protect reflective technology...bs en iso 6946), they effectively block infra-red radiation and...

CI/SfB (47) Ln6Uniclass Pr_25_57_10_68June 2018

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

REFLECTIVE TECHNOLOGY CONSTRUCTION MEMBRANES

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Low emissivity technologyThe Protect range of Reflective Technologyconstruction membranes utilises high purityaluminium foil to provide low emissivity,radiant barriers. When installed facing intoan unventilated airspace (as defined in BS EN ISO 6946), they effectively blockinfra-red radiation and enhance the thermalperformance of the airspace. This, in turn,improves the overall thermal resistance ofthe wall construction. This provides designflexibility and cost savings when achievingthese more onerous U-value targets.

Emissivity of Protect’s reflective surfaceshas been tested in accordance with BS EN 15976 and thermal resistanceperformance in a wall construction hasbeen tested in accordance with BS EN ISO 8990.

As fabric energy efficiency is becomingincreasingly legislated by BuildingRegulations and Standards, the benefitsof lower energy consumption andtherefore costs to the building occupierare easy to understand.

However, the modern builder needs to findways to construct the dwelling to meetthese standards whilst ensuring that theproperty remains affordable to potentialbuyers.

Building Regulations and Standards setupper limit U-values for constructionelements, but in order to meet the moreonerous fabric energy efficiency targets, a Notional Dwelling specification has beendeveloped which is much more demanding- typical values can be seen below.

Element Upper limit Notional Dwelling Improvementor system value specification value required

Roof 0.20W/m2K 0.13W/m2K 35%Walls 0.30W/m2K 0.18W/m2K 40%Floors 0.25W/m2K 0.13W/m2K 48%Airtightness 10m3/hr/m2 5m3/hr/m2 50%

ApplicationsIn order to meet the onerous fabric energyefficiency targets, a timber frame wall needsto combine thermal efficiency with a flexibleairtightness solution to ensure long-termcompliance whilst minimising the energycosts to the eventual building occupier. Inaddition, the wall panel must alsoeffectively minimise the risk of harmfulcondensation. Timber frame constructionrequires both a breathable membrane onthe outer sheathing or cold side of thepanel, which also provides temporaryprotection against the elements, and an airand vapour control layer (AVCL) on theinternal or warm side of the panel.

As improved airtightness has become morecrucial to modern, energy efficientconstruction, it is now common practice toinclude a batten between the AVCLmembrane and the internal lining board tocreate a circa 25mm deep void to routeservices without having to puncture theAVCL membrane, thus maintaining itsintegrity.

Switching from traditional vapour controlmembranes to Protect VC Foil Ultrainsulating AVCL membrane will provideboth airtightness and vapour control. Withthe low emissivity foil faced surface facinginto the service void airspace, the wallstructure will benefit from additional thermalperformance.

Replacing a standard Protect TF200breather membrane on the outer sheathingboards with Protect TF200 Thermo

REFLECTIVE TECHNOLOGY MEMBRANES

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Insulation lambda value

140mm stud in timber frame 0.032 0.035

Description Thickness Thermal resistance mm values

Rsi - 0.130 0.130

Plaster skim 3.0 0.017 0.017

Plasterboard 12.5 0.066 0.066

Air and vapour control layer -

Timber frame (insulation between studs) 140.0 4.375 4.000

OSB sheathing 9.0 0.073 0.073

Protect TF200

Unventilated air cavity 50.0 0.180 0.180

Brick outer leaf 102.5 0.133 0.133

Rse - 0.040 0.040

Total 317.0 4.102 3.877

U-value W/m2K (rounded) 0.25 0.26




Rsi - 0.130 0.130

Plaster skim 3.0 0.017 0.017


Low emissivity service cavity 25.0 0.780 0.780

Protect VC Foil Ultra



Protect TF200 Thermo



Rse - 0.040 0.040

Total 342.0 5.590 5.329


U-value performance tables

insulating breather membrane will ensurethat the wall structure will benefit fromadditional thermal performance when thelow emissivity foil faced surface faces intothe drainage cavity. Using Protect TF200Thermo will provide protection to thepanel during the construction process andwill also allow the panel to dry out oncethe external cladding is completed.

The innovative Protect TF InterFoilinsulating breather membrane can beinstalled either on the cold side of thepanel, on the inside face of the sheathingboard, or on the warm side of the panel

Table 2Timber frame construction with Protect TF200 Thermo insulatingbreather membrane and Protect VC Foil Ultra insulating AVCLmembrane

behind the vapour control layer. In allinstances, the insulation is held in positionwithin the studs to facilitate the 20mmairspace by a Protect Cavit-E Tray formineral wool slab insulants (see table 3image). Innovative, rigid EPS insulants suchas Jablite JTWS-TF have integral ribs onboth sides to maintain the 20mm airspaces,removing the need for the Cavit-E Trays(see table 4 image).

The tables below show typical U-valueresults when combining the Protect rangeof Reflective Technology constructionmembranes with differing lambda insulants.

