Manufacturers and suppliers to the home improvement industry

Speak to our team of experts 01254 871 800

Instant Bi-Fold Quote

Trade customers can now get instant online pricing for our Opal bi-fold door collection. Click "Get a Quote" to login or register for an account. Instant access to our incredible range.

10th June 2022

Prefix WARMroof® - Part L Compliant

Our Prefix WARMroof® is Part L Building Regulations compliant!

From June 2022, there are important changes being made to the thermal requirements for home extensions and replacement tiled roofs. Whilst some conservatory or porches remain exempt installers need to be ready for the changes in legislation.

The Prefix WARMroof® conforms to the new Approved Document Part L volume 1 – Building Control changes which come into effect from June 2022. Our WARMroof® can achieve U values as low as 0.13. Whilst our standard roof specification can achieve 0.15 U value without the need for insulated plasterboard therefore conforms to the new building regulation changes for both refurbishment and new build installations.

Our system has U-values independently verified by BRE testing laboratories. The system has also been modelled using the latest condensation risk analysis software by BRE.

The Prefix WARMroof® is also the ONLY 'warm roof' system that is able to accommodate an upgrade to triple glazing in our WARMroof Hybrid, providing superior thermal values over any other WARMroof system available.   If you need to know more or want more information on building control changes, Prefix is here to help. Email us or call us 01254 871800

Speak to our team

Contact us today to enquire about products, get marketing materials for your customers or to receive after-sales care from our dedicated team.

We take your privacy seriously and only use your data to respond to your request. View our Privacy Policy to learn more.