New GRP roof tacky and has bubbles in it

Hello Jayne, This is known in the industry as “post curing” Which means who ever mixed the resin didn’t mix it enough to, equally mix the resin with the harder, in the bucket and or didn’t add enough harder. So every time the weather warms up the roof will go tacky, this normally will cure on its own given time however it has been over 6 months nearly 9 I would had thought by now the roof would be fully cured. The good news is this shouldn’t cause a leak, if by June the roof is still tacky I’d ask the builders to return to sand and re apply the top coat properly. They can use a angle grinder with grinding disk to quickly prepare the surface, then sweep & wide clean with acetone, using an angle grinder will save them time is a recognised method from the Cure It GRP roofing manufacturers, who are the leading GRP roof manufacturer in the U.K. Good luck, Regards Frankie BT Roofing Services Limited

Short answer, no. A GRP roof should have set enough to be sanded down before the top coat is applied. The top coat contains a wax additive which should leave the roof smooth to the touch and prevents the build up of moss, moss should simply wash away. I would be worried that this roof will not last, osmosis can occur which will cause blistering and eventually leading to the failure of the roof. This may take 5 years but it is inevitable and will drastically shorten the life of the roof. If there's bubbling already occuring, then this could be due to osmosis. It may not be down to the tradesmen, it could be a faulty batch of resin or topcoat. If the tradesmen are refusing to put it right you should contact your local Citizens Advice Bureau and they will advise you on your rights, failing that seek legal advice. In the meantime, get a professional GRP roofer to assess the roof, you may need a new roof laying. Ben Platts Severn Fibreglass

I dont advise rubber roofs never will id advise torch felt or fibre glass with garentee dont repair or do rubber as its not a good system

I agree with franki the top coat has not been mixed properly should not be tacky not enough hardener. When mixed not same quantity of each to cure properly. Nige