ravenstone hall - bonser building...

Ravenstone Hall K10 Specification Issued to Malcolm Dyke Issued by David Robinson [email protected] 07776 392 110 Project & Specification Manager

Rev. Comments Date Revised by

For Discussion 19.08.2014

A 08.09.2014 DR

Ravenstone Hall Malcolm Dyke K10 Specification [For Approval]

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Table of Contents

101 Swimming Pool Ceiling – Sub-Grid & Suspension Grid

102 Swimming Pool Ceiling – Lining & Plaster Finish

103 Swimming Pool Walls – Lining & Plaster Finish

104 Shower & Changing Room Walls

105 Games Room & Plant Room Walls

106 Swimming Pool to Games Room Partition

107 Ceilings (excluding pool area)


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101 SWIMMING POOL CEILING SYSTEM Metal Framed Suspended Sub-grid & Ceiling System; Treated Components.

Specification Ref: Ravenstone Hall.

RICHTER SYSTEM®: System 10.2 / 9.2

All components in accordance with BS EN 13964:2004, Table 7 and 8 Class C. Corrosion class minimum C4.

Performance criteria: RICHTER SYSTEM®: - System 10.2; Profiles supported from existing structural UB‟s span web to web.

Maximum Load: 30 Kg/m²

Maximum Span: 3200mm

Deflection Limit: l/500 @ 1000mm centres (Safety factor of 1.35 against flexural torsion buckling & 1.0 against deflection

under own weight). Linings: 1 x 12.5mm Knauf Aquapanel & RICHTER SYSTEM®: CD 9.2 grid system (25Kg/m²).

SUB-GRID:

Suspension System: Span 146mm x 40mm x 1.0mm RICHTER SYSTEM®: IW-profiles span web to web on existing UB‟s. Form perimeter detail using RICHTER SYSTEM®: UA 100 Cleats. Secure UA 100 Cleats into UB web with suitable fixings @ 1000mm centres. IW-profiles fix using 4nr RiDa® Tek pan head jack point screws into profile and suitable fixings into web of existing UB‟s. To provide restraint to the top flange of the IW-profiles at mid-point on each span use RICHTER SYSTEM®: 30/30 slotted angle section; secure with 1 nr RiDa® Tek pan head jack point screws into top flange. CEILING GRID:

Structural Soffit: System 10.2 Profiles fixed between existing UB‟s.

Suspension System: Suspension depth: TBC: Nonius system – minimum hanger classification 200 N. Hangers: Varies upon suspension depth. Nonius upper component (1) connected to Nonius SYTRA hanger (3) with 2nr adjustment clips (2). Grid: CD primary channels (8) @ 900mm centre (A) (max). Hangers @ 1000mm centres (B) (max). CD panel mount channels @ maximum 300mm (E) Upper & Lower CD profile connected with the CD/CD section connector (5). CD straight connector to extend primary & panel sections (8). Perimeters: UD 28/27 Perimeter Trim (7).

Other Requirements: All site cut ends and screws other than board fixing screws should be painted out with RICHTER SYSTEM® touch-up paint prior to boarding. Up stands / perimeters as standard details – confirmation on receipt of section drawings. Ensure RICHTER SYSTEM®: CD 9.2 is suspended centrally from the IW-Profiles: use RICHTER SYSTEM®: I-stud flange clamp – deep. This specification to be read in conjunction with those clauses specified Systems constructed in accordance with BS 8212:1995 – Code of Practice for dry lining and partitioning using gypsum plasterboards. BS 8000: Part 8:1989 Workmanship on building sites.


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102 SWIMMING POOL CEILING SYSTEM Linings and Plaster Finish. Board manufacturer: Knauf Drywall Kemsley Fields, Business Park, Sittingbourne, Kent, ME9 8SR Tel: 01795 424 499 Fax: 01795 428 651 Email: [email protected] Web: www.knaufdrywall.co.uk Reference: Suspended ceiling system, to be fully constructed with components manufactured and supplied by Knauf Richter Systems Structural Soffit: Structural Steel Beams with Knauf Richter sub-grid Fire resistance of complete assembly to BS 476: Parts 20 and 22: Integrity/insulation (minutes): N/A Suspension system:- All components to be manufactured with pre-coated galvanised profiles, to comply with EN13964, products with a continuously hot-dip metal coating Z100 - an additional 20 micron organic coating per face. Lining(s): 1 x 12.5mm Aquapanel Internal Cement Board Cavity Insulation: N/A Fixings: (Knauf Aquapanel maxi Screws SN) – evened out with Aquapanel Exterior Joint Filler - grey. Screw edge distance >=15mm Screw centres <=250mm Jointing: Joints filled with Aquapanel Exterior Joint Filler - grey, and reinforced with Aquapanel Tape (10cm) Finishing: Hand or spray apply 1

st coat of Aquapanel Interior Skim and level with a spatula, allow to dry, typically

