulation

(with 12.5mm board). Based on overall wall thickness 440mm. - Timber sole plate: 38mm (nominal) x Gypframe channel width, if required. - Framing: Studs: Gypframe 92 I 90 at 600mm centres and Gypframe 92 S 50 at abutments,



linings, or as an alternative to fixing T for single layer board linings. - Head condition: Suitably fixed up to structural soffit. Deflection allowance: To be determined by a Structural Engineer. - Cavity insulation: 100mm Isover Acoustic Partition Roll (APR 1200) in stud cavity &

50mm Isover Acoustic Partition Roll (APR 1200) behind studs. Recycled content: Up to 86%. - Lining: One layer 15mm Gyproc DuraLine or 15mm Gyproc WallBoard or 15mm

Gyproc Moisture Resistant or 12.5mm Glasroc H TILEBACKER, sheet width 1200mm. As indicated on layout drawings.

Fixings: As clause 591A. Screws: 25mm British Gypsum Jack-Point Screws to I studs and 25mm British


- 0.25mm polythene behind plasterboard. - Please Note: Before altering this specification check with the design team that any proposed changes will not



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155A METAL STUD PARTITION – P1A: Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX


Product reference: GypWall CLASSIC. Nominal thickness (excluding finishes): 124mm. - Performance criteria: Fire resistance to BS 476: Part 22: 30 minutes. Sound insulation: Rw 42 dB estimated. Partition duty to BS 5234: Parts 1 and 2: Medium. Maximum height based on limiting deflection of L/240 at 200Pa: 4500mm. - Timber sole plate: 38mm (nominal) x channel width, if required. - Framing: Studs: Gypframe 92 S 50 at 600mm centres and Gypframe 92 S 50 at abutments,

openings and junctions. Stud boxing: n/a. Floor channel: Gypframe 94 FEC 50 (heights up to 4200mm), Gypframe 94 DC 60 (heights


linings, or as an alternative to fixing T for single layer board linings. - Head condition: Suitably fixed up to structural soffit. Deflection allowance: To be determined by a Structural Engineer. - Lining: One layer 15mm Gyproc WallBoard or 15mm Gyproc Moisture Resistant or

12.5mm Glasroc H TILEBACKER, sheet width 1200mm, to both sides of framing. As indicated on layout drawings.

Fixing: As clause 591A. Screws: 25mm British Gypsum Drywall Screws. Recycled content: Up to 86%. - Cavity insulation: 25mm Isover Acoustic Partition Roll (APR 1200). - Gyproc Sealant: As clause 516A. - Finishing: Taped seamless finish as clause 671A. - Accessories: Gyproc Profilex access panels as clause 531A – if required. - Other requirements: - Please Note: Before altering this specification check with the design team that any proposed changes will not



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167B METAL STUD PARTITION – WALL TYPE P2C: Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX


Product reference: ShaftWall. Nominal thickness (excluding finishes): 124mm. - Performance criteria: Fire resistance to BS 476: Part 22: (shaft to room) 120 mins Integrity, 120 mins Insulation. (room to shaft) 120 mins Integrity, 90 mins Insulation. Sound insulation: Rw 44 dB. Partition duty to BS 5234: Parts 1 and 2: Severe.

Maximum height based on limiting deflection of L/240 at 200Pa: 6700mm. - Framing: Studs: Gypframe 92 I 90 at 600mm centres. Floor channel: Gypframe 94 FEC 50 (height up to 4200mm), Gypframe 94 DC 60 (height

over 4200 -8000mm). Head/opening channel: Gypframe 94 EDC 70. Abutment channel: Gypframe 90 SC 90. Retaining channel: Gypframe G105. Fixing T: Gypframe GFT1 to support horizontal board joints of single layer plasterboard

linings. Fixing strap: Gypframe GFS1 to support horizontal joints in face layer of double layer board

linings, or as an alternative to fixing T for single layer board linings. - Head condition: Suitably fixed up to structural soffit. Deflection allowance: To be determined by a Structural Engineer. - Core: 19mm Gyproc CoreBoard. Horizontal joints: Gypframe GA3 angle and 122mm high strip of 19mm Gyproc CoreBoard. - Lining: Two layers 15mm Gyproc FireLine on one side of framing, sheet width 1200mm. Fixing: As clause 591B. Screws: 25mm and 41mm British Gypsum Jack-Point Screws to I studs and 25mm

and 40mm British Gypsum Drywall Screws elsewhere. - Cavity insulation: n/a. Recycled content: n/a. - Gyproc Sealant: As clause 516A (General) (or) As clause 521A (air pressure requirement). - Finishing: Taped seamless finish as clause 671A. - Accessories: Gyproc Profilex access panels as clause 531A – if required. - Other requirements: - Please Note: Before altering this specification check with the design team that any proposed changes will not



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167D METAL STUD PARTITION – WALL TYPE P2C* ADDITIONAL DECORATIVE BOARD: Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX



Maximum height based on limiting deflection of L/240 at 200Pa: 6700mm. - Framing: Studs: Gypframe 92 I 90 at 600mm centres. Floor channel: Gypframe 94 FEC 50 (height up to 4200mm), Gypframe 94 DC 60 (height

over 4200 -8000mm). Head/opening channel: Gypframe 94 EDC 70. Abutment channel: Gypframe 90 SC 90. Retaining channel: Gypframe G105. Fixing T: Gypframe GFT1 to support horizontal board joints of single layer plasterboard


linings, or as an alternative to fixing T for single layer board linings. - Head condition: Suitably fixed up to structural soffit. Deflection allowance: To be determined by a Structural Engineer. - Core: 19mm Gyproc CoreBoard. Horizontal joints: Gypframe GA3 angle and 122mm high strip of 19mm Gyproc CoreBoard. - Lining: Two layers 15mm Gyproc FireLine, on one side of framing, sheet width 1200mm.

