Order Helpline 01752 692 206

SuperFOIL SFTV Thermal Vapour Barrier 1.5m x 25m Roll - 37.5m2

Product Code:
Est. Delivery: 7-10 Working Days
Shipping costs displayed in basket.
We can let you know when this product is back in stock.

This product is proving to be very popular and has unfortunately sold out.

Enter your email below and we'll notify you as soon as this product is back in stock:

Subject to stock availability, if products on a 24 hours service are ordered alongside products NOT on a 24 hours service, this may delay your whole order.

View Transport Policy

All delivery charges are included in the final shopping basket and are dependent on the products Scottish Highlands & the Islands where additional shipping charges will apply.

Please note that not all products will incur an additional delivery charge to the Scottish Highlands & the Islands – this is based on the costs from the manufacturer, distributor or courier providing shipping on our behalf. If your delivery address is in the Scottish Highlands and Islands, a member of our helpline team will contact you prior to processing your order should an additional delivery charge apply.

While we make every effort to ensure orders are delivered by the date required, we cannot guarantee availability from the manufacturer or the manufacturer's delivery schedules.

Any variation to web delivery date given will be advised to you by email or telephone. If we are unable to make delivery because access is not possible, we reserve the right to make a failed delivery charge.

£64.80 Incl. VAT
Oops! Please select from the options
Request U-Value Calculation


SuperFOIL SFTV is the ultimate all-round building membrane for roofs, walls and floors. Water & vapour proof SFTV is also a foil radiant barrier that will reduce solar gain in summer and improve insulation in winter. SFTV's reflective properties add to the overall uValue of the building fabric. To achieve the maximum energy performance in new build and retrofit projects, SFTV makes an ideal 'airtight' layer suitable for the entire building envelope.

Layers : 3 - polypropylene reinforced heavy laminated foil.
Width : 1.5m.
Length : 25m.
Coverage : 37.5m2.
Colour : Silver.
Weight per roll : 4.8kg.

Thermal insulation values including 2x air gaps
Roof : 0.95 R.
Wall : 1.42 R.
Floor : 2.8 R.


  • Waterproof.
  • Vapour proof.
  • Air tight.
  • Radiant barrier.
  • Helps to prevent mold & damp.
  • Enchances thermal resistance.


Length 25m Thickness 1.1mm Width 1500mm


Permeability Air Tight Roll Size 37.5m2 Range SuperFoil

Questions & Answers


Could this product be used for under carpet insulation,


It can be used under carpets but is a vapour barrier so will not provide much in the form of thermal benefit, I would reccomend the following as a better alternative - https://www.insulationsuperstore.co.uk/product/superfoil-sfuf-underfloor-foil-insulation-15m-x-8m-roll-12m2.html


Can you lay underfloor heating mat on top of this product and then tile on top it’s going on to a chipboard floor.


It is not reccomended to do this, instead SUPERFOIL manufacture a product specifically designed for underfloor heating - https://www.insulationsuperstore.co.uk/product/superfoil-sfuf-underfloor-foil-insulation-15m-x-8m-roll-12m2.html


What size lap is required and presumably the join is covered with silver tape? What edge treatment is required?


It is reccomended that you follow a 150mm lap and cover any joins with SUPERFOIL Superior Tape - https://www.insulationsuperstore.co.uk/product/superfoil-superior-20m-x-100mm-foil-tape.html - There is also a guide on installation which you may find useful - https://www.superfoil.co.uk/wp-content/uploads/Downloads/SFTV/SFTV-install-guide.pdf



Would this be suitable as a vapour barrier when building a sauna room?


The reflective foil material will help as will allow the room to retain more heat whilst reflecting when considerably warm, provided it is installed correctly it is perfectly fine to use in a sauna room should you wish instal a vapour barrier. 


How thick is this product?


This product is 1mm in thickness. 


How thick is this product?


Thickness: 1mm 


Hi folks, I need to purchase a vcl for a warm flat roof on my new self build extension. Which one would be your recommendation? Cheers David


Hey Dave, SuperFOIL SFTV Thermal Vapour Barrier 1.5m x 25m Roll - 37.5m2 would work great or any of our Noiva, tyvek products :)

Have a question about this product?


5 / 5 6 reviews
Simon Walker
30th July 2021
Perfect product exactly what I was after 10/10
Stephen Watts
14th March 2021
Good product just the job
9th February 2021
Product is great, not very well packaged.
ceri hicks
30th November 2020
Good product
Brian Matthews (TAMIYA)
10th November 2020
Very pleased with this product, very strong material and have found it ideal to use over PIR insulation in conjunction with SuperFOIL Superior tape in my new timber shed which is being converted into a craft room, the room already feels cosy, excellent product.
Mr Roger Walton
20th September 2020
Easy to work with and strong.
Sorry, there was a problem loading the reviews. Please try again.

Products We Recommend


Product Enquiry Form

SuperFOIL SFTV Thermal Vapour Barrier 1.5m x 25m Roll - 37.5m2

*Required Field

SuperFOIL U-Value Calculation Request Form

Your Details

Project Details

Enter a value between 5 and 10000
*Required Field

Would you like to empty your basket?

Yes No


It seems you are running an older version of Internet Explorer. Our site does not support these old browsers as they do not house the technology that allows our site to be safe and secure.

If you wish to access our site please either upgrade your browser or download an alternative.