12-24hrs, apply 2nd

coat and level with a spatula, allow to dry, Sand out any imperfections on the surface with 120 grit sand paper to a smooth finish. Suitable paint finishes being in accordance with DIN EN 13300 and BS EN 11998. Refer to Paint Manufacturer’s recommendation for application area. Other requirements: All cut ends and screw junctions must be post painted during installation with polymer paint (by others). Installation to be in accordance with Knauf recommendations. Additionally the following general/special notes can be given:

Built-in units such as lamps and ventilation extractors may load the framework in terms of its bearing capability – consideration of reducing framework to be considered.

in rooms with continuous high levels of damp or chemical contamination such as commercial kitchens, swimming pools, saunas or chemical laboratories, use profiles with corrosion protection

a load case of internal pressure is not taken into account in the above construction information

the ceiling void must remain free from condensation

seal any connection to other building elements to prevent leakage

When connecting to other walls (or building elements) decouple the ceiling to allow flexibility for movement and eliminate stress.

expansion joints are included at maximum 15 m intervals

Fasten the hanger of the framework with suitable approved ceiling fixings.

Method Statement – Board/Finish Knauf Aquapanel Interior Cement Board Align the first Aquapanel Interior Cement Board carefully, perpendicular to the supporting profile. Screw the panel to the framework using Aquapanel Maxi Screws (material requirement 25 pcs/m

2), 15mm from board edge and 250mm

centres. The centre space between the supporting profiles is 300mm.

AQUAPANEL Maxi Screw SN

AQUAPANEL Maxi Screw SN has been specially developed for fixing AQUAPANEL Cement Board on to timber and

metal frameworks (metal thickness from 0.6 to 0.7mm). These screws have a needle point and a countersunk head.

The screws are installed flush so that the screw heads are level with the plane of the board. Screw spacing ≤ 250mm. Distance from edge > 15 mm. The use of screwdrivers with depth control is recommended.


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AQUAPANEL Exterior Joint Filler – Grey

AQUAPANEL Joint Filler Grey into approx. 3.4 l of cold, clean water. We recommend the use of a 600 rpm stirring

machine. Use a clean mixing container and mixing tool.

Processing

Tools: Float/smoothing trowel/joint knife

Fill joints, place AQUAPANEL Tape and press in with a trowel. Allow the previous coating to dry or harden before

applying another coat if required. Also cover the screw heads etc.

Rectify any slight unevenness with a hand/swivel pole sander.

Clean tools and equipment immediately after use with water.

Joints: approx. 0.7 kg/m2

Working time

The material begins to harden approx. 45 minutes after stirring. Dirty mixing containers and tools, and high

temperatures or wind can shorten the working time. Do not use the material once it begins to stiffen.

Ceiling joint: approx. 18 minutes/m2 (incl. installation, screws and laying the joint tape).

Working temperature/climate AQUAPANEL Exterior Joint Filler Grey should only be applied to AQUAPANEL Cement Board panels once they have acclimatised to the ambient climatic conditions. The material, ambient and background temperature must not fall below +5°C.