One layer 12.5mm Gyproc WallBoard, on other side of framing, sheet width 1200mm. Fixing: As clause 591B. Screws: 25mm and 41mm British Gypsum Jack-Point Screws to I studs and 25mm




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168A METAL STUD PARTITION – P2D: Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX


Product reference: GypWall CLASSIC. Nominal thickness (excluding finishes): 122mm. - Performance criteria: Fire resistance to BS 476: Part 22: 120 minutes. Sound insulation: Rw 46 dB. Partition duty to BS 5234: Parts 1 and 2: Severe. Maximum height based on limiting deflection of L/240 at 200Pa: 4600mm. - Timber sole plate: 38mm (nominal) x channel width, if required. - Framing: Studs: Gypframe 70 S 50 at 600mm centres and Gypframe 70 S 50 at abutments,

openings and junctions. Stud boxing: n/a. Floor channel: Gypframe 72 FEC 50 (height up to 4200mm), 72 DC 60 (heights up to

8000mm), 72 EDC 80 (heights over 8000mm). Head channel: As floor channel or as determined by deflection criteria. Fixing T: Gypframe GFT1 to support horizontal joints of single layer board linings. Fixing strap: Gypframe GFS1 to support horizontal joints in face layer of double layer board

linings, or as an alternative to fixing T for single layer board linings. - Head condition: Suitably fixed up to structural soffit. Deflection allowance: To be determined by a Structural Engineer. - Lining: Two layers 12.5mm Gyproc FireLine, sheet width 1200mm, to both sides of

framing. Fixing: As clause 591A. Screws: 25mm & 35mm British Gypsum Drywall Screws. - Cavity insulation: n/a. Recycled content: n/a. - Gyproc Sealant: As clause 516A. - Finishing: Taped seamless finish as clause 671A. - Accessories: Gyproc Profilex access panels as clause 531A – if required. - Other requirements: - For 30 minutes fire resistance, remove outer layer of Gyproc FireLine. Sound insulation

becomes Rw 37 dB estimated, maximum height 3600mm & Duty Rating Medium. - Please Note: Before altering this specification check with the design team that any proposed changes will not



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169A METAL STUD PARTITION – P2E: Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX


Product reference: GypWall CLASSIC. Nominal thickness (excluding finishes): 132mm. - Performance criteria: Fire resistance to BS 476: Part 22: N/A. Sound insulation: Rw 54 dB. Partition duty to BS 5234: Parts 1 and 2: Severe. Maximum height based on limiting deflection of L/240 at 200Pa: 4900mm. - Timber sole plate: 38mm (nominal) x channel width, if required. - Framing: Studs: Gypframe 70 S 50 at 600mm centres and Gypframe 70 S 50 at abutments,

openings and junctions. Stud boxing: n/a. Floor channel: Gypframe 72 FEC 50 (height up to 4200mm), 72 DC 60 (heights up to

8000mm), 72 EDC 80 (heights over 8000mm). Head channel: As floor channel or as determined by deflection criteria. Fixing T: Gypframe GFT1 to support horizontal joints of single layer board linings. Fixing strap: Gypframe GFS1 to support horizontal joints in face layer of double layer board

linings, or as an alternative to fixing T for single layer board linings. - Head condition: Suitably fixed up to structural soffit. Deflection allowance: To be determined by a Structural Engineer. - Lining: Two layers 15mm Gyproc SoundBloc, sheet width 1200mm, to both sides of

framing. Fixing: As clause 591A. Screws: 25mm & 40mm British Gypsum Drywall Screws. - Cavity insulation: 25mm Isover Acoustic Partition Roll (APR 1200). Recycled content: Up to 86%. - Gyproc Sealant: As clause 516A. - Finishing: Taped seamless finish as clause 671A. - Accessories: Gyproc Profilex access panels as clause 531A – if required. - Other requirements: - Please Note: Before altering this specification check with the design team that any proposed changes will not



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170A METAL STUD PARTITION – P2F: Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX



Maximum height based on limiting deflection of L/240 at 200Pa: 4400mm. - Framing: Studs: Gypframe 70 I 70 at 600mm centres. Floor channel: Gypframe 72 FEC 50 (height up to 4200mm), Gypframe 72 DC 60 (heights

over 4200-8000mm). Head/opening channel: Gypframe 72 EDC 80. Abutment channel: Gypframe 70 SC 70. Retaining channel: Gypframe G110. Fixing T: Gypframe GFT1 to support horizontal board joints of single layer plasterboard


linings, or as an alternative to fixing T for single layer board linings. - Head condition: Suitably fixed up to structural soffit. Deflection allowance: To be determined by a Structural Engineer. - Core: 19mm Gyproc CoreBoard. Horizontal joints: Gypframe GA3 angle and 122mm high strip of 19mm Gyproc CoreBoard. - Lining: Two layers 12.5mm Gyproc FireLine, on one side of framing, sheet width

1200mm. Fixing: As clause 591B. Screws: 25mm and 35mm British Gypsum Jack-Point Screws to I studs and 25mm




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170B METAL STUD PARTITION – P2F* ADDITIONAL DECORATIVE BOARD: Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX






linings, or as an alternative to fixing T for single layer board linings. - Head condition: Suitably fixed up to structural soffit. Deflection allowance: To be determined by a Structural Engineer. - Core: 19mm Gyproc CoreBoard. Horizontal joints: Gypframe GA3 angle and 122mm high strip of 19mm Gyproc CoreBoard. - Lining: Two layers 12.5mm Gyproc FireLine, on one side of framing, sheet width

1200mm. One layer 12.5mm Gyproc WallBoard, on other side of framing, sheet width 1200mm.

Fixing: As clause 591B. Screws: 25mm and 35mm British Gypsum Jack-Point Screws to I studs and 25mm




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171A METAL STUD PARTITION – P2G: Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX






linings, or as an alternative to fixing T for single layer board linings. - Head condition: Suitably fixed up to structural soffit. Deflection allowance: To be determined by a Structural Engineer. - Core: 19mm Gyproc CoreBoard. Horizontal joints: Gypframe GA3 angle and 122mm high strip of 19mm Gyproc CoreBoard. - Lining: Two layers 15mm Gyproc FireLine, on one side of framing, sheet width 1200mm. Fixing: As clause 591B. Screws: 25mm and 41mm British Gypsum Jack-Point Screws to I studs and 25mm




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171B METAL STUD PARTITION – P2G* ADDITIONAL DECORATIVE BOARD: Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX






linings, or as an alternative to fixing T for single layer board linings. - Head condition: Suitably fixed up to structural soffit. Deflection allowance: To be determined by a Structural Engineer. - Core: 19mm Gyproc CoreBoard. Horizontal joints: Gypframe GA3 angle and 122mm high strip of 19mm Gyproc CoreBoard. - Lining: Two layers 15mm Gyproc FireLine, on one side of framing, sheet width 1200mm.

