How to Fit BreatherQuilt over Rafter

This guide will show you step-by-step how to install BreatherQuilt on the external of pitched roofs.

BreatherQuilt is a 2-in-1 insulating and breathable multifoil for use over rafters. This multi-layered insulation material equates to around 55mm of rigid PIR insulation, such as Kingspan and Celotex, while only being 7mm thick when installed.

YBS BreatherQuilt can be used in both new builds and refurbishments. It is also fully LABC and BBA certified for building control.

Ecohome-Insulation are the leading UK & European distributor of Multifoil Insulation products. We offer free next working day delivery to the UK Mainland (on orders placed before 2pm over £100 + VAT).

Installing BreatherQuilt

Starting at the bottom of the roof, roll BreatherQuilt across the rafters and staple in place.

Ensure BreatherQuilt is draped between each rafter rather than pulled taut. A 10mm clear gap must be formed at the centre of all rafters, between the top layer of BreatherQuilt and the installed tile batten.

Fixing and Cutting

Ensure BreatherQuilt is stapled at 300mm intervals, using staples or nails at least 14mm deep. BreatherQuilt can be cut with either multifoil scissors or a cutting knife.

Both cutting tools, along with a staple gun and staples, are available in our Multifoil Fitting Kit.

Overlapping

Once the first run of BreatherQuilt is fully fixed and draping into the rafters, use the built-in double-sided adhesive to seal both layers together. Install the next layer of BreatherQuilt in the same manner as the first.

Overlap the first and second layer by 100mm, ensuring the double-sided tape is secure and sealed.

Vertical Joints

Where two layers of BreatherQuilt meet on vertical sections, we advise these to be butt jointed, not overlapped.

These joints should be taped over with ThermaSeal Weatherproof Tape.

Final Detailing

At the eaves, BreatherQuilt should extend onto a suitable eaves carrier. Proceed with tile/slate battens and tile/slates.

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

Recommended fixing materials and good building practice should also be used.

Please note this guide is based on the draped detail. Please visit the BreatherQuilt Data Sheet for the counter batten detail.