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103 SWIMMING POOL WALL LININGS Linings and Plaster Finish. Board manufacturer: Knauf Drywall Kemsley Fields, Business Park, Sittingbourne, Kent, ME9 8SR Tel: 01795 424 499 Fax: 01795 428 651 Email: [email protected] Web: www.knaufdrywall.co.uk Background: Pre-treated SW timber battens, minimum fixing face 60mm, fixed to solid background at maximum 600mm centres. Where fixings are to be installed through the exterior wall insulation system, follow the insulation manufacturer‟s instructions. Lining(s): 1 x 12.5mm Aquapanel Internal Cement Board Fixings: (Knauf Aquapanel maxi Screws SN) – evened out with Aquapanel Exterior Joint Filler - grey. Screw edge distance >=15mm Screw centres <=250mm Jointing: Joints filled with Aquapanel Exterior Joint Filler - grey, and reinforced with Aquapanel Tape (10cm) Finishing: Hand or spray apply 1

st coat of Aquapanel Interior Skim and level with a spatula, allow to dry, typically

12-24hrs, apply 2nd

coat and level with a spatula, allow to dry, Sand out any imperfections on the surface with 120 grit sand paper to a smooth finish. Suitable paint finishes being in accordance with DIN EN 13300 and BS EN 11998. Refer to Paint Manufacturer’s recommendation for application area. Other requirements: All cut ends and screw junctions must be post painted during installation with polymer paint (by others). Installation to be in accordance with Knauf recommendations. Additionally the following general/special notes can be given:

Built-in units such as lamps and ventilation extractors may load the framework in terms of its bearing capability – consideration of reducing framework to be considered.

in rooms with continuous high levels of damp or chemical contamination such as commercial kitchens, swimming pools, saunas or chemical laboratories, use profiles with corrosion protection

a load case of internal pressure is not taken into account in the above construction information

the ceiling void must remain free from condensation

seal any connection to other building elements to prevent leakage

When connecting to other walls (or building elements) decouple the ceiling to allow flexibility for movement and eliminate stress.

expansion joints are included at maximum 15 m intervals

Fasten the hanger of the framework with suitable approved ceiling fixings.

Method Statement – Board/Finish Knauf Aquapanel Interior Cement Board Align the first Aquapanel Interior Cement Board carefully, perpendicular to the supporting profile. Screw the panel to the framework using Aquapanel Maxi Screws (material requirement 25 pcs/m







AQUAPANEL Exterior Joint Filler – Grey

AQUAPANEL Joint Filler Grey into approx. 3.4 l of cold, clean water. We recommend the use of a 600 rpm stirring

machine. Use a clean mixing container and mixing tool.


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Tools: Float/smoothing trowel/joint knife

Fill joints, place AQUAPANEL Tape and press in with a trowel. Allow the previous coating to dry or harden before

applying another coat if required. Also cover the screw heads etc.

Rectify any slight unevenness with a hand/swivel pole sander.

Clean tools and equipment immediately after use with water.

Joints: approx. 0.7 kg/m2

Working time

The material begins to harden approx. 45 minutes after stirring. Dirty mixing containers and tools, and high

temperatures or wind can shorten the working time. Do not use the material once it begins to stiffen.

Ceiling joint: approx. 18 minutes/m2 (incl. installation, screws and laying the joint tape).

Working temperature/climate AQUAPANEL Exterior Joint Filler Grey should only be applied to AQUAPANEL Cement Board panels once they have acclimatised to the ambient climatic conditions. The material, ambient and background temperature must not fall below +5°C.


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104 SHOWER & CHANGING AREA WALL LININGS

Board manufacturer: Knauf Drywall Kemsley Fields, Business Park, Sittingbourne, Kent, ME9 8SR Tel: 01795 424 499 Fax: 01795 428 651 Email: [email protected] Web: www.knaufdrywall.co.uk Background: Pre-treated SW timber battens, minimum fixing face 60mm, fixed to solid background at maximum 600mm centres. Where fixings are to be installed through the exterior wall insulation system, follow the insulation manufacturer‟s instructions. Lining(s): 1 x 12.5mm Aquapanel Internal Cement Board Fixings: Knauf Aquapanel maxi Screws SN Screw edge distance >=15mm Screw centres <=250mm Jointing: Not required Finishing: Tiling [by others] maximum 50kg/m² fixed in accordance with manufacturer‟s instructions Method Statement – Board Knauf Aquapanel Interior Cement Board Align the first Aquapanel Interior Cement Board carefully, perpendicular to the supporting profile. Screw the panel to the framework using Aquapanel Maxi Screws (material requirement 25 pcs/m








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105 GAMES ROOM WALL LININGS System type:

Manufacturer: Knauf Drywall, Kemsley Fields Business Park, Sittingbourne, Kent, ME9 8SR. Tel: 01795 424499. Fax: 01795 428651. Email: [email protected]

Framing: Background: Foamglas® Insulation Slabs bonded to existing masonry

Plasterboard Linings: Boarding: 1 x 15mm Knauf Moisture Panel to one side.