One layer 12.5mm Gyproc WallBoard, on other side of framing, sheet width 1200mm. Fixing: As clause 591B. Screws: 25mm and 41mm British Gypsum Jack-Point Screws to I studs and 25mm




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172A METAL STUD PARTITION – P2H: Name of project: HMRC, 6 & 7 Central Square, Cardiff - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX






linings, or as an alternative to fixing T for single layer board linings. - Head condition: Suitably fixed up to structural soffit. Deflection allowance: To be determined by a Structural Engineer. - Core: 19mm Gyproc CoreBoard. Horizontal joints: Gypframe GA3 angle and 122mm high strip of 19mm Gyproc CoreBoard. - Lining: Three layers 15mm Gyproc FireLine, on one side of framing, sheet width 1200mm. Fixing: As clause 591B. Screws: 25mm, 41mm and 60mm British Gypsum Jack-Point Screws to I studs and

25mm, 40mm and 55mm British Gypsum Drywall Screws elsewhere. - Cavity insulation: n/a. Recycled content: n/a. - Gyproc Sealant: As clause 516A (General) (or) As clause 521A (air pressure requirement). - Finishing: Taped seamless finish as clause 671A. - Accessories: Gyproc Profilex access panels as clause 531A – if required. - Other requirements: - Please Note: Before altering this specification check with the design team that any proposed changes will not



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226A SUSPENDED CEILING ON METAL FRAMING – CL02: Name of project: HMRC, 6 & 7 Central Square, Cardiff. - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX

Website: www.british-gypsum.com, Tel: 0115 945 6123,E-Mail: [email protected]. British Gypsum contact: Graham Lloyd Tel 07786 337414, email [email protected] Product reference: CasoLine MF. - Structural soffit: Structure. - Performance criteria: Fire resistance to BS 476: Part 21 or 22: n/a. Fire protection to steels BS 476: Part 23: n/a. Sound insulation: n/a. Sound Absorption Class: n/a. Cavity/Plenum depth: 75mm (min.) - Suspension system: Hangers: Gypframe FEA1 Steel angle fixed to soffit through 2 folds of metal angle as

per site book detail. Primary grid: Gypframe MF7 channels at 1200mm centres, suspended from hangers at

1200mm centres. Secondary grid: Gypframe MF5 sections at 450mm centres, fixed to primary grid with

British Gypsum Wafer Head Jack-Point Screws Perimeters: Gypframe MF6 channel. - Lining: One layer of 12.5mm Gyproc WallBoard. Substitute with 12.5mm Gypoc

Moisture Resistant where required. Fixing: As clause 591A. Screws: 25mm British Gypsum Drywall Screws. - Cavity insulation: n/a. Recycled content: n/a. - Gyproc Sealant: As clause 516A. - Finishing: Taped seamless finish as clause 671A. - Accessories: Gyproc Profilex access panels as clause 531A – if required. - Other requirements: - Please Note: Before altering this specification check with the design team that any proposed changes will not

jeopardise the project environmental assessment rating target (BREEAM, CfSH, LEED, etc.) - Please Note: Before altering an ACTIVair specification check with the design team that any proposed changes

will not jeopardise the project's indoor air quality performance or air quality management plan. - Please always refer to current literature by visiting www.british-gypsum.com

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227A SUSPENDED CEILING ON METAL FRAMING – CL03: Name of project: HMRC Plot 6 & 7, Cardiff. - Drawing reference(s): _________ - Manufacturer: British Gypsum, East Leake, Loughborough, Leicestershire LE12 6HX


Product reference: CasoLine MF. - Structural soffit: Structure. Performance criteria: Sound Absorption Class: B. Sound Absorption Coefficient (αw): 0.80 Cavity/Plenum depth: 200mm (min.) - Suspension system: Hangers: Gypframe FEA1 Steel angle fixed to soffit through 2 folds of metal angle as

per site book detail. Primary grid: Gypframe MF7 channels at 1000mm centres, suspended from hangers at

900mm centres. Secondary grid: Gypframe MF5 sections at nominal 330mm centres, fixed to primary

grid with British Gypsum Wafer Head Jack-Point Screws. Perimeters: Gypframe MF6 channel. - Lining: One layer 12.5mm Rigitone 8/18 Q (see clause K10/410). Fixing: As clause 592B. Screws: 30mm Rigitone Screws. - Cavity insulation: 25mm Isover Acoustic Partition Roll (APR 1200). Recycled content: Up to 86%. - Acoustic sealant: Not required. - Finishing: Seamless finish as clause 676B. - Services fittings: Install _________ - Accessories: Gyproc Profilex access panels as clause 531A – if required. - Other requirements: - Please Note: Before altering this specification check with the design team that any proposed changes will not

jeopardise the project environmental assessment rating target (BREEAM, CfSH, LEED, etc.) - Please always refer to current literature by visiting www.british-gypsum.com GENERALLY/PREPARATION 300 ENVIRONMENT – ISO14001: British Gypsum has ISO 14001 certification across the entire

business including: mining, manufacture, distribution, and all ancillary services to support the business function.

301 ENVIRONMENT - BREEAM RATED PROJECTS: Prior to making any amendments

to British Gypsum specifications consult with the design team responsible for the project for guidance. BREEAM (or similar environmental framework) ratings may be downgraded as a result of changes to this specification.

305 COMPLIANCE WITH PERFORMANCE REQUIREMENTS: - Provide UKAS/NAMAS accredited laboratory test/assessment report(s) for the following: _________ - All materials, components and details used must be in accordance with the test/assessment

report(s). If discrepancies arise, obtain instructions. 315 EXISTING FIXTURES, SERVICES, ETC: Ensure that surface mounted pipework, conduit,

cables, electrical outlets, fixtures, appliances, fixing brackets, clips, skirtings, architraves, etc., are removed from existing backgrounds which are to be lined.

325 PREPARATION OF SOLID BACKGROUNDS: - Complete all cutting, chasing, plugging and making good. - Remove all loose material by brushing thoroughly.

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- Remove all oil, grease, wallpaper, etc. by scrubbing with water and detergent. Rinse with clean water and allow to dry.

- For adhesive fixed wall linings, adjust suction of background as necessary using primers or bonding agents recommended for the purpose.

326A PARGE COATS:

- Apply a continuous coat of Gyproc Soundcoat Plus at least 6mm thick to the entire surface of the background ensuring all cracked or unfilled joints are covered. Allow to set before following on with Gyproc plasterboard installation.

331A THERMAL SEALS FOR GYPROC LININGS: - Manufacturer and reference: British Gypsum, Gyproc Dri-Wall Adhesive or Gyproc Sealant. - Before/during installation of dry lining system, fully seal all airpaths around the perimeter of

the background and around structural openings and service penetrations through the background.

- Apply as a continuous fillet, leaving no gaps. 345 ADDITIONAL SUPPORTS FOR PARTITION HEADS: Provide or ensure provision of

accurately positioned and securely fixed framing to receive partition heads running parallel with, but offset from main structural supports.

355 ADDITIONAL SUPPORTS FOR FIXTURES AND FITTINGS: Provide or ensure provision of

accurately positioned and securely fixed framing to support fixtures, fittings and services. After fixing boards, mark positions of framing for following trades.

365 ADDITIONAL SUPPORTS FOR BOARD EDGES AND PERIMETERS: Provide or ensure

provision of additional framing, accurately positioned and securely fixed, to give full support to board edges and lining perimeters in accordance with board manufacturer's recommendations.

