GRP roof leaking and holds water

Notch7 · 10 Jul 2019

oldbutnotdead said:
If the resin has cracked it indicates that your 'roofer' hasn't created a solid deck. GRP is strong but brittle- if the deck sheets are floating about then you'll get more cracks. What did he use for the deck?- 18mm t & g OSB is favourite.
The ponding is a combination of lack of fall and raised edge trims- no good to you now but you do get a neater job if you rout the trims into the deck.

Yes we always route out a strip say 60mm wide x 3mm deep which allows the GRP edge drip to sit down.

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GRP roof leaking and holds water

Notch7

DIYnot Local

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