Fixing: Bonded to insulation using Foamglas® PC56 Adhesive (in accordance with Foamglas® installation instructions) Finishing:

Tape and Joint: Taped and Jointed for a Seamless finish using Knauf Jointing Products as per clause 471 Primer/Sealer: One coat of Knauf Wallboard Primer applied immediately after taping and Jointing. Skim Finish: Taped & skimmed with Knauf Finishing Plaster as clause 680. General: To be installed in accordance with Knauf Drywall‟s recommendations and British standards BS

8212-1995 and BS 8000-8:1994. Notes:


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106 PARTITION DIVIDING SWIMMING POOL & GAMES ROOM

System type: Manufacturer: Knauf Drywall, Kemsley Fields Business Park, Sittingbourne, Kent, ME9 8SR.

Tel: 01795 424499. Fax: 01795 428651. Email: [email protected] Reference: Knauf detail ref: K10 126 101-107 Construction: Partition Width: 100mm (excluding finishes) Framing: Stud configuration: 70mm Knauf Acoustic ‘C’ Studs (0.6 gauge) 400mm centres Head/Floor Channels: 72mm Knauf „U‟ Channel Fixings into substrates: Knauf Nailable plugs at maximum 600mm centres. Plasterboard Linings: Boarding: 1 x 15mm Knauf Moisture Panel to room side. 1 x 12.5mm Knauf Aquapanel

Internal Cement Board to pool side Horizontal board joints: Knauf Flat Fixing Plate required Fixings: Knauf Drywall Screws as clause 590 Perimeter Sealing: Two continuous beads of Knauf Sealant as clause 515 Cavity Insulation: Thickness/type: 50mm Knauf Earthwool Acoustic Roll (with Ecose® Technology) Finishing: Tape and Joint: Taped and Jointed for a Seamless finish using Knauf Jointing Products as per clause

471 Primer/Sealer: One coat of Knauf Wallboard Primer applied immediately after taping and Jointing. Skim Finish: Taped & skimmed with Knauf Finishing Plaster as clause 680. General: To be installed in accordance with Knauf Drywall‟s recommendations and British

standards BS 8212-1995 and BS 8000-8:1994. Notes:


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107 MF CEILING SYSTEM TO GAMES ROOM

System type:

Manufacturer: Knauf Drywall, Kemsley Fields Business Park, Sittingbourne, Kent, ME9 8SR. Tel: 01795 424499. Fax: 01795 428651. Email: [email protected]

Reference: Knauf detail ref: K10 225 101-105 Construction:

Head condition: Existing structure

Suspension System:

Suspension Hangers: Knauf Soffit Cleats fixed to either Knauf Strap Hanger or 25x25mm Knauf Angle Section at 1200mm centres

Primary support channel: Knauf MF Primary Support Channels to be located at 1200mm centres Ceiling channels: Knauf MF Ceiling Channels to be located at 400mm centres Connecting Clips: Knauf MF Connecting Clips to be fixed at intersection between Knauf MF Primary Support

Channel and Knauf MF Ceiling Channels. Note: Secondary fix with Knauf Waferhead screws of Knauf MF Ceiling Channels to Knauf MF Primary Support Channels of where system is likely to be subjected to ceiling flex caused by room airtightness.

Fixings into substrates: Knauf Nailable Plugs or similar approved

Plasterboard Linings: Boarding: 15mm Knauf Moisture Panel fixed to underside of Knauf MF Ceiling Channels.

Fixings: Knauf Drywall screws as per clause 590, at 230mm centres reduced to 150mm at the ceiling perimeter

Perimeter Sealing: Continuous beads of Knauf Sealant as clause 515 and/or Knauf Intumescent and Acoustic Mastic as clause 340 to suit project needs

Cavity Insulation:

Thickness/type: Not required Finishing:

Tape and Joint: Taped and Jointed for a Seamless finish using Knauf Jointing Products as per clause 471. [Use Knauf Paper Joint Tape]

Primer: One coat of Knauf Wallboard Primer applied immediately after taping and Jointing. Skim Finish: Taped & skimmed with Knauf Finishing Plaster as clause 680. General: To be installed in accordance with Knauf Drywall‟s recommendations and British standards BS

8212-1995 and BS 8000-8:1994 The MF system has been designed based on ‘self-weight’ only basis, confirmation of

any additional loadings would be required to ensure system performance. Notes:


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405 PLASTERBOARD GENERAL

– Knauf Plasterboard to BS EN 520, types A, D, F, I, R, H1, H2, with exposed surface and edge profiles suitable to receive the specified finish.

