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TLX Gold Multifoil Roofing Insulation - Thinsulex (1.2m x 10m Roll)

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£152.00 Incl. VAT
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TLX Gold is a 2 in 1 insulating breather membrane, venting moisture like a breather membrane, whilst insulating like non-breathable PIR board. The key benefit of the product is to improve the thermal performance of a roof without concern of condensation or having to adjust the height of the roof itself,  re-roofing is made easy using TLX Gold.

TLX Gold is Sd intelligent, i.e. it responds to changes in the environment. When humidity increases, the vapour permeability of the product increases and similarly, when humidity goes down, the vapour permeability of TLX Gold goes down, hence condensation risk is eliminated, even with no vapour barrier.

The TLX Gold product is lightweight, quick and easy to fit, comes with European technical approval and is endorsed by LABC. The product has been fitted in over 15,000 roofs and in many cases, removal of existing insulation isn’t necessary.

33mm thick - seven-layer composite structure.


  • Sd intelligent (the more moisture the more TLX Gold breathes).
  • Upgrades existing insulation.
  • Replaces roof underlay.
  • Air barrier.
  • Allows water vapour to pass through.
  • Controls heat loss through management of convection, conduction and radiation.
  • Requires minimal space.
  • Easy and quick to install.
  • Light weight.
  • Clean and easy to use, no protective clothing required.


  • Top layer high performance breather membrane.
  • Core of PET wadding interleaved with reflective films.
  • Bottom layer of reflective film.
  • All layers are breathable, so moisture passes through.
  • Bottom layer reflects infra-red rays back into living space.
  • Weight = 10.8kg.
  • R-Rating: 0.85


Thickness 33mm


Range TLX Gold

Questions & Answers


Is it adequate if that's the only insulation I have when I have a new roof?No other insulation is in the loft area.


You would need to check with your building inspector 


Can I use this product on the outside of a single course brick out building behind wood cladding?


Hi Christian

Officially I would have to say NO. This is because the membrane is not UV resistant over a long period of time - Plus its has only been tested for roofs. you would be better off looking at https://www.roofingsuperstore.co.uk/product/tf200-thermo-insulating-breather-membrane-by-protect-50m-x-15m-roll.html



Do you need to use a roofing felt over the top of this product?


No, this is a 2 in 1 product so does the job of the breathable felt and a multi foil insulation.


Hello what is the U-value of the TLX gold multi-foil insulation thinsulex


This can vary depending on your current roof build up and how it is being installed.


can you batten straight on to it with plain tile battens


Yes, you can batten over the top of it. You can see a little more regarding the installation on the video on the product page.

Have a question about this product?


4.5 / 5 5 reviews
9th June
Pain to fit and waste is costly, specially in valleys.
Jamie Swingler
25th March
Great product.
Alan M Beaty
20th February
Great product
John Middleditch
21st December 2020
First class service
paul pannell
11th April 2020
Quite difficult to use compared to a normal felt. But much better than tlx silver.
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TLX Gold Multifoil Roofing Insulation - Thinsulex (1.2m x 10m Roll)

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