building contractor’s manual - encon insulation · 12 floors 13 floors rockwool flexi •...

THE LITTLE RED BOOKBUILDINGCONTRACTOR’S MANUAL

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CONTENTS

3

CONTENTS

WALLS – INTERNALPARTITION Rockwool Flexi . . . . . . . . . . . . . . . . . .20

Acoustic Partition Slab . . . . . . . . . . . .21PARTY Rockliner . . . . . . . . . . . . . . . . . . . . . . .22FLANKING WALL Rockwool Flexi . . . . . . . . . . . . . . . . . .22

Acoustic Partition Slab . . . . . . . . . . . .23Acoustic Party Wall dpc . . . . . . . . . . .23

U VALUESEXTERNAL WALLS Cavity (full fill) . . . . . . . . . . . . . . . . . . .24

High Performance Partial Fill . . . . . . .25Traditional timber frame . . . . . . . . . . .26Timber frame with hanging tiles . . . . .27

PITCHED ROOFS Cold pitched roof . . . . . . . . . . . . . . . .28WARM FLAT ROOF Timber joisted flat roof . . . . . . . . . . . .29

Profiled Metal deck on purlins . . . . . .30Concrete deck, plaster finish . . . . . . . .31

COLD FLAT ROOF Cold flat roof construction . . . . . . . . .32Rafter insulation . . . . . . . . . . . . . . . . .33Semi or exposed upper timber floor .33

OTHER INCLUSIONSCONTACT LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

CONTENTS

FLAT ROOFS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4COLD Rockwool Flexi . . . . . . . . . . . . . . . . . . .5WARM DuoRock . . . . . . . . . . . . . . . . . . . . . . .5

Hardrock . . . . . . . . . . . . . . . . . . . . . . . .5

PITCHED ROOFS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6Rockwool Flexi . . . . . . . . . . . . . . . . . . .7Rockfall . . . . . . . . . . . . . . . . . . . . . . . . .7

CEILINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8Fire Barrier & Easy-Fit Fixing System . . .9

SOFFIT RW5 . . . . . . . . . . . . . . . . . . . . . . . . . . .9DuoRock . . . . . . . . . . . . . . . . . . . . . . . .9Rockwool Flexi . . . . . . . . . . . . . . . . . . .9

FLOORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10GROUND Thermal Rockfloor . . . . . . . . . . . . . . .11

Ground floor U value . . . . . . . . . . . . .11Suspended Dense Beam & Block Floor 11

INTERMEDIATE SlimFloor . . . . . . . . . . . . . . . . . . . . . . .12Rockwool Flexi . . . . . . . . . . . . . . . . . .13

WALLS – EXTERNAL . . . . . . . . . . . . . . . . . . . . . . . .14MASONRY Rockwool Cavity . . . . . . . . . . . . . . . . .15

TCB Cavity Barrier . . . . . . . . . . . . . . .15High Performance Partial Fill . . . . . . . .16Rockclose . . . . . . . . . . . . . . . . . . . . . .16Rockliner . . . . . . . . . . . . . . . . . . . . . . .16

FRAME Rockwool Flexi . . . . . . . . . . . . . . . . . .17High Performance Partial Fill . . . . . . . .17TCB Cavity Barrier . . . . . . . . . . . . . . .17

CURTAIN WALLING Rainscreen Duo-slab . . . . . . . . . . . . . .18SP Firestop Slab . . . . . . . . . . . . . . . . . .18

TWIN SKIN Cladding Roll . . . . . . . . . . . . . . . . . . . .19

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FLAT ROOFS

5

FLAT ROOFS

THE CONTRACTOR’S CHOICE FOR FLAT ROOFS

Roofing contractors looking for the most economic anddependable solution for flat roofs, look to Rockwool.

TOUGH TO BEATRockwool boards are tough enough to walk on duringinstallation. Yet easy to work and cut on site with a saw orsharp knife. No mess. Less waste.

EASY TO FITFewer mechanical fixings make installation of Rockwool boardseven easier.

A1 FOR FIRE SAFETYInsist on Rockwool – classified A1 for fire safety. It’s the highestsafety classification you can get. You won’t find a more firesafesolution to meet today’s stringent fire regulations.

ECONOMICALLY SOUNDMake the sound decision – choose Rockwool. With the excellent acoustic qualities of Rockwool, and ourtechnical expertise, you will meet Part E with confidence.

IMPROVE U VALUES If you need the most economic, reliable solution to help you meetPart L, you can rely on the thermal performance of Rockwool.

