Combine the performance of our watertight breathable membrane with the highly reflective radiant barriers, and you have our highly versatile SuperFOIL SFBB.

Breathable Radiant Membranes For Use In Roofs, Walls & Floors…

SFBB, a highly advanced reflective breather membrane featuring radiant barrier properties, serves as a cost-effective and intelligent choice to safeguard your property from external weather conditions, moisture penetration, and potential water damages. Specifically designed with a certified ‘W1’ watertight membrane, SFBB offers superior protection for your property and adheres to the energy efficiency standards of the UK.



A certified 2-in-1 product, providing a breather membrane and a high-performing radiant barrier —all within a single product.


Meet or exceed project requirements, whether used on its own or in hybrid solutions. Rigorous testing ensures compliance with the latest building regulations.


‘W1’ for watertightness.


Multifunctional,  lightweight and easy to install design that requires no specialist tools.


New build, retrofit, timber-frame and DIY projects to achieve maximum performance, while maintaining a slim profile.


How SuperFOIL SFBB Benefits You

Designed as a breathable reflective membrane, SuperFOIL SFBB is a highly versatile solution from our 2-in-1 design range. This product not only enhances energy efficiency by controlling air leakage but also outperforms traditional insulation types due to its efficient design.

Designed to have a certified ‘W1’ watertight membrane, SFBB ensures exceptional water resistance properties. Its perforated layers contribute to the breathable properties, enabling moisture that entered the fabric of your home to escape without causing structural damage. SFBB’s built-in reflective layer acts as a radiant barrier, providing a thermal advantage over standard breather membranes and eliminates the need for additional installation measures. By minimising condensation and addressing temperature differences, SFBB offers superior protection, efficiently tackles energy loss, enhances comfort  and saves on energy bills.


Compared to many traditional insulation types, SuperFOIL SFBB’s ease of installation, flexibility and multifunctional design minimise product wastage, and installation time. Offering excellent value for money, our breathable radiant barrier is perfect for new builds, renovations, and extensions. It is versatile enough to be used in both domestic and commercial projects, regardless of the project’s size and scale. This means you don’t need to purchase additional breathable products to protect your roof and walls while insulating!

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Technical Information

Technical Information


Specification Value
Product SFBB
Core Performance N/A
Roof Performance* 0.29 R Value
Wall Performance* 0.36 R Value
Floor Performance* N/A
Emittance 0.19

*Core value + 2 air spaces / EN 16012

Specification Value
Thickness <1mm
Length 25m
Width 1.5m
Coverage 37.5m²
Weight 5.4kg

*Core value + 2 air spaces / EN 16012

Specification Value
Reaction To Fire (Euroclass) Class F

*Core value + 2 air spaces / EN 16012

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

*Core value + 2 air spaces / EN 16012

Specification Value
Reflective Coated Breather Membrane 1
Perforated Aluminium Coated Reflective Foil PET
Perforated Reinforced Heavy Outer Reflective Foil
Loft Quilt 80g/sqm Layers
Total Layers 1

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Discover The SuperFOIL Difference

Read what our happy customers are saying about SuperFOIL
products and services.

Amazon review for SuperFOIL products

Easy to use, cut to size without any waste once measured carefully. Something I've thought of doing for many years but, never got round to it. Intend to sit back and hope it preformed as promised, I'm sure it will since the product is hailed by the experts on energy performance and importantly enough for seven radiators. Definitely recommend. Thank you..


Product: Radpack

Google review for SuperFOIL Insulation

Superfoil products radically simplified achieving the required insulation ratings for our renovation / extension project. I was very keen to maximise internal space in both the dormer spaces and a very large flat roof avoiding tall external build up. The technical team provided detailed options and then were more than happy to iterate these to refine the final solution. I ended up using a hybrid solution of SF40BB and SF40 along with Vapour barrier and mineral wool. I would recommend speaking to the tech team – they certainly allowed me to get the outcome I wanted.

Jake Markham

Product: SF40BB, SF40

Google review for SuperFOIL Insulation

Can’t recommend these guys enough. Spot on customer service always happy to help to get you the right product and information. And the products are brilliant. Thank you for all your help.

Neil Murphy

Customer Service Review

Google review for SuperFOIL Insulation

This company is very thorough in it's efforts to be of assistance. Always ready with ( Good ) technical advice with respect to questions about each insulation product but also importantly will assist on the users application of the product, and any queries regarding suitability and installation. With SuperFoil guidance your project should end up being a success.

Nova Scot

Customer Service Review

Amazon review for SuperFOIL products

Very pleased with this kit and within about 2hrs it was installed. The insulation most closely resembles bubble wrap however was much thinner and behaved more like cardboard. Very easy to cut with a pair of scissors and the supplied double sided tape is good quality. The 100mm wide tape is a bit fiddly as it is wider than scissors and tears easily however with a bit of patience it worked well. Installation – The insulation comes in 600mm wide rolls which is a bit smaller than I needed to do a full horizontal section, I decided to cut twelve small individual panels, plus two full width strips to finish with. I stuck the double sided tape all around the outside edge on each of my three horizontal areas, I also sprayed contact adhesive onto the metal door inside the tape frame. I then used four of the small panels on each area with around 10cm overlap. I finished by running double sided tape along the horizontal bars that were remaining and covering with the long strips of insulation. Finally, I taped between all of the sections to create one large airtight piece. The contact adhesive probably isn’t needed however at £6 for a spray can on Amazon I thought I may as well secure it properly. Final results are a noticeable reduction in outside noise and a lot more light in the garage for working on my bikes, hopefully it makes the garage easier to heat in winter and not allow the temperature to get too high in summer. We’ll see! Garage door opens and stays open with no obvious strain on the mechanism from the additional weight. Overall very pleased with the kit and a bargain imo.

Andy Man

Product: Garage Door Insulation

FREE Sample Pack

FREE Sample Pack

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