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Repair botched roofing

3 years ago

A polyurea coating was applied to a GRP flat roof on the advice of a roofing company. The coating needs to be removed because it was unevenly applied and the roof waterproofed. How do you go about this? How do you find a reputable contractor who won’t cut corners? The firm that applied the coating says that it is expertly applied and level.

What do you recommend as a roof covering? The roof is 25m2.

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Comments (4)

PRO
Kingfisher Designs
3 years ago
TBH I'm always worried about flat roofs, they always find a way to fail. you might be able to have a very shallow pitched room built onto it like the leaded roofs used on large stately homes? though there would be a lot of gullies.
User
Original Author
3 years ago
Thanks for your comment. The GRP was not applied properly the first time round so the roof leaked under the parapet. I think it is not the style of roof that is the problem but the workmanship of the roofer. No insurance policy covers poor work.
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Rowland
3 years ago
hi,

looking at the photos I think you may need to raise the level of the perimeter brickwork. you should have a 150mm upstand around the permitted to an abutment. to allow for water bouncing up from the roof. this could be why you had problems at the edge with water getting under the coping stones . if water is under the current membrane might be best to strip back and check everything . change the detail of the edge to ensure it is correct. check falls and address as necessary and renew the covering correctly.

you don't need to have an expensive covering, but just one that is laid correctly. a flat system would be fine , if laid by a professional that knows what he is doing and wants to do a good job. that may be difficult buy it is possible to get a contractor via a trade association or material manufacturer who gives an assurance on quality of work.
I wish you well but remember tradesmen sometimes talk a better job than they can deliver. if in doubt use a surveyor to monitor and check work. it often pays for itself in the long term.

Best

Rowland
User
Original Author
3 years ago
Many thanks Rowland. Very smart advice.

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