THE NATURAL CHOICERockwool insulation is environmentally friendly. Our productssave more energy in application than they take to produce.

COLD ROOFSRockwool Flexi• Patented flexible edge along one side

aids perfect fit between product andtimber joists

• No gaps – eliminates heat loss• No sagging or slumping• Ideal for flat roof applications• Little or no cutting• Suits both 400mm & 600mm centres

WARM ROOFSDuoRock• Economic dual density roofing boards• Excellent thermal, firesafe and

acoustic performance• Manufactured with a high density,

robust top surface • Ideal for mechanically fastened,

ballasted or fully adhered single plymembrane systems

• Also suitable for Torch-on or pour and roll built-up roofingmembranes

• Only one fixing per board – cost effective, most othersystems require 11

Hardrock Dual Density• Roofing Boards with unique dual

density technology• Robust, high density top surface• Excellent point load compressive

resistance• Single thickness solution meets

Thermal Regulations• Ideal for most types of roof deck• Combine with single ply or high performance built-up

roofing systems

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PITCHED ROOFS

7

PITCHED ROOFS

THE CONTRACTOR’S CHOICE FOR PITCHED ROOFS

Roofing contractors seeking the most economic anddependable solution for pitched roofs, need look no furtherthan Rockwool.

THE EASY OPTIONEasy to manage on site. Easy to cut to size. Easy to fit. Easy to see why it’s the contractor’s choice.

A1 FOR FIRE SAFETYInsist on Rockwool – classified A1 for fire safety. It’s the highestsafety classification you can get. You won’t find a more firesafesolution to meet today’s stringent fire regulations.

ECONOMICALLY SOUNDMake the sound decision – choose Rockwool. With the excellent acoustic qualities of Rockwool, and ourtechnical expertise, you will meet Part E with confidence.

IMPROVE U VALUES If you need the most economic, reliable solution to help you meetPart L, you can rely on the thermal performance of Rockwool.


Rockwool Flexi• Patented flexible edge along one side

aids perfect fit between timber rafters• No gaps• No sagging or slumping• Perfect for pitched roof applications• Self-supporting and remains in-situ

before lining out• Breather membrane required

Rockfall• Warm Pitched Roof Insulation system• Effective means of insulating the roof

space at rafter level• Ideal for Mansard application • Allows for flat warm roofs to be

continued through to the pitchedroof area. Adaptable to almost anypitched roof configuration

• Specifically designed for industrial, commercial and domesticprojects

8

CEILINGS

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CEILINGS

Fire Barrier & Easy-Fit Fixing System• Cost effective – vastly reduced

installation time, no need forexpensive nuts & bolts

• Easy-fit fixing system, fixingcompliant with test certificate

• Easily identifiable fixing componentsfor quick on site checks

• Most flexible option to control fire spread

SOFFITRW5• Firesafe solution• Meets Building Regulations• Twin layer application• Suitable for staggered joints when

required

DuoRock• Firesafe solution• Thermal and acoustic performance• Single layered application


aids perfect fit between product and timber rafters

• No gaps• No sagging or slumping• Significant benefits in soffit

applications between timber battens

THE CONTRACTOR’S CHOICE FOR CEILINGS AND SOFFITS

Contractors demand a fast, cost effective solution for ceilingsand soffits. And that’s exactly what Rockwool delivers.

FAST TO FITDecades of continuous product development have madeRockwool systems better designed for quick, simple installation.

SAVE MONEY ON SITEEasy to work and cut on site. Cut down on waste and makeeven the most difficult jobs that much easier to complete.

A1 FOR FIRE SAFETYClassified A1 for fire safety – the highest safety classificationyou can get! Meet today’s stringent fire regulations withRockwool’s firesafe solutions.

ECONOMICALLY SOUNDMake a sound economic decision and choose Rockwool. With the excellent acoustic qualities of Rockwool, and ourtechnical expertise, we deliver the most cost effective way to meet Part E.

IMPROVE U VALUES Need the most economic, reliable solution to help you meetPart L? You can rely on the thermal performance of Rockwool!


