Information to help you plan for the UK weather

Planning ahead

The weather and temperature play a large role in the life of a fibreglass roofer, so you always need to have one eye on the sky before getting started.

Both the OSB boards and the GRP roofing materials don't cope well with water of any kind falling on them from the sky. Before you start doing anything get the weather from either a local radio station, online or just by going outside and looking up.

Heavy rain on a partially cured roof will inhibit the cure and turn the resin white which means stripping back and starting again, so always have a polythene cover on site and quickly accessible so you can throw over the entire roof. The polythene cover will protect the resin without sticking and will just peel off when the resin has cured.

Never leave the boards bare, always try and get the base layer down and cured in good time. The new deck will soak moisture in like a sponge making laminating impossible. If you have to leave the boards bare then securely cover overnight adding timbers between the deck and cover to allow air movement.


You can optimise the GRP roofing materials to work better in different temperatures by adjusting resin system and catalyst. The Fibrelast base resin and finishing topcoat system can be ordered in a ColdCure version which will allow you to work in temperatures down to 0°c.