How to Fit SuperQuilt Under Rafter

This how-to guide will show how to install YBS SuperQuilt Insulation under rafters.

YBS SuperQuilt is fully certified by LABC, BDA, and BBA for use in roofs, walls, and floors. The multifoil insulation is very popular in refurbishments, loft conversions, and new-build projects, to achieve U-values in less space, cost, wastage, and installation time compared to rigid insulation such as Kingspan or Celotex.

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 — orders over £100 + VAT).

Installing SuperQuilt

SuperQuilt can be installed either vertically or horizontally, depending on rafter height. Staple SuperQuilt to the rafters at 300mm intervals.

Ensure SuperQuilt is pulled taut while rolling and stapling.

Overlapping and Taping

Ensure SuperQuilt joints are overlapped by a minimum of 50mm, and that overlaps are fully taped and sealed using ThermaSeal Foil Joining Tape (75mm x 50m).

SuperQuilt can be easily cut using multifoil scissors or a cutting knife, both available in our Multifoil Fitting Kit.

Eaves Detailing

At the eaves, SuperQuilt is cut around the rafters and sealed to the cavity wall insulation or wall plate. It is vital to ensure it is fully taped and sealed, so SuperQuilt acts as a high-performing vapour control layer.

Installing Counter Battens

Fix 25mm x 38mm battens underneath SuperQuilt — this is commonly installed horizontally. Deeper battens can be used if preferred, or if your U-value calculation recommends it.

Battens must also be fixed around the perimeter of windows and doors.

Internal Finish

The plasterboard is then screwed into the battens in the usual manner. When SuperQuilt is installed as the most internal insulation layer, there is no requirement for foil-backed plasterboard, as SuperQuilt works as a high-performing vapour control layer when taped and sealed using ThermaSeal Foil Tape.

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

Installation of SuperQuilt Insulation for under rafter should be in harmony with the official certificate. Recommended fixing materials and good building practice should also be used.