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FLOORS

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FLOORS

GROUNDThermal Rockfloor• Tissue faced high compressive

strength slab • Meets both the new Part E and

Part L building regulations • Available in thermal and

acoustic options• Unique economic dual density

insulation for ground floors • Acoustic insulation for separating floors • Offers both rebated and square edge options• Rebated edge ensures no screed seepage or thermal bridging• Excellent compressive strength & load bearing properties• Cost effective – no building paper required under screed• Chemically inert – no need for conduit and easily cut

around services• Can be used under screed or above/below floor slab. Can

take up irregularities in the sub-floor

Ground floor U valueThe two main factors affecting the U value of a ground floor isthe construction type and the external exposed perimeter toarea ratio (P/A). The following tables provide the thickness ofRockwool insulation products for five typical constructions, withvarious P/A ratios, to meet the 0.25W/m2K requirement ofApproved Document L of Building Regulations.

Suspended Dense Beam & Block FloorInsulation between 100mm dense block/25mm levelling screedand 65mm reinforced sand/cement screed or 18mm chipboard.

THE CONTRACTOR’S CHOICE FOR FLOORS

Fast, cost effective solutions to help you meet today’sstringent building regulations and keep installation costspinned to the floor.

EASY TO FITWet or dry installation… concrete or timber floors… Rockwool’sversatility ensures a solution to meet every specification.

SAVE MONEY ON SITERockwool is easy to work and cut on site, saving you money,time and cutting down on waste.

A1 FOR FIRE SAFETYThe core Rockwool material is classified A1 for fire safety – thehighest classification available. Meet the most stringent fire regulations with Rockwool andyou’ll meet them with confidence.

ECONOMICALLY SOUNDRockwool’s inherent sound absorption qualities, and ourtechnical expertise, combine to create a sound solution tosatisfy Part E.

THERMAL PERFORMANCEMake it easier to improve U values and meet the most stringentthermal regulations. Opt for Rockwool and take the simpleoption to meet Part L.

THE NATURAL CHOICERockwool insulation is environmentally friendly. Our productssave more energy in application than they take to produce. Thickness 25mm 30mm 40mm 50mm 60mm 70mm

P/A (m-1)up to & inc

0.12 0.13 0.14 0.17 0.20 0.25

Thickness 80mm 90mm 100mm 110mm 120mmP/A (m-1)

up to & inc0.30 0.40 0.57 0.97 2.50

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FLOORS

13

FLOORS


aids perfect fit with no gaps between the product and supporting framework

• Meets Part E requirements• Fully tested for One hour fire

separations

SOLID FLOORInsulation below 150mm concrete slab

* Note: Compliance requires the provision for min. 25mm edge insulation to all slabon ground floors

INTERMEDIATESlimFloor• Rockwool SlimFloor is the latest

product from Rockwool’s newSoundPro range

• This innovative new flooring producthas been designed specifically for useon concrete separating floors

• Meets the new Robust Details forPart E of the Building Regulations (England and Wales)

• Works on the floating floor principle that both isolatesairborne sound and absorbs walking impact

• Consists of 10mm high-density Rockwool pre-bonded to an18mm C4 moisture resistant chipboard

• The underside of SlimFloor is finished with an aluminium foil facing.

DPM/blinding

Concrete ground bearing slab

Hardcore

Rockfloor insulation

Sand and cement screed

30mm Rockfloor vertical edge insulation*

Thickness 25mm 30mm 40mm 50mm 60mm 70mm


0.18 0.19 0.22 0.26 0.30 0.36

Thickness 80mm 90mm 100mm 110mm 120mm


0.45 0.58 0.78 1.18 2.00

Rockwool SlimFloor – FFT5

Minimum 250 mm in-situ concrete slab

For ceiling treatment, see Robust Details handbook

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WALLS

EXTERNAL

MASONRYRockwool Cavity• BBA approved for all exposure zones• BBA approved for multi-storey

applications• Non combustible – acts as a cavity

barrier• High Density – less prone to damage

on site• Less do’s & don’ts when installing off cuts & at corners• Stonewool knits together eliminating cold bridging• Low cost solution for new masonry cavity walls • No additional acoustic fire stopping products required• Water repellent

TCB Cavity Barrier• Part of the Firepro range• 1/2 hour fire resistance• Meets Approved Document B of

the Building Regulations• For both timber frame and

masonry constructions• No additional weather proofing

required• Designed to be fitted with ease

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WALLS

THE CONTRACTOR’S CHOICE FOR WALLS

If you want the ultimate in performance, combined withproducts designed to make installation easier on site, thenRockwool delivers your best solution for walls.

TOUGH, RESILIENT… YET SO EASYRockwool boards are installed with the minimum of hasslemaking the contractor’s life so much easier. Where there’s a wall there’s a Rockwool way. Whatever the project, alwayslook to Rockwool first for a reliable, convenient solution.