408 STANDARD PLASTERBOARD

– Knauf Wallboard to BS EN520, type A is plasterboard with a face to which suitable gypsum plasters or decoration may be applied.

409 IMPACT RESISTANT PLASTERBOARD

– Knauf Impact Panel to BS EN520, type A, D, F, I and R is designed for where higher strength and higher surface hardness is required.

– Knauf Performance Plus to BS EN520, type A, D, F, I, R and H1. Product offers versatility in use for acoustic, moisture, fire and impact resistance and can be applied to residential and commercial schemes.

410 MOISTURE RESISTANT PLASTERBOARD

– Knauf Moisture Panel to BS EN520, type A, H2 are types of board which have additives to reduce the water absorption rate.


411 SOUND RESISTANT PLASTERBOARD

– Knauf Soundshield Plus to BS EN520, type A and D has a controlled density which enables improved performance in certain applications.

– Knauf Sound Panel, type A and D offers enhanced level performance and greater density making it ideal for residential applications.

– Knauf Plank, type A, a 19mm thick board for acoustic enhancement. – Knauf Performance Plus to BS EN520, type A, D, F, I, R and H1. Product offers versatility in use for acoustic,

moisture, fire and impact resistance and can be applied to residential and commercial schemes. 412 FIRE RESISTANT PLASTERBOARD

– Knauf Fire Panel to EN520, type A and F has additives within the gypsum core that improve core cohesion at high temperatures and must pass the test set out in EN520, section 5.10

– Knauf Core board, type A, D, F, I and R, specifically designed for Knauf Shaftwall system. Offers high level of fire and moisture resistance.


413 VAPOUR RESISTANT PLASTERBOARD

Knauf Vapour Panel to BS EN 520 & BS EN 14190, type A and has metallised polyester foil to create an effective vapour barrier to limit moisture diffusion.

Support System: 455 METAL STUD FRAMING

– Install using components, accessories and methods recommended by Knauf Drywall. – 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/abutments. – Accurately form openings to receive door sets using sleeved/ boxed metal studs and/or suitable timber

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

345 ADDITIONAL SUPPORTS FOR PARTITION HEADS

– Provide or ensure provision of accurately positioned and securely fixed framing to receive partition heads.


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350 JOINTS

– Between tapered edges of boards to be lightly butted. Leave a maximum 3mm gap where cut/unbound edges occur.

315 JUNCTIONS

– Between Knauf Partitions and Knauf Independent Wall Linings: Where board linings are installed prior to partitions, include a Knauf „C‟/‟‟I‟ stud on centre line of each partition abutment. Where acoustic detailing is required – consult flanking transmission details.

355 ADDITIONAL SUPPORTS FOR FIXTURES AND FITTINGS

– Provide or ensure provision of accurately positioned and securely fixed framing to support fixtures, fittings and services. Consult Knauf noggin details to suit need. After fixing Knauf Plasterboards, mark positions of framing for following trades.

361 HORIZONTAL JOINTS

– Will not be permitted in surfaces exposed to view except where height of wall exceeds maximum available length of board. Agree positions of joints where not specified. Horizontal joints must be backed with Knauf Flat Fixing Plate or Knauf Fixing Channel. Follow Knauf Drywall standard details.

365 ADDITIONAL SUPPORTS FOR DEFLECTION HEADS, 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 Knauf Drywall‟s recommendations. Where a deflection head occurs, additional framing will be required below the head track in the form of Knauf Flat fixing plate to allow the plasterboard to reduced fixing centres around the perimeter.