375 NEW WET LAID BASES: Provide or ensure provision of a continuous strip of bituminous felt

DPC or other approved material under partitions/freestanding wall linings, cut to the full width of the partition/lining.

385 SERVICE PENETRATIONS: The dry lining contractor must liaise with the Main Contractor

and other contractors to ensure that fire resistance and other specified performance requirements are not impaired by service penetrations.

In particular: - Form framed openings accurately for grouped services, ducts, etc. allowing for associated

fire barriers. - Provide insulation backings to recessed electrical outlets and switches as recommended by

the plasterboard manufacturer. 395 CONTROL SAMPLE(S): Complete area(s) of finished work in approved locations as follows

and obtain approval of appearance before proceeding: _________ 405 PLASTERBOARD GENERALLY: To BS EN 520: types A, H1(Moisture Resistant), F, P, D,

R or I with exposed surface and edge profiles suitable to receive the specified finish. 406 GYPSUM BOARD WITH MAT REINFORCEMENT (GLASROC F FIRECASE): To EN

15283: Part 1, Types GM-F & H2 (Moisture Resistant). 407 GYPSUM BOARD WITH MAT REINFORCEMENT (GLASROC F MULTIBOARD):

a) 6mm thick to EN 15283: Part 1, Types GM-F & H1(Moisture Resistant) b) 10mm/ 12.5mm thick to EN 15283: Part 1, Types GM-F.

408 GYPSUM FIBRE BOARD (RIGIDUR H): To EN 15283: Part 2, Types GF, C1, I & W2.

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409 GYPSUM BOARD WITH MAT REINFORCEMENT (GLASROC H TILEBACKER ): To EN 15283: Part 1, Types GM-H1(Moisture Resistant).

410 ACTIVair Technology:

- Products: Rigidur H ACTIVair Gyptone Rigitone

- Decoration: After the joint treatment or plaster skim has dried, decoration including any

decorator’s preparatory work should follow. Please note however that any decoration should be breathable to allow Formaldehyde and other pollutants to pass through the finish and be absorbed by the plasterboard.

Painting: Breathable paints – please consult the appropriate paint manufacturer. Wallpaper: Use only breathable wallpapers– please consult the appropriate wallpaper manufacturer.

- Limitations: Finishes that restrict the board surface permeability e.g. Tiling, Marble and other non-breathable wall finishes, will limit the absorption of Formaldehyde and other pollutants for the area covered

FIXING/FINISHING 435 DRY LINING GENERALLY: - Fixing, jointing and finishing materials and accessories, where not specified otherwise, to be

as recommended by the board manufacturer. - Handle and store materials in accordance with BS 8212:1995, section 5. Do not use

damaged boards. - Use operatives properly trained for dry lining work and who have attended a recognised

training scheme. - Fix boards only in areas which have been made weathertight. Prevent frost damage. - Cut boards neatly and accurately without damage to core or tearing of paper facing. Keep

cut edges to a minimum and position at internal angles wherever possible. Mask with bound edges of adjacent boards at external corners.

- Fix boards securely and firmly to suitably prepared and accurately levelled backgrounds. Set heads of fastenings in a depression; do not break paper or gypsum core. Finish neatly to give flush, smooth, flat surfaces free from bowing and abrupt changes of level.

445 CEILINGS: Fix boards to ceilings before walls and partitions. Fix boards with bound edges

at right angles to supports and with ends staggered in adjacent rows. 445A CEILINGS (GYPTONE): Fix boards to ceilings before walls and partitions. Fix boards with

bound edges at right angles to supports and with ends aligned in adjacent rows. 445B CEILINGS (RIGITONE): Fix boards to ceilings before walls and partitions. Fix boards with

long edges at right angles to supports and with ends aligned in adjacent rows. When planning the boarding layout consideration should be given to running the long edges of the boards parallel to the incidence of any light source.

455A METAL STUD FRAMING: - Install using components, accessories and methods recommended by the board

manufacturer. - Set out floor/head channels and perimeter studs to give a framework which is accurately

aligned with a true vertical plane. Fix securely at all perimeters at not more than 600mm centres.

- Position studs at equal centres to suit specified linings, maintaining sequence across openings. Provide additional studs as necessary to ensure support to all vertical edges of boards.

- Accurately form openings to receive door sets using Gypframe metal studs and suitable timber framing or Gypframe metal studs sleeved with Gypframe channel as necessary to

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achieve the strength grade requirements of the framing assembly and adequately support the weight of the door.

465A STAGGERED STUD PARTITIONS: Ensure that additional noggings, bearers, etc. are fixed

between alternate studs and do not touch adjacent offset studs. Do not fix boards to adjacent offset studs. Ensure that acoustic isolation between each side of partition is maintained at corners.

467A BRITISH GYPSUM METAL STUD PARTITIONS: Fix Gypframe 94 and 148mm wide

floor/head channels, and Gypframe 92 and 146mm perimeter abutment studs using two rows of staggered fixings, each at 600mm centres.

468A BRITISH GYPSUM SHAFTWALL: Notwithstanding clause 455A, fix head channel securely

at not more than 300mm centres, incorporating Gyproc FireStrip. 476B JUNCTIONS between partitions and GypLyner IWL independent wall linings: Where board

linings are installed prior to partitions, install additional Gypframe I studs at each partition abutment (number of additional I studs subject to width of partition).

481A METAL FRAMING FOR GYPLYNER UNIVERSAL WALL LINING: - Securely fix Gypframe GL8 floor/ceiling track at 600mm centres. - Position Gypframe GL2/GL9 brackets at equal vertical centres and fix to background with

Gypframe GL11 GypLyner Anchors for solid backgrounds or proprietary fixings for hollow backgrounds.

- Position Gypframe GL1 lining channels at equal centres, maintaining sequence across openings, and locate in Gypframe GL8 track at floor and ceiling. Provide additional Gypframe GL1 lining channels as necessary to ensure support to all vertical edges of boards. Fix Gypframe GL1 lining channels to Gypframe GL2/GL9 brackets using Wafer Head Screws.

- Provide additional Gypframe GL1/GL8 sections at wall abutments and corners as recommended by board manufacturer.

- Install Gypframe GFT1 Fixing T for single layer board applications, inserted between face of framework and back of plasterboard lining, or Gypframe GFS1 Fixing Strap for double layer board applications, inserted between board layers, to receive fixings at end board joints. Ensure end board joints do not coincide with Gypframe GL1 lining channel joints.

485 METAL SUSPENDED CEILING FRAMING: - Install using components, accessories and methods recommended by the board

manufacturer. - Set out perimeter channels, hangers and sections to give a framework which is accurately

aligned and level. Fix securely with additional framing and stiffening at upstands, partition heads, access hatches, etc. to give a stable ceiling.

