New topcoat over existing GRP flat roof?

[sjroberts1]

Hi, i have a fairly old flat GRP flat roof of about 46m2 that is looking a bit aged with a few tiny hazing cracks and topcoat missing bits (approx 5mm2) not many and on the whole the roof looks in an ok condition.
Unfortunately during the heavy rain we have been having it has decided to leak into the kitchen below, a drip every 20seconds or so, not too bad but bad enough to need to get it sorted.
Ive been up there this morning and covered some of the possible patches with gorilla patch and seal tape as a temporary fix.

The question i have is whether i would be able to give the whole roof a light sanding, acetone then reapply a new top coat or is something more drastic and costly required?

Thanks for your help

Steve

 

[sjroberts1]

Anybody have any ideas?

 

[ChrisJP]

I have good results with coating a felt roof with Bostik Flexacryl. Where there were imperfections in the felt I covered these first with decorators scrim bedded into an initial coat of Flexacryl, and then followed up with another coat over the whole roof.
I recognise that this probably is not good for a 20 year life as would be a complete re-felt, so I expect to inspect and repair if necessary every Summer. However, for me this is better than the upheaval of having the whole roof stripped back to the rafters and remade - which is what all the roofers I've contacted wanted to do.

 

[sjroberts1]

Thanks for the reply but it’s a fibreglass roof not a felt roof. Thanks tho

 

[ChrisJP]

I don't think Bostik Flexacryl is specific to felt roofs. AFAIK it'll work just as well on a fibreglass roof.