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How to Insulate Your Roof Without Any Kingspan or Celotex

Difficulty: Medium • 7 Steps

This step by step guide shows how to insulate a roof using our Triple Layer System – Exclusive to SuperQuilt Insulation.

The benefit of our system is that this can achieve a 0.18 U Value minimum on a pitched roof, without the need for any Rigid PIR Insulation, such as Kingspan and Celotex.

The main 3 reasons more and more people are opting for this Triple Layer system is because it is proven to save on cost, space, wastage & installation time.

Both SuperQuilt and BreatherQuilt included in this system are fully certified. These certifications include LABC & BDA Kiwa. You are able to retrieve a PDF document displaying the U-value achieved, which can be simply forwarded to building control. To get a copy of this document, please visit our Free to use Online U-value Calculator – Click Here to Use!

SuperQuilt Insulation are the leading UK & European distributor of Multifoil Insulation products. We offer fast next working day delivery to the UK Mainland (Order before 2pm)

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Method Steps

  1. Install your first layer of BreatherQuilt

    Firstly, install BreatherQuilt Insulation on the external of your pitched roof. The reflective foil will need to be facing inwards. Begin at the bottom of your rafters. Staple BreatherQuilt to the first rafter, using 14mm staples (Max 300mm spacing). Roll BreatherQuilt horizontally across each rafter, stapling continuously to ensure the product is secured. BreatherQuilt should sag between the rafters as opposed to being pulled taught. Ensure that once the tile battens are installed, there is a clear 10mm gap between the top layer of BreatherQuilt and the tile battens.

  2. Install next run(s) of BreatherQuilt

    Install the next layers of breatherquilt, ensure that you overlap the product by 100mm. Use the Double Sided Tape that is already on the breatherquilt to secure the two runs and then staple as you did before. Repeat this process as many times as needed, dependent on how many runs are required for the roof. Additional rolls on the verticals should be butt jointed on the rafters. Ensure the butt jointed rolls are stapled as previous and taped using waterproof tape.

  3. Install Tile Battens & Tiles

    At the eaves, BreatherQuilt should extend onto a suitable eaves carrier. This works in the same method as standard breather membranes. Proceed next by installing horizontal tile battens, on the top of the BreatherQuilt. Finally, finish by install tiles or slates.

  4. Install the first layer of SuperQuilt

    The two layers of SuperQuilt should now be installed on the internal. By internal we are referring to the underside of the roof rafters. The first layer of SuperQuilt is to be recessed in-between the rafters (as per image) Recess by 25mm) and fixed with staples on to the battens. The material is then pulled taught and fixed to the opposite rafter. Tape and seal the first layer, over the laps and around the perimeter.

  5. Install the second layer of SuperQuilt

    Once the first has been installed then you can now install the 2nd SuperQuilt layer. Staple or nail the second layer through the first layer into the rafters behind. Ensure this layer is also pulled taught, there will then be a cavity between the two layers of SuperQuilt. As per the first layer, the second layer is also overlapped by 50mm. Ensure again the product is fully taped and sealed using Thermaseal Foil Joining Tape.

  6. Apply a layer of Timber Battens

    Apply a layer of timber battens, leaving at least 400mm between each one. The battens should be 25mm in depth min, to enable the Superquilt to reflect and perform.

  7. Internal Finishing

    Once both layers are installed and taped, you are ready for your batten & plasterboard. Start by installing min 25mm battens on the insulation. We advise to cross-batten, however vertical battens can be used. Finish by installing 12.5mm Plasterboard. There is no requirement for a Foiled-back plasterboard or VCL. SuperQuilt works as a high performance Vapour Control Layer when taped and sealed.

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Disclaimer – This guide is based on 100mm Rafters @ 400mm centres, with access to both the internal and external of a pitched roof.  SuperQuilt and BreatherQuilt should be installed in harmony with the manufacturers certificate, fixing instructions and good building practice. Our Multifoils are to be cut using a craft knife or a sharp pair of scissors – Available in our Multifoil Fitting Kit. No personal protective equipment, clothing or handling is required.

SuperQuilt Insulation cannot be held responsible for any losses financially or physically from advice provided in this How-To-Guide.

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