– Where acoustic treatment consideration is required, consult Knauf Drywall for appropriate head detailing. Fixings: 590 FIXING PLASTERBOARD TO METAL SUPPORTS

– Fix securely to all supports, working from the centre of each board using Knauf Drywall Screws at the following maximum centres:

– Partition/wall linings: 300mm centres, reduced to 200mm at external angles unless otherwise stated. – Ensure minimum 10mm penetration into metal. – Knauf Easybuild system: 400mm centres, reduced to 200mm at the external angles. – Ceilings: 230mm centres, reduced to 150mm at board ends and at lining perimeters. – Position screws not less than 10mm from the edge of the board. – Set heads in a depression; do not break paper or gypsum core

591 FIXING KNAUF AQUAPANEL INTERIOR

– Fix securely to all supports at the following centres: Partitions/wall linings 250mm centres. – Use 25mm Knauf Maxi Screws if fixing into metal studs, use 40mm Knauf Aquapanel screws if fixing into

timber studs. – Position screws not less than 15mm from the edge of the board.

625 FIXING INSULATION BACKED PLASTERBOARD WITH ADHESIVE DABS

– In addition to the requirements of clause 620, secure each boards to the background with min. 2 no. Knauf Nailable Plugs.

Insulation: 331 GLASS FIBRE INSULATION

– Material: Knauf Earthwool Acoustic Roll (with Ecose Technology) – Manufacturer and reference: Knauf Insulation – Thickness: 25mm to 100mm (nominal) to achieve required sound insulation. – Use widest practical widths of insulation. Closely butt all joints leaving no gaps.


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495 ROCK 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 timber battens or Self-Adhesive “Stick Pins”.

500 GLASS OR ROCK MINERAL WOOL INSULATION ACROSS METAL SUSPENDED CEILING FRAMING

– Use widest practical widths of insulation. Fit securely with closely butted joints leaving no gaps. 545 CAVITY BARRIERS WITHIN CEILING VOIDS

– Fire resistance to BS 476: Part 20: Integrity/Insulation (minutes) - as required – Material: Wire reinforced mineral wool not less than 50mm thick. – Fixing: Secure wing methods recommended by barrier manufacturer.[By others] – Unless shown otherwise, install barriers to subdivide the ceiling void into areas not exceeding 20 metres

square. – Fix securely at perimeters and joints, ensuring permanent stability and continuity with no gaps, to provide a

complete barrier to smoke and flames. Accessories: 471 KNAUF TAPED SEAMLESS FINISH

– Jointing compounds: by Knauf Drywall o Knauf Joint Filler o Knauf Multifill o Knauf Ready Mix Lite Easy Sand o Knauf Ready Mix Joint Cement o Knauf Uniflot (Apertura range)

– Lightly sand cut edges of boards to remove paper burrs. – Reinforce all edges and external angles with Knauf Corner Flex Tape. – Fill all joints, gaps and internal angles with Knauf Jointing Compound and cover with continuous lengths of

Knauf Joint Tape, fully bedded. – When set, cover all joints, gaps and angles 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 and after joint, angle and spotting treatments have dried, apply surface finish to give a

continuous consistent texture to surface of boards. – Surface finish: Apply 1 coat Knauf Wallboard Primer.

680 SKIM COAT PLASTER FINISH

– Manufacturer and reference: Knauf MP Finish by Knauf Drywall – Thickness: 2 - 3mm. – 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. – Moisture resistant boards require a pre-treatment with Knauf Betokontakt prior to a skim finish being applied.

340 ACOUSTIC AND INTUMESCENT MASTIC

– Manufacturer and reference: Knauf Intumescent & Acoustic mastic, by Knauf Drywall – Location: Two continuous beads applied above deflection head track and substrate perimeter, used at

junctions between partition(s) and adjoining structure for fire walling systems, and at penetration openings. – Apply as a continuous bead to clean, dry, dust-free surfaces, leaving no gaps. – After application of mastic, bulk fill gaps in excess of 6mm between floor and underside of plasterboard using

Knauf joint compound. Note: Special attention should be given to buildings were there is a requirement for an Airtight seal. The air tight line should be agreed prior to installation being undertaken.


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515 SEALANT

- Sealant: Knauf Sealant. – Location: To perimeter junctions with walls, floors, and ceilings and around openings., sealing gaps and air

paths – Before fixing boarding, apply as a continuous bead to clean, dry, dust-free surfaces, leaving no gaps. After

application of sealant, fill gaps greater than about 6mm with Knauf Jointing Compound. Note: Special attention should be given to buildings were there is a requirement for an Airtight seal. The air tight line should be agreed prior to installation being undertaken. 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.

