When it comes to saving space and insulating effectively, SuperFOIL SFUF is the premium choice you are looking for.

Reflective Multifoil Insulation For Use In Solid & Suspended Floors…

Our underfloor insulation is created using the most modern technology and exceptionally high standards to help you insulate your property most efficiently. Designed after considering all types of underfloor heating, SuperFOIL SFUF is an incredibly versatile solution. It can be used under screeded or laminated floors, over and under suspended concrete or timber floors, or even for your underfloor radiant heating pipes—without ever having to compromise your space.



A certified 3-in-1 product, providing high-performing insulation, vapour control layer (VCL), and a 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.


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 SFUF Benefits You

Originally designed for solid floor applications, SFUF’s high-performance insulation isn’t limited to floors; it’s a versatile solution for roofs, walls, and floors. Thanks to its highly efficient 3-in-1 design, SuperFOIL SFUF provides high-performing insulation, a vapour control layer, and a radiant barrier. This significantly helps improve the U-value, comfort, and energy efficiency of your property without increasing your floor depths.

When installed properly, the highly reflective SFUF offers multiple benefits for your home, including optimal thermal performance, energy conservation, minimising thermal bridging, and even impressive sound insulation (reducing noise by up to 22dB). SFUF’s exceptional high standard includes a specialist polythene top layer, allowing direct application under screeding. The built-in protective layer means the top can be screeded without worrying about damage to the insulation. The grid markings on the foil make installation effortless and time-saving.


Due to its lightweight, flexible, and versatile design, SFUF is perfect for all underfloor insulation applications across domestic or commercial projects, regardless of the size and scale. When installed with minimal compression and without air gaps, SFUF creates an airtight project and provides a thermal break, even in areas difficult to insulate using traditional insulation materials. A cost-effective and slim alternative to bulky and heavy insulation types, SFUF is quick and easy to install and can meet all your project requirements for new builds, extensions, or retrofit projects.

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Technical Information

Technical Information


Specification Value
Product SFUF
Core Performance 0.8 R Value
Roof Performance 0.8 R Value
Wall Performance 0.8 R Value
Floor Performance 0.8 R Value



Specification Value
Thickness 6mm
Length 8m
Width 1.5m
Coverage 12m²
Weight 6kg



Specification Value
Reaction To Fire (Euroclass) NPD



Specification Value
Water Vapour Resistance 1200MNs/g
Resistance To Water Penetration W1
Tensile Properties (Length) 606/580N/50mm
Tensile Properties (Width) 514/526N/50mm
Resistance to Tearing (Length) 275N
Resistance to Tearing (Width) 305N
Elongation (Length) 24%
Elongation (Width) 23%
Flexibility at Low Temp. -40°C



Specification Value
Reinforced Heavy Duty Double Laminated Foil 2
Aluminium Coated Reflective Foil PET Layers 4
Thermo Foam Separation Layers 6
Polyethylene protective layer 1
Total Layers 13



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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

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