U-VALUE CALCULATOR
SuperFOIL SFBB Breather

TIMBER FRAME – EXTERNAL

A standard insulation material may insulate your external walls well. But SuperFOIL’s watertight and vapour-resistant multifoils will resist moisture penetration, improve thermal performance and offer better space optimisation and functionality.

Application

Insulating the exterior surface of a timber-framed wall is often the optimal choice, considering various factors such as hygrothermal performance, and building conservation. With a built-in vapor resistance of 1200MNs/g and a certified watertight and breathable membrane, you can choose from a range of external multifoil solutions that suit the best for your build-up without compromising performance.

SuperFOIL’s flexibility extends to its application; you can use it on its own, in single/duet configurations, or in combination with traditional insulation types like mineral wool or PIR boards.

All SuperFOIL products need to be stored indoors until used and should be covered within 48 hours after fitting.

Timber Frame Without OSB

When applying SuperFOIL, affix it directly to the studs horizontally with the built-in overlap facing the floor. Begin at the bottom of the wall and work upwards, maintaining tension during stapling at regular intervals of 50mm-100mm. We recommend installing the product horizontally for added protection from the elements, however, it can be installed vertically (with no adverse effects) if needed.

If vertical installation is necessary, start at the highest point, rolling the product down the wall. Ensure a sealed finish by cutting SuperFOIL to the required length and utilising the built-in overlap and tape for each layer.

To complete the installation, trim SuperFOIL at the floor and top, allowing for a slight overlap. Secure the product by fixing battens around the perimeter, creating an airtight finish. Ensure all tears or cuts are sealed fully using SuperFOIL Butyl tape or any other waterproof tape to achieve an airtight finish.

Install vertical counter battens on top of the SuperFOIL to create an air gap, and fix the external finish onto the battens following the manufacturer’s recommendations, ensuring no SuperFOIL is exposed to the elements.

Timber Frame With OSB

For maximum thermal performance, securely attach battens to the OSB, creating an air space on both sides of the SuperFOIL. Apply the SuperFOIL horizontally with the built-in overlap facing the floor, starting at the bottom and working upwards for each layer.

We recommend installing the product horizontally for added protection from the elements, however, it can be installed vertically (with no adverse effects) if needed. If applying the product vertically, start at the highest point and roll the product down the wall.

Staples should be spaced at 50mm-100mm intervals, ensuring the product is taut. Trim the SuperFOIL at the floor and top, allowing a small overlap, and secure it with battens around the perimeter for an airtight finish. Ensure all tears or cuts are sealed fully using SuperFOIL butyl tape or another suitable waterproof tape to achieve an airtight finish.

Alternatively, SuperFOIL can be directly attached to the OSB, though this method will decrease thermal performance. In either installation method, follow manufacturer recommendations for fixing external finishes to counter battens, ensuring no SuperFOIL is exposed to the elements.

Best Products for External Application

Choose your Solution

Use the charts below to find the ideal combination of insulations for your project

Construction Thickness R-Value
External Surface 0.040
Cladding 15mm 0.129
Batten / Cavity 38-63mm 0.455
SuperFOIL 45-100mm See Table
OSB 9mm 0.69
Other Insulation (between joists) See Table
Plasterboard 12.5mm 0.070
Internal Surface 0.184
image

Technical Information

Technical Information

SELECT VARIABLE

THERMAL PERFORMANCE
PRODUCT DIMENSIONS
FIRE PERFORMANCE
ADDITIONAL INFO
PRODUCT COMPOSIITON
SF19BB SF40BB
Core performance 1.454 R Value 2.92 R Value
Roof Performance* 2.22 R Value 3.67 R Value
Wall Performance* 2.53 R Value 3.98 R Value
Emittance 0.19 0.19 / 0.03

*Core value + 2 air spaces / EN 16012

SF19BB SF40BB
Thickness 40mm 75mm
Length 10m 10m
Width 1.2/1.5m 1.5m
Coverage 12/15m2 15m2
Weight 8/10kg 20kg

*Core value + 2 air spaces / EN 16012

SF19BB SF40BB
Reaction To Fire (Euroclass) Class E (Behind Plasterboard) Class E (Behind Plasterboard)

*Core value + 2 air spaces / EN 16012

SF19BB SF40BB
Water Vapour Resistance 0.115MNs/g 0.115MNs/g
Resistance To Water Penetration W1 W1
Tensile Properties (Length) 238 / 227 N/50mm 238 / 227 N/50mm
Tensile Properties (Width) 111 / 100 N/50mm 111 / 100 N/50mm
Resistance to Tearing (Length) 179N 179N
Resistance to Tearing (Width) 179N 179N
Elongation (Length) 61 / 57% 61 / 57%
Elongation (Width) 92 / 87% 92 / 87%
Flexibility at Low Temp. -40°C -40°C

*Core value + 2 air spaces / EN 16012

SF19BB SF40BB
Reflective Coated Breather Membrane 1 1
Perforated Aluminium Coated Reflective Foil PET 3 3
Perforated Reinforced Heavy Outer Reflective Foil 1 1
Loft Quilt 80g/sqm Layers 4 9
Total Layers 9 19

*Core value + 2 air spaces / EN 16012

FREE Insulation Guide

Take advantage of our free insulation guide; an in-depth look into everything you need to know for insulating your project.

Request Free Insulation Guide

Marketing Consent
This field is for validation purposes and should be left unchanged.

Multi-Award Winning Family Business

22960

Before you go, be sure to

Download Your FREE

INSULATION GUIDE

22961
22962
22963