491A METAL FRAMING FOR THREE SIDED GYPLYNER STEEL ENCASEMENT: - Fix continuous lengths of Gypframe GA2 angle onto face of innermost steel flanges or

background using fire resistant fixings at 600mm centres. Alternatively, use shot-fired fixings at same centres.

- Push fit Gypframe GL10 framing clips onto edges of outermost steel flanges at 800mm max centres.

- Push fit Gypframe GL1 lining channel onto each row of Gypframe GL10 framing clips. - Install Gypframe GFT1 fixing T or short sections of Gypframe GL1 lining channel to support

ends of boards in single layer linings, and Gypframe GFS1 fixing straps to support ends of boards in the face layer of multiple layer linings.

- Stagger joints between layers in multiple layer boarding. 491B METAL FRAMING FOR FOUR SIDED GYPLYNER STEEL ENCASEMENT: - Push fit Gypframe GL10 framing clips onto edge of each steel flange at 800mm max

centres. - Push fit Gypframe GL1 lining channel onto each row of Gypframe GL10 framing clips.

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- Install Gypframe GFT1 fixing T or short sections of Gypframe GL1 lining channel to support ends of boards in single layer linings, and Gypframe GFS1 fixing straps to support ends of boards in the face layer of multiple layer linings.

- Stagger joints between layers in multiple layer boarding. 495 MINERAL WOOL INSULATION TO METAL STUD PARTITIONS/LININGS: - Fit securely with closely butted joints, leaving no gaps. Unless the insulation is of a self

supporting slab type fitted between studs, fix at head of frame using short sections Gypframe angles or proprietary clips by others.

500 MINERAL WOOL INSULATION ACROSS METAL SUSPENDED CEILING FRAMING: - Use widest practical widths of insulation. Fit securely with closely butted joints, leaving no

gaps. - Cut and fit neatly around any electrical fittings, etc. Do not cover electrical cables (unless

they have been sized accordingly). 516A ACOUSTIC SEALANT: - Manufacturer and reference: British Gypsum, Gyproc Sealant. - Location: At junctions with adjoining structure, and at other airpaths. - Apply as a continuous bead to clean, dry, dust-free surfaces, leaving no gaps. - After application of sealant, bulk fill gaps between floor and underside of plasterboard using

Gyproc joint compound. 521A AIR PRESSURE SEALANT (SHAFTWALL) TO _________ - Sealant: British Gypsum, Gyproc Sealant. - Location: - To all framing members at perimeter junctions with walls, floors and ceilings, air gaps

around openings, and other potential air leakage points. - To frame members prior to fitting core boards and around fire stops cloaking horizontal

core board joints. - To all metal framing around board perimeters of first layer boarding and board perimeters

when fixing outer layer board. - Apply as a continuous bead leaving no gaps. 525 CAVITY BARRIERS WITHIN _________ - Material: _________ - Form accurately and fix securely across full width of the cavity with no gaps at joints and

perimeters, to provide a complete barrier to smoke and flame. 526A CAVITY BARRIERS (SINGLE FRAME PARTITION): - Maintain continuity of fire barrier formed by perimeter channels using short lengths of close

fitting plasterboard screwed into the web across joints in channel sections and around service holes, except where:

- The partitions abut plasterboard linings or masonry. - Timber sole or head plates are fitted. - Form continuous vertical barriers using lengths of close fitting plasterboard screwed into the

web of individual studs or channels. 526B CAVITY BARRIERS (SHAFTWALL): - Maintain continuity of fire barrier formed by perimeter channels using short lengths of close

fitting plasterboard screwed into the web across joints in channel sections and around service holes, except where partitions abut plasterboard linings or masonry.

- Form continuous vertical barriers using stone mineral wool strip cut neatly to fit across the stud cavity.

526C CAVITY BARRIERS (GYPWALL STAGGERED): Form continuous vertical barriers using

stone wool strip cut neatly to fit across stud cavity. 526D CAVITY BARRIERS (TWIN FRAME PARTITION):

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- Maintain continuity of fire barrier formed by perimeter channels using short lengths of close fitting Gyproc plasterboard screwed into the web across joints in channel sections and around service holes, except where:

- The partitions abut plasterboard linings or masonry. - Timber sole or head plates are fitted. - Form continuous vertical barriers using 12.5mm Gyproc plasterboard cut to a good fit and

screw-fixed to each of a pair of studs, and spanning the whole cavity width. 531A GYPROC PROFILEX ACCESS PANELS: - Manufacturer: Artex Limited. - Standard Panels – Contact T: 0800 032 6345, E: [email protected] - Bespoke Panels – Contact T: 0115 984 9116, E: [email protected] 545 CAVITY BARRIERS WITHIN CEILING VOIDS: - Fire resistance to BS 476: Part 20: Integrity/insulation (minutes) _________ Material: _________ Fixing: _________ - Unless shown otherwise, install barriers to subdivide the ceiling void into areas not

exceeding ___ m square. - Fix securely at perimeters and joints, ensuring permanent stability and continuity with no

gaps, to provide a complete barrier to smoke and flame. 551D MOVEMENT JOINTS (GYPLYNER IWL): - Manufacturer and reference: British Gypsum, Gyproc Control Joint. Width of gap: 12mm - Fix through each flange using 13mm corrosion resistant staples at 150mm centres. Seal

ends with Gyproc Sealant or acrylic caulk. - Support edges of plasterboard on each side of joint with Gypframe I studs. 551E MOVEMENT JOINTS (GYPLYNER UNIVERSAL WALL LINING): - Manufacturer and reference: British Gypsum, Gyproc Control Joint. Width of gap: 12mm - Fix through each flange using 13mm corrosion resistant staples at 150mm centres. Seal

ends with Gyproc Sealant or acrylic caulk. - Support edges of plasterboard on each side of joint with Gypframe GL1 lining channel

sections. 555A FIRE STOPPING: Seal any gaps at junctions of linings and cavity barriers with perimeter

abutments, service penetrations, etc. using tightly packed stone mineral wool or fire resisting / intumescent sealant, to prevent penetration of smoke and flame.

560A JOINTS BETWEEN BOARDS: - Gyproc plasterboards: Lightly butt boards together. - Square edged Gyproc plasterboards to be finished with Artex textured compound: 3mm

gap. - Glasroc F fibre reinforced gypsum boards: Lightly butt boards together. 565 VERTICAL JOINTS: - Centre joints on studs. For partitions, ensure that joints on opposite sides of studs are

staggered. - For two layer boarding, stagger joints between layers. 570A HORIZONTAL JOINTS: - Horizontal joints will not be permitted in surfaces exposed to view except where the height

of partition/lining exceeds the maximum available length of board. Agree positions of joints where not specified.

