When properly laid, GRP roofing or glass fibre roofing as it is more commonly known will last for a minimum of 30 years with very little deterioration. There are however a few key tips you must remember in order to get the most out of a GRP roof. Firstly the roof should be laid on a dry deck and preferably in dry conditions with a temperature not below 5°C.
Secondly you must ensure that the resins and top coats should be suitably for use in roofing. When applying the GRP laminate and top coat, the deck should be of 18 mm exterior plywood or Sterling Board and be well fixed onto the underlying joists. Usually it takes two men about a day to strip, re-deck, laminate and top coat a roof of about 20 square metres.
Always try to plan starting the roof when a settled period of weather is forecast and ensure the new deck is laid to adequate falls to allow for good drainage. There should not be any standing water on the roof after completion.
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