Frequently Asked Questions

Roofing

What is a GRP roof?

For a detailed explanation, please view our comprehensive video on the roofing page.

How is a GRP roof laid?

While a GRP roof is relatively easy to install, we advise that you consult one of our GRP roofing guides or discuss your requirements with one of our trained staff.

What coverage can I expect from the materials?

Roofing Resin is applied at a rate of 1.5kg/m2. Topcoat is applied at a rate of 0.5/m2. For a comprehensive guide to planning the materials you will require for specific size of roof please see our Materials Estimator datasheet. For further information download our Materials Usage Guide.

How long does it take to install a GRP roof?

An average domestic garage roof of around 20 square metres can be removed, re-decked, laminated and topcoated within a day by a team of two men.

How long does it take for a GRP roof to cure?

Depending on the temperature, a roof should be cured to the touch within 30 minutes to 1 hour and completely cured within a day or two.

How long will a GRP roof last?

We do not know! A well-laid GRP roof installed with the correctly formulated resins has the potential to last as long as the structure it is protecting. Many of the first GRP roofs laid more than 35 years ago are still in service today.

My roof joins to my neighbours felt roof, how to I join the new GRP roof to this?

This is a common situation; view our guide on Joining Felt and GRP.

What problems could occur whilst laying a GRP roof?

Download our Trouble Shooting Guide and General GRP Roofing Advice sheets.

I want to lay a GRP roof but it is winter, are there any problems doing this?

Download our guide to using Glass Guard in Winter.

I am worried about handling resins and catalysts and don’t know how to store them.

Download our guide to the Handling and Storage of Materials.

I am worried about taking on a large project, is there any training available?

Find out more about our GRP Roofing Training Courses and give us a call to book your place.