- For two layer boarding, stagger joints between layers by at least 600mm. If previous layer of plank plasterboard, stagger joints between layers by 300mm.

- Ensure that edges of boards are supported by additional framing. For two layer boarding framing must support the outer layer.

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572A CEILING JOINTS: For multi-layer boarding, stagger joints between layers by at least

600mm. 580 INSULATION BACKED PLASTERBOARD: Avoid damage to insulation and do not cut away

to accommodate services. Carefully cut back insulation or plasterboard as appropriate along edges of boards at angles to give a continuous plasterboard face, with no gaps in the insulation.

591A FIXING PLASTERBOARD TO METAL SUPPORTS: - Partitions/linings/casings: - Face layer (Plasterboard):

Fix securely to all supports at maximum 300mm centres (reduced to 200mm at external angles where recommended by the board manufacturer).

- Face layer (Habito): Fix securely to all supports at maximum 600mm centres (reduced to 400mm at

external angles where recommended by the board manufacturer). - Previous layer of plank plasterboard: Install with long edges at right angles to studs, and

fix securely to each stud using two screws. - Other previous layers: Fix securely to supports around the perimeter of each board at

maximum 300mm centres. - Ceilings: Fix securely to all supports at maximum 230mm centres (reduced to 150mm at

board ends and at lining perimeters where recommended by the board manufacturer). - Fix working from the centre of each board. Position screws not less than 13mm from cut

edges and 10mm from bound edges of boards. Set heads in a depression; do not break paper or gypsum core.

591B FIXING PLASTERBOARD TO METAL SUPPORTS (SHAFTWALL): - Working from the centre of each board, fix securely to all supports at maximum 300mm

centres, reduced to 200mm at external angles. - Fix working from the centre of each board. Position screws not less than 13mm from cut

edges and 10mm from bound edges of boards. Set heads in a depression; do not break paper or gypsum core.

592B FIXING RIGITONE BOARD TO METAL SUPPORTS:

- Ceilings: Prior to board installation prime all board edges with an application of Thistle GypPrime diluted four parts water to one part GypPrime and allow to dry for a 24 hours.

- Fix securely to all supports at maximum 230mm centres (reduced to 150mm at board ends). - Fix around board perimeters before making fixings in the field of the board. Do not fix into

Gypframe MF6 channels around ceiling perimeter. Position screws not less than 13mm from the edge of the board. Set heads in a depression; do not damage the board perforations or break paper or gypsum core.

593A BOARD END SUPPORTS (CASOLINE MF): The specified MF5 channel centres are the

maximum permitted. Closer centres may be used for some board lengths to ensure end joints are fully supported; alternatively, cut boards to a co-ordinating length.

593B BOARD END SUPPORTS (GYPLYNER UNIVERSAL CEILING): The specified GL1 lining

channel centres are the maximum permitted. Closer centres may be used for some board lengths to ensure end joints are fully supported; alternatively, cut boards to a co-ordinating length.

595 DEFLECTION HEADS: Do not fix boards to head channels when a deflection head is

specified. 597A SINGLE LAYER LININGS TO RECEIVE CERAMIC FINISHES (SHAFTWALL): Fix

Gypframe 99 FC 50 Fixing Channel between studs at 1200mm vertical centres to support the back face of the plasterboard.

K10


598A TWO LAYER LININGS TO RECEIVE CERAMIC FINISHES (SHAFTWALL): Bond the two layers together with a continuous bead of Gyproc Sealant applied midway between studs.

671A TAPED SEAMLESS FINISH TO PLASTERBOARD: - Manufacturer: British Gypsum. Joint compound: One or more of the following Gyproc products:

Gyproc Easi-Fill Gyproc Easi-Fill 45 Gyproc Joint Filler Gyproc Joint Cement Gyproc Ready Mix Joint Cement Gyproc ProMix LITE Joint Cement.

Joints/gaps: Gyproc Joint Tape

Internal/ angled corners: Gyproc Joint Tape or Gyproc Easyflex PRO (for Extra Durability)

External corners: Gyproc Aquabead (for Speed and Extra Durability) Gyproc Easyflex PRO (for Extra Durability) Gyproc Corner Tape Gyproc Drywall Metal Angle Bead

Shadow gaps: BGM105 Styletrim (25 x 10mm) BGM106 Styletrim (12.5 x 10mm)

Board ends: Gyproc Drywall Plastic Edge Bead or Gyproc Drywall Metal Edge Bead

Primer/sealer: Two coats Gyproc Drywall Sealer where vapour control required (will provide

vapour resistance only and does not meet performance requirements for moisture resistant grade boards as defined in BS EN520, type H1)

Alternatively, one coat Gyproc Drywall Sealer for simple steam stripping of wall coverings (except for vinyl or other low permeability wall coverings) at a later date.

One coat Gyproc Drywall Primer elsewhere. - Lightly sand cut edges of boards to remove paper burrs. - Fill all joints, gaps and internal angles with joint compound and cover with continuous

lengths of tape, fully bedded. Reinforce external angles, stop ends, etc. with the specified bead/corner tape.

- When set, cover with joint compound, feathered out to give a flush, smooth, seamless surface.

- Spot nail/screw depressions with joint compound to give a flush surface. - Fill minor indents. After joint, angle and spotting treatments have dried, lightly sand to

remove any minor imperfections. - Apply specified primer/sealer to give a continuous consistent texture to surface of boards. 676A TAPED SEAMLESS FINISH TO GLASROC FIBRE REINFORCED GYPSUM BOARD: - Manufacturer: British Gypsum. Joint compound:

Gyproc Joint Cement Joints/gaps/internal corners:

Gyproc Joint Tape or Thistle ProTape FT50

External corners: Gyproc Easyflex PRO (for Extra Durability) Gyproc Corner Tape Gyproc Drywall Metal Angle Bead (bedded on to Gyproc Joint Filler)

K10


- Apply Gyproc Joint Cement to the joint and bed in Gyproc Joint Tape. Allow to dry and lightly sand to remove any high spots. Gyproc Joint Tape should be used in internal angle joints. Trowel apply a second coat of Gyproc Joint Cement and feather out to about 200mm width on each side of the joint. Allow to dry and lightly sand.

- Spot nail/screw/staple depressions with two coats of joint compound to give a flush surface. - Fill minor indents with a single coat of joint compound to give a flush surface. - After joint, angle and spotting treatments have dried, lightly sand to remove any minor

imperfections. 676B SEAMLESS FINISH TO RIGITONE: Cut edges of boards: Lightly sand to remove paper burrs. Joint filling: Cartridge gun apply Rigitone Vario 60 joint filler ensuring that the joint is filled to

the full depth of the board. Leave to dry for minimum 50 minutes before striking off excess jointing material.