Table 1Timber frame construction with Protect TF200 standardbreather membrane

(Showing mineral wool insulation) (Showing mineral wool insulation)

The U-value results have been determinedas follows:

Bridging:A thermal bridge percentage for the timberstuds of 12.5% has been used inaccordance with BR 443:2006 Conventionsfor U-values (section 4.5.1 (ii)).

Correction level:A correction level of 0 has been used inaccordance with Table F1 of BS EN ISO6946:2017 Building components andbuilding elements - Thermal transmittance -Calculation methods.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . .

4

. . . . .




Rsi - 0.130 0.130

Plaster skim 3.0 0.017 0.017





Unventilated air cavity/Cavity-E Tray 20.0 0.770 0.770

Protect TF InterFoil





Rse - 0.040 0.040

Total 342.0 5.689 5.468





Rsi - 0.130 0.130

Plaster skim 3.0 0.017 0.017













Rse - 0.040 0.040

Total 342.0 5.787 5.079


Table 4Timber frame construction with Protect TF200 Thermo, Protect VC Foil Ultra and two layers of Protect TF InterFoil low emissivity membrane

Table 3Timber frame construction with Protect TF200 Thermo, Protect VC Foil Ultra and a single layer of Protect TF InterFoil low emissivity membrane

(Showing mineral wool insulation and Cavit-E Tray) (Showing Jablite JTWS-TF insulation with integral ribs)

5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .THE REFLECTIVE TECHNOLOGY PRODUCT RANGE

Protect Cavit-E ClipSpecifically designed for use with Protect VC FoilUltra. The clips are fixed over studs or raftersholding the reflective membrane in place tocreate a 25mm airspace.

Available in 2.2m lengths but can be cut on site into smaller lengths.

Protect TF InterFoilAn innovative, highly reflective, lowemissivity insulating breathermembrane which has been designedspecifically for use within a timberframe wall panel on either or bothsides of the insulation to enhancethermal performance.

Available in the following roll sizes:1.2m x 100m and 2.4m x 100m.

Protect TF200 ThermoA high performance, highly reflective,low emissivity insulating breathermembrane which combines high tearstrength with weather resistance andvapour permeability.

Available in the following roll sizes:0.3m x 100m, 0.6m x 100m, 1.5m x 50m, 2.7m x 100m and 3.0m x 100m.

Protect VC Foil UltraA robust and highly reflective, lowemissivity insulating air and vapourcontrol layer which has been developedto enhance the thermal performance ofwalls, ceilings and floors.

Available in the following roll sizes:1.35m x 50m, 1.5m x 50m (both sizes with and without integral lap and sealing tapes), 2.7m x 50m, 2.7m x 100m and 3.0m x 50m.

Protect Cavit-E TrayA purpose designed, translucentinsulation spacer / support tray to createa circa 20mm air cavity within the depthof the wall stud, used in conjunction withProtect TF InterFoil, Protect VC Foil Ultraand mineral wool slab insulants.

Available in boxes of 50 to suit 600mmstud centres but can be cut on site to suit other sizes.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PROTECT LAP AND SEAL TAPE RANGE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

910035 June 2018 4773

The Protect Lap and Seal tape range hasbeen developed to complement theProtect range of constructionmembranes to help reduce uncontrolledair leakage in all forms of buildingconstruction.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PROTECT MEMBRANES 2 Brooklands Road, Sale, Cheshire M33 3SS Tel: 0161 905 5700 Fax: 0161 905 2085Email: [email protected] Web: www.protectmembranes.com

Protect Membranes maintains a policy of continuous development and reserves the right toamend product specifications without notice.

A division of Building Product Design Ltd. Company Registration No: 3944123

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Stockist’s stamp

ISO 9001 OHSAS 18001

Reflective Reinforced Tape Designed for sealing overlaps of timberframe membranes, air barriers and vapourcontrol layers and for sealing aroundservice penetrations. Can be used forinternal or external applications.

Available in the following roll size: 50mm x 50m.

Reveal Tape Single-sided high-tack, extremely durablewoven reinforced reflective tape, ideal fordressing into awkward details withouttearing. Performs the airtightness functionbetween the internal AVCL and the externalcladding or membrane in and around doorsand window reveals.

Available in the following roll sizes: 50mm x 50m, 75mm x 50m, 150mm x 20m,200mm x 50m and 300mm x 50m.

RELATED PRODUCTS

For airtightness applications, Protect offersBarriAir, a high performance and multi-purpose, coated non-wovenmembrane with integrated lap and sealingtapes which forms a highly effective airleakage barrier with vapour controlqualities.

The Protect FCM750 Floor CassetteMembrane is a high performance, airtightyet vapour permeable membrane whichmaintains the integrity of airtightness atintermediate floor junctions without the riskof interstitial condensation.

Protect's Party Wall Air Barrier (PWAB)membrane in conjunction with ProtectTapes and full-fill insulation enablesairtightness and the Notional Dwellingtarget value to be met in accordance withBuilding Regulations.

protect reflective technology...bs en iso 6946), they effectively block infra-red radiation and...

Documents