555 FIRE STOPPING

– Seal any gaps at junctions of linings and cavity barriers with perimeter abutments, service penetrations, etc. using tightly packed mineral wool or Knauf Intumescent & Acoustic Mastic, to prevent penetration of smoke and flame.

Workmanship: 310 WORKMANSHIP GENERALLY

- Plasterboard: To BS EN520 with exposed surface suitable to receive direct decoration - Fixing, jointing and finishing materials and accessories, to be as recommended by Knauf Drywall. - Operatives to be properly trained for partitioning and dry lining work. - Fix boards only in areas, which have been made weather tight. In order to prevent frost damage and moisture

ingress. - 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 giving flush, smooth, flat surfaces free from bowing and abrupt changes of level. Do not use damaged boards.

– Handle and store materials in accordance with BS 8212, section 5. Do not use damaged boards. 325 PREPARATION OF SOLID BACKGROUNDS

- Complete all cutting, chasing, plugging and making good. - Remove all loose material by brushing thoroughly. - Remove all oil, grease, wallpaper, etc. by scrubbing with water and detergent. Rinse with clean water and

allow drying. - For adhesive fixed wall linings, adjust suction of background as necessary using primers or bonding agents

recommended for the purpose by Knauf Drywall. 380 MOVEMENT JOINTS FOR DRY WALL SYSTEMS

Note: Where continuous run of imperforated partitions/linings exceed 10000mm, it is recommended to control movement joint.

Manufacturer and reference: Knauf Movement control joint by Knauf Drywall - Maximum movement: 7mm - Fix through each flange using 13mm corrosion resistant staples at 150mm centres. Seal ends with Knauf

Sealant or acrylic caulk. - Support edges of plasterboard either side of joint with a continuous vertical line of adhesive dabs. - Refer to the „Knauf Drywall Manual‟ for application details. - Location should be agreed by the project Architect.


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385 SERVICE PENETRATIONS:

- The dry lining contractor must liaise with other contractors to ensure that fire resistance and other specified performance requirements are not impaired by service penetrations.

- In particular: Fire Dampers. - Form framed openings accurately for grouped services, ducts, etc. allowing for Fire Batts / Fire Stopping

material to be installed [supplied and confirmed by others to meet performance requirement. - Provide insulation backings or Knauf Putty Pads to recessed electrical outlets and switches as recommended

by Knauf Drywall 560 JOINTS BETWEEN BOARDS:

- Tapered edged plasterboards: Lightly butted. Leave a maximum 3mm gap where cut/unbound edges occur. 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 – Refer to Knauf Installation procedure.

570 HORIZONTAL JOINTS:

- Horizontal joints are not recommended in surfaces exposed to view except where the height of partition/lining exceeds the maximum available length of board. Agree positions of joints prior to commencement of works

- For two layer boarding, stagger joints between layers by at least 600mm. - Ensure that additional framing supports edges of boards. For two layer boarding framing must support the

outer layer. 305 COMPLIANCE WITH PERFORMANCE REQUIREMENTS:

- Provide Knauf Drywall laboratory test/assessment report(s) for: Acoustic performance, Fire Resistance and stability requirements - All materials, components and details used must be in accordance with the test/assessment report(s). If

discrepancies arise, obtain instructions from Knauf Drywall. 375 NEW WET LAID BASES

- Provide or ensure provision of a continuous strip of bituminous felt dpc or other approved material under partitions/free-standing wall linings, cut to the full width of the partition/lining.

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.

475 METAL FURRINGS FOR WALL LININGS

– Install using components, accessories and methods recommended by Knauf Drywall. – Set out Metal Furrings vertically at the specified centres and adjacent to angles, openings, movement joints,

etc. Maintain centres of Metal Furrings across openings. Bed in 200mm long Knauf Plasterboard Adhesive dabs at each end of the Metal Furring and thereafter at 450mm centres. Bed short lengths of Metal Furring horizontally to provide continuous support to top and bottom edges of boards.

– Accurately align all Metal Furrings to a true, vertical plane. Install additional Metal Furrings where necessary to accept junctions with partitions. Use a continuous line of Knauf Plasterboard Adhesive to ensure that there are no gaps across the cavity.

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