Protection of edges/ corners: Reinforce external angles, stop ends, etc. with specified edge/ angle bead.

Finishing: 24 hours after joint filling is completed finish board joints with an application of Gyproc Easi-Fill ensuring that board perforations remain clear. Lightly sand when dry to leave a smooth seamless surface.

Screw depressions: Fill with Gyproc Easi-Fill to give a flush surface. Minor imperfections: Lightly sand jointing and spotting to remove any minor imperfections. 681A SKIM COAT PLASTER FINISH: (Hand applied only): - Manufacturer and reference: British Gypsum, Thistle Multi-Finish. Thickness: 2mm. - Pre-Treatment: Thistle Bond-IT (Glasroc H TILEBACKER & Gyproc Moisture resistant grade

plasterboards), Thistle GypPrime (required for Rigidur H boards to control suction). - Reinforcement: Joints/gaps/internal corners: Any gaps exceeding 3mm pre-filled and joints reinforced using

Gyproc Joint Tape alternatively Thistle ProTape FT50 or FT100 may be used. External corners: Thistle Thin Coat Angle Bead or Thin Coat Mini Mesh Bead. Edges: Thistle Thin Coat Plaster Stop Bead to all door and window surrounds. - Fill and tape all joints except where coincident with metal beads. - Trowel/float to a tight, matt, smooth surface with no hollows, abrupt changes of level or

trowel marks. 695 BEADS/STOPS GENERALLY: - Cut neatly using mitres at return angles. Fix securely using longest possible lengths, plumb,

square and true to line and level, ensuring full contact of wings with background. - After joint compounds/plasters have been applied, remove surplus material while still wet

from surfaces of beads which are exposed to view.

K10


U-value Calculation

Technical Advice CentreEast Leake, LoughboroughLeicestershire LE12 6JT

Tel: 0115 945 [email protected]

Project InformationReference TCE-14751773-UVMF - Graham LloydDate 26th July 2018Client Alicia Cecchini

GenslerAldgate HouseLondonEC3N 1AH

Tel: 0207 0739600

Project HMRC - Cardiff Central Development - Plots 6 & 7Wood StreetCardiffSouth GlamorganCF10 1ES

Construction Type: Wall - Uvalue Element 1 WallElement

Internal surface emissivity : High External surface emissivity : HighLight steel-frame construction - Cold frame or Hybrid type:-

Stud depth, d : 92.0 mm Stud spacing, s (mm) : 600.0 mmFlange width : not exceeding 50mm p : 0.607

Bridge detailsThickness Thermal Thermal PitchAir gaps Conductivity Resistance (º)(Level, Delta U")(mm) (W/mK) (m²K/W)

- - 0.040Outside surface resistance250.0 2.500 0.100Reinforced concrete (2% steel)33.0 - 0.180Airspace, heat flow horizontal, 33 mm thick50.0 0.039 1.28250mm Isover Acoustic Partition Roll (APR 1200)

unbridged suspended in cavity0.150% Steel studs (92.0mm)

92.0 0.043 2.140100mm Isover Acoustic Partition Roll (APR 1200) bridged by Gypframe 92 I 90 studs at 600mm centres

- - -Polyethylene, 0.25 mm15.0 0.250 0.060Gyproc DuraLine- - 0.130Inside surface resistance

U-value = 0.29W/m²K

U-value, Combined Method : 0.295W/m²K (upper/lower limit 3.925 / 2.572m²K/W, dUf 0.0001, dUg 0.0000, dUp0.0000, dUr0.0000, dUrc1 0.0000, dUrc2 0.0000)

Correction factorsMechanical fasteners :- Alpha : 1.60 per m lambda f : 50.0000W/mK nf : 5.550 per m² Af : 10.460mm² All screw lengths - wall studs @ 600mm ccs Delta Uf for Gyproc DuraLine : 0.0001 nf = fasteners per m² Af = fasteners cross-sectional areaAir gaps, Delta Ug = 0.000W/m²K

(Based on the combined method for determining U-values of structures containing repeating thermal bridges)

JPA Designer Version 6.04a1 019Licensed to British Gypsum Limited

Page 1 of 3© JPA Technical Literature Jul 2018

Y:\1-CRM (DATA)\TCE\2018\07 - July\GRAHAM LLOYD\TCE-14751773-UVMF Plot 6 & 7 Central Square.JDP TCE-14751773-UVMF - Graham LloydThis calculation is based on information supplied. The construction must be approved by the Project Design Team or controlling authority before

installation. This calculation must be read in conjunction with current literature at www.british-gypsum.com or www.isover.co.uk. BritishGypsum/Isover products must be installed in accordance with current literature and relevant standards. The environmental conditions used are for

the nearest location available to the project. Properties and suitability of non British Gypsum/Isover products must be verified with the manufacturerprior to installation. Bonded wall lining system identified assumes background suitability - where uncertainty exists an alternative mechanically

fixed lining system should be considered. All solutions assume the background is dry and completely weather tight. Reference must be made toNHBC requirements, e.g. Section 6.1, Appendices 6.1-A and 6.2-B, to ascertain suitability of construction relative to exposure zone.

VapourThickness Thermal Thermal VapourResistance Conductivity Resistance Resistivity(MNs/g)(mm) (W/mK) (m²K/W) (MNs/gm)-- - 0.040 -Outside surface resistance

162.50250.0 2.500 0.100 650.00Reinforced concrete (2% steel)0.0033.0 - 0.180 -Airspace, heat flow horizontal, 33 mm thick0.2550.0 0.039 1.282 5.0050mm Isover Acoustic Partition Roll (APR 1200)

unbridged suspended in cavity0.4692.0 0.043 2.140 5.00100mm Isover Acoustic Partition Roll (APR 1200)

bridged by Gypframe 92 I 90 studs at 600mm centres

500.00- - - -Polyethylene, 0.25 mm0.7515.0 0.250 0.060 50.00Gyproc DuraLine

-- - 0.130 -Inside surface resistance







Condensation Risk Analysis (no account taken of thermal bridges)3 - Dwellings with low occupancyJan

20.0C 58.9%

4.4C 86.5%

Feb (worst)

20.0C 57.9%

4.2C 84.0%

Mar

20.0C 58.1%

5.9C 81.5%

Apr

20.0C 58.5%

8.0C 78.5%

May

20.0C 61.9%

11.1C 78.0%

Jun

20.0C 66.9%

14.1C 78.0%

Jul

20.0C 71.4%

16.0C 78.5%

Aug

20.0C 71.9%

15.9C 79.5%

Sep

20.0C 69.8%

14.0C 82.5%

Oct

20.0C 65.6%

11.1C 84.5%

Nov

20.0C 60.7%

7.3C 85.0%

Dec

20.0C 59.8%

5.4C 87.0%

WorstInterface Dewpoint Vapour Saturated Peak Conden-Cond.Temp. Temp. Pressure V.P. Buildup sation(g/m²)ºC ºC (kPa) (kPa) (g/m²)