A1 FOR FIRE SAFETYRockwool is classified A1. It’s tried, tested and trusted to be themost firesafe solution you can get for walls. Satisfy today’sstringent fire regulations with Rockwool.

ECONOMICALLY SOUNDDrastically reduce the passage of sound between walls withRockwool. Our comprehensive range of acoustic solutions helpyou to meet Part E with confidence.

IMPROVE U VALUES Improve the thermal performance of the building and saveyourself energy at the same time. Rockwool is the easy answerto improving U values and meeting Part L.


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WALLS

High Performance Partial Fill• Dual density – robust outer surface

reduces risk of damage.• Flexible resilient inner surface –

imperfections can be accommodated• Pattern side outwards to maximise

performance • Non combustible• Stonewool knits together eliminating cold bridging

Rockclose• For closing masonry cavity walls

round opening• Minimises cold bridges• Assessed for a full 30 mins fire

insulation (as required in Scotland)

Rockliner• Most cost effective stonewool

plasterboard laminate on the market• Unique acoustic/thermal isolation

strip, prevents flanking• Is totally inert, so no need for ducting

of cables and pipes• Shark cutting tool for service chasing• Firesafe insulation, will achieve the new Euroclass A1• Site inspection service available to advise & highlight potential

problem areas• The most commonly used insulated lining board in Europe• A complete Acoustic, Fire and Thermal Solution

Rockwool Energy Saver & Rockshield:Installed via specialist contractors. See page 34 for contact information.

17

WALLS

FRAMERockwool Flexi • Patented flexible edge along one side• Perfect fit between the insulation

and the framework• No gaps. Improves acoustic

performance• Fits studs at 400mm or 600mm

centres• Does not slump • No additional fixings required

High Performance Partial Fill • Dual density – robust outer surface

reduces risk of damage.• Flexible inner surface – imperfections

can be accommodated• Pattern side outwards to maximise

performance • Stonewool knits together eliminating

cold bridging• Non combustible

TCB Cavity Barrier• 1/2 hour fire resistance• Meets Approved Document B of the

Building Regulations• For both timber frame and masonry

constructions• No additional weather proofing

required• Designed to be fitted with ease

18

WALLS

19

WALLS

TWIN SKINCladding Roll• Specially developed for lightweight

cladding applications• Satisfies the thermal, fire and

acoustic requirements of roofs andwalls

• Manufactured in a variety ofthicknesses

• Suits virtually any application of a commercial or industrialnature

CURTAIN WALLINGRainscreen Duo-slab• Cost effective – up to 50% fewer

fixings compared to standardstonewool slab

• Robust outer surface designed toprevent over driving of fixings

• Maintains ventilation, slabs do notdeflect as a result of over fixing

• Flexible inner surface, absorbs irregularities of the substrate• Pattern side outwards to maximise performance• Stonewool knits together eliminating cold bridging• Non-combustible

SP Firestop Slab• One product suits all cavity sizes

- no waste• Residue from sites can be used on

subsequent work• Two slab thickness cover most ratings

e.g. 75mm:1 hour 90mm:2 hours• Two fixing brackets cover all cavity

widths up to 400mm• Suitable for both curtain walling and masonry construction• Easily identifiable Rockwool logo on foil• Comes pre-marked to aid cutting• Pre cut service available

Please note: The product is available in two versions:

SP 60 Slab – giving 1 hour fire resistance.

SP 120 Slab – giving 2 hours fire resistance.

20

WALLS

21

WALLS

Acoustic Partition Slab• Approved and certified for a wide

variety of metal and timber studpartition structures

• Optimum thickness of 47mm &67mm to suit standard stud thickness

• Reaches current Building Regs• Self-supporting slab. Does not sag or

slump• No fixing at head of partition• Reduced labour & wastage on site• Cost effective, can be used with standard grade

plasterboard no need to move expensive soundresisting/sound check wallboards

• Easy to cut, detail and handle, and quick to install• Ideal for internal partitions• Can be moved easily to accommodate change of use or owner.• Provides a minimum 30 minute Fire Protection, more with

thicker systems

INTERNAL

PARTITIONSRockwool Flexi • Patented flexible edge along one side• Perfect fit between the insulation


