DIY Doctor

fibreglass flat roofing in cold weather

Postby martinjw100 » Mon Jan 23, 2012 2:00 pm

I need to fit a fibreglass flat roof this week and am worried about the temperature and whether the the resin & top coat will set. The forecast says 6 degrees and dry...

Would it help if I built a frame and canopy & side covers above the roof and directed one of those gas space heaters into the gap ?

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Postby RRS Flat Roofing » Sun Apr 22, 2012 12:12 pm


You've probably done this job now, but for anyone who lands on this topic looking for the same info - Fibreglass roofing must be laid in dry weather onto a dry deck at a temperature no lower than 5°C.
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Postby RubberRoofer » Wed Jan 07, 2015 5:18 pm

Also remember that GRP is very prone to cracking - about 1/3rd of our works are replacing failed GRP roofs.

We use a fleece backed EPDM rubber which is a much better, longer lasting product.

I'd recommend it over GRP every time.
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