1 Outside surface resistance4.4 1.7 0.69 0.83 No

2 Reinforced concrete (2% steel)0.3 in Jan4.8 4.7 0.85 0.86 0 in Jan No

3 Airspace, heat flow horizontal, 33 mm thick

5.5 4.7 0.85 0.90 No4 50mm Isover Acoustic Partition Roll (APR 1200) unbridged suspended in cavity

10.6 4.7 0.85 1.28 No5 100mm Isover Acoustic Partition Roll (APR 1200) bridged by Gypframe92 I 90 studs at 600mm centres

19.2 4.7 0.85 2.23 No6 Polyethylene, 0.25 mm

19.2 11.5 1.35 2.23 No7 Gyproc DuraLine

19.5 11.5 1.35 2.26 No8 Inside surface resistance

Worst case internal / external conditions for graph : 20.0°C @ 57.9%RH / 4.2°C @ 84.0%RH

Scale 1:4

25°C

Internal 57.9%RH20°C

15°C

10°C

5°C External 84.0%RH

0°C

-5°C

76

54

32

InsideRsi=0.13

OutsideRso=0.04







Technical Advice CentreEast Leake, LoughboroughLeicestershire LE12 6JT

Tel: 0115 945 [email protected]

Project InformationReference TCE-14751773-UVMF - Graham LloydDate 26th July 2018Client Alicia Cecchini

GenslerAldgate HouseLondonEC3N 1AH

Tel: 0207 0739600

Project HMRC - Cardiff Central Development - Plots 6 & 7Wood StreetCardiffSouth GlamorganCF10 1ES

Construction Type: Wall - Uvalue Element 2 WallElement

Internal surface emissivity : High External surface emissivity : HighLight steel-frame construction - Cold frame or Hybrid type:-

Stud depth, d : 92.0 mm Stud spacing, s (mm) : 600.0 mmFlange width : not exceeding 50mm p : 0.567

Bridge detailsThickness Thermal Thermal PitchAir gaps Conductivity Resistance (º)(Level, Delta U")(mm) (W/mK) (m²K/W)

- - 0.040Outside surface resistance6.700% Mortar (10.0mm)

140.0 0.500 0.280Blockwork - outer leaf, medium

60.0 - 0.180Airspace, heat flow horizontal, 60 mm thick25.0 0.039 0.64125mm Isover Acoustic Partition Roll (APR 1200)

unbridged suspended in cavity0.150% Steel studs (92.0mm)

92.0 0.043 2.140100mm Isover Acoustic Partition Roll (APR 1200) bridged by Gypframe 92 I 90 studs at 600mm centres

- - -Polyethylene, 0.25 mm12.5 0.300 0.042Glasroc H TILEBACKER- - 0.130Inside surface resistance

U-value = 0.35W/m²K

U-value, Combined Method : 0.351W/m²K (upper/lower limit 3.435 / 2.078m²K/W, dUf 0.0001, dUg 0.0000, dUp0.0000, dUr0.0000, dUrc1 0.0000, dUrc2 0.0000)

Correction factorsMechanical fasteners :- Alpha : 1.60 per m lambda f : 50.0000W/mK nf : 5.550 per m² Af : 10.460mm² All screw lengths - wall studs @ 600mm ccs Delta Uf for Glasroc H TILEBACKER : 0.0001 nf = fasteners per m² Af = fasteners cross-sectional areaAir gaps, Delta Ug = 0.000W/m²K

(Based on the combined method for determining U-values of structures containing repeating thermal bridges)







VapourThickness Thermal Thermal VapourResistance Conductivity Resistance Resistivity(MNs/g)(mm) (W/mK) (m²K/W) (MNs/gm)-- - 0.040 -Outside surface resistance

7.00140.0 0.500 0.280 50.00Blockwork - outer leaf, medium0.0060.0 - 0.180 -Airspace, heat flow horizontal, 60 mm thick0.1325.0 0.039 0.641 5.0025mm Isover Acoustic Partition Roll (APR 1200)

unbridged suspended in cavity0.4692.0 0.043 2.140 5.00100mm Isover Acoustic Partition Roll (APR 1200)

bridged by Gypframe 92 I 90 studs at 600mm centres

500.00- - - -Polyethylene, 0.25 mm0.6312.5 0.300 0.042 50.00Glasroc H TILEBACKER

-- - 0.130 -Inside surface resistance







Condensation Risk Analysis (no account taken of thermal bridges)3 - Dwellings with low occupancyJan

20.0C 58.9%

4.4C 86.5%

Feb (worst)

20.0C 57.9%

4.2C 84.0%

Mar

20.0C 58.1%

5.9C 81.5%

Apr

20.0C 58.5%

8.0C 78.5%

May

20.0C 61.9%

11.1C 78.0%

Jun

20.0C 66.9%

14.1C 78.0%

Jul

20.0C 71.4%

16.0C 78.5%

Aug

20.0C 71.9%

15.9C 79.5%

Sep

20.0C 69.8%

14.0C 82.5%

Oct

20.0C 65.6%

11.1C 84.5%

Nov

20.0C 60.7%

7.3C 85.0%

Dec

20.0C 59.8%

5.4C 87.0%

WorstInterface Dewpoint Vapour Saturated Peak Conden-Cond.Temp. Temp. Pressure V.P. Buildup sation(g/m²)ºC ºC (kPa) (kPa) (g/m²)

1 Outside surface resistance4.4 1.7 0.69 0.84 No

2 Blockwork - outer leaf, medium5.7 1.9 0.70 0.91 No

3 Airspace, heat flow horizontal, 60 mm thick

6.5 1.9 0.70 0.97 No4 25mm Isover Acoustic Partition Roll (APR 1200) unbridged suspended in cavity

9.4 1.9 0.70 1.18 No5 100mm Isover Acoustic Partition Roll (APR 1200) bridged by Gypframe92 I 90 studs at 600mm centres

19.2 1.9 0.70 2.23 No6 Polyethylene, 0.25 mm

19.2 11.5 1.35 2.23 No7 Glasroc H TILEBACKER

19.4 11.5 1.35 2.25 No8 Inside surface resistance

Worst case internal / external conditions for graph : 20.0°C @ 57.9%RH / 4.2°C @ 84.0%RH

Scale 1:3

25°C

Internal 57.9%RH20°C

15°C

10°C

5°C External 84.0%RH

0°C

-5°C

76

54

32

InsideRsi=0.13

OutsideRso=0.04







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technical information document - british gypsum

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