performance• No additional fixings required• Fits studs at 400mm or 600mm

centres• Does not slump

23

WALLS

Acoustic Partition Slab• Approved and certified for a wide

variety of metal and timber studpartition structures

• Optimum thickness of 47mm &67mm to suit standard stud thickness

• Reaches current Building Regs.• Self-supporting slab. Does not sag or slump.• No fixing at head of partition• Reduced labour & wastage on site• Cost effective, can be used with standard grade

plasterboard no need to move expensive soundresisting/sound check wallboards

• Easy to cut, detail and handle, and quick to install• Ideal for internal partitions• Can be moved easily to accommodate change of use or

owner• Provides a minimum 30 minute Fire Protection, more with

thicker systems

Acoustic Party Wall dpc• One piece insulated dpc • Wide enough to cover end of

party wall• Minimises flanking path transmission• Offers one hour fire resistance• Meets acoustic regulations and

robust details criteria• No water penetration

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WALLS

PARTY (FLANKING WALL)Rockliner• Unique acoustic/thermal isolation

strip prevents flanking• Is totally inert, so no need for

ducting of cables and pipes• Shark cutting tool for services

chasing• Firesafe insulation achieving the new

Euroclass A1• A complete acoustic, fire and thermal solution

Rockwool Flexi • Patented flexible edge along one side• Perfect fit between the insulation


performance• Fits studs at 400mm or 600mm

centres• Does not slump • No additional fixings required

25

EXTERNALWALLS

Note: BBA Certificate for Rockwool HP Partial Fill Cavity Slabspermits their use with a minimum 25mm residual cavity up to amaximum building height of 12 metres

U values calculations are based on BS EN ISO 6946 (thecombined method) using stainless steel ties with cross sectionalarea of 12.5mm2

Block type(W/mK)

Light0.18 W/mK

Aircrete0.11W/mK

Internal finish

Insulation (mm)

A B A B

50 – – – 0.35

60 – 0.35 0.33 0.32

65 0.34 0.33 0.32 0.30

75 0.31 0.30 0.29 0.28

Block type(W/mK)

Dense1.13 W/mK

Medium0.51W/mK

Internal finish

Insulation (mm)

A B A B

75 – 0.34 0.35 0.33

Brick outer leaf

Rockwool HP Partial FillCavity Slab

Concrete block inner leaf(see table below)

(A) 13mm plaster(B) 12.5mm plasterboard

on dabs

High Performance Partial fill

24

EXTERNALWALLS

U values calculations are based on BS EN ISO 6946 (the combined method) using stainless steel ties with crosssectional area of 12.5mm2

Block type(W/mK)

Light0.18 W/mK

Aircrete0.11W/mK

Internal finish

Insulation (mm)

A B A B

65 – – 0.35 0.34

75 0.35 0.34 0.32 0.31

80 0.34 0.32 0.31 0.30

90 0.31 0.30 0.29 0.28

100 0.28 0.27 0.26 0.25

Block type(W/mK)

Dense1.13 W/mK

Medium0.51W/mK

Internal finish

Insulation (mm)

A B A B

80 – – – 0.35

90 0.35 0.34 0.34 0.32

100 0.32 0.30 0.31 0.30

Brick outer leaf

Rockwool Cavity (full fill)

Rockwool Cavity

100mm concrete block inner leaf (see table below)

(A) 13mm plaster(B) 12.5mm plasterboard

on dabs

27

EXTERNALWALLS

U values based on BS EN ISO 6946 and allow for 15% timberbridging

Rockwool product type

Thickness(mm)

U value(W/m2K)

Roll 150 0.32

Roll 170 0.29


Thickness(mm)

U value(W/m2K)

Flexi 120 (2 x 60) 0.35

Flexi 140 0.31

Flexi 175 (75 + 100) 0.26

12.5mm Plasterboard

External tiles hanging on battens

Breather membrane

Rockwool Flexi fully fitting depthof studs

Vapour control layer

Timber frame with hanging tiles

26

EXTERNALWALLS

For traditional breathable timber framed wall, Rockwool Ltdrecommend the use of Rockwool Flexi or Rockwool Roll, fullyfilling the void between timber studs.

U values based on BS EN ISO 6946 and allow for 15% timberbridging.


Thickness(mm)

U value(W/m2K)

Roll 150 0.30

Roll 170 0.27


Thickness(mm)

U value(W/m2K)

Flexi 120 (2 x 60) 0.33

Flexi 140 0.29

Flexi 160 (60 + 100) 0.26

Brick outer cladding50mm cavity

Traditional timber frame

Breather membrane

Sheathing boardRockwool FlexiVapour control layer(sealed)

NoggingsPlasterboard

29

WARM FLATROOF

Using DuoRock Roofing Board:

Using Hardrock Dual Density:

U value calculations are based on BS EN ISO 6946 (the combined method).

*Allowances for mechanical fixings which penetrate theinsulation layer

Hardrock thickness (mm) U/m2K 130 140

Bonded membranes 0.25 0.23

*Mechanically fastened (with steel fasteners) – 0.25

DuoRock thickness (mm) U/m2K 130 140



Waterproof finish

Timber deck

VCL

Full height blocking(eaves or verge)

Rockwoolpackedinto verge

Timber joisted flat roof

Non-ventilatedvoid

Duorock or Hardrock

28

PITCHED ROOFS

To minimise heat lossthrough the roof,Rockwool Ltdrecommend the use ofour Rockwool Roll product cross layered between and overjoists. This method minimises the effect of thermal bridgingthrough the timbers and is therefore a more robust solution.The insulation layer between joists is taken as a bridged layer.


Timber sizeSpacing of timber

47x100mm joists@ 400mm c/c

47x100mm joists@ 600mm c/c

Insulation (mm)between joists over joists

U valueW/m2K

U valueW/m2K

100 170 0.16 0.16

Ventilated loft space

Tiled or slated roof

Roofing felt

Use proprietary crossflowventilator or ensure25 mm (min) air gap

Box eaves

Soffit vents

Ensure loft insulationmeets wall insulation

Rockwool Rolllaid betweenand overceiling joists

Plasterboard

Cold pitched roof

31

WARM FLATROOFS




*Allowances for mechanical fixings which penetrate theinsulation layer.







16mm PlasterConcrete deck

Waterproof finish

Rockwool Hardrock/Duorock

SceedVapour control layer VCL

Concrete deck, plaster finish

30

WARM FLATROOFS




*Allowances for mechanical fixings which penetrate theinsulation layer.



*Mechanically fastened (with steel fasteners) 0.27 0.25




Waterproof finish

Profiled Metal deck flat roof on purlins

Rockwool Duorock/Hardrock (see table below)Vapour control layer VCL

Purlin

33

COLD FLAT ROOF

Rafter insulation – Construction: Slate or concrete tiles,battens, counter battens, approved breather membrane,Rockwool RWA45 Slabs between rafters, vapour barrier,plasterboard.

Semi or exposed upper timber floor construction –Construction: 18mm t&g flooring grade chipboard, RockwoolRWA45, Rockwool Flexi or Rockwool Roll installed betweentimber floor joists, 12.5mm plasterboard ceiling

Timber joistsSpacing of timber

Roof joists @400mm c/c


Rockwool insulation type:

Insulation between timber floorjoists (11% timber bridging)

Thickness(mm)

U value(W/m2K)

RWA45 Slab 160 (60 + 100) 0.25

Flexi 175 (75 + 100) 0.24

Roll 200 (2 x 100) 0.22


Rafters @ 400mm c/c

Rafters @ 600mm c/c

Insulation: RWA45 Slab(mm) betweenrafters

U valueW/m2K

U valueW/m2K

200 (2 x 100) – 0.20

220 (2 x 60 + 100) 0.20 0.19

32

COLD FLAT ROOF

Cold flat roof construction – Water proofing layer, ply roofdeck, 50mm vented cavity, Rockwool RWA45 Slab betweentimber roof joists, vcl, 12.5mm plasterboard





Insulation: RWA45 Slab(mm) betweenroof joists

U valueW/m2K

U valueW/m2K

150 (2 x 75) – 0.25

160 (60 + 100) 0.25 0.23

34

CONTACT LIST

35

CONTACT LIST

NORTHERN1 07970 142 8432 00353 868 1986443 07970 142 8284 07970 142 8085 07970 142 819

Fire Protection 07970 142 856

CENTRAL6 07970 142 8057 07970 142 8068 07970 142 842

SOUTHERN9 07970 142 84210 07970 142 84411 07970 142 85412 07970 142 839

Fire Protection 07970 142 817

LONDON AREAS10 07970 142844 / 07970 142854 / 07970 142839

ROCKSHIELD01234 567 890

ENERGYSAVER01234 567 890

YOUR LOCAL ROCKWOOL CONTACT

6

912

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3

4

5

2

London

11

10

7

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Rockwool Limited, Pencoed, Bridgend CF35 6NYTel: 01656 862621 Fax: 0871 222 1784

Email: [email protected]

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