GRP roof topcoat wet and coming off at the touch

[Krad]

Hi I had a GRP roof done last week and the builder put the topcoat in the evening and the day before we had rain so I think the laminate/resin was wet on the roof (when he applied topcoat).
Today I checked the roof and the topcoat is wet, some area with ridge and coming off when I touch it. When I press with the hand, the print remains on the roof.

The builder said it's not a problem and there is no leak. I found online that if the topcoat is wet then it's better to sand it off and reapply the mat and resin to make sure no damage to laminate and then put the topcoat again.

Do I need to get the GRP done from scratch? Or is there another solution?

Thank you

 

[noseall]

Hi I had a GRP roof done last week and the builder put the topcoat in the evening and the day before we had rain so I think the laminate/resin was wet on the roof (when he applied topcoat).
Today I checked the roof and the topcoat is wet, some area with ridge and coming off when I touch it. When I press with the hand, the print remains on the roof.

The builder said it's not a problem and there is no leak. I found online that if the topcoat is wet then it's better to sand it off and reapply the mat and resin to make sure no damage to laminate and then put the topcoat again.

Do I need to get the GRP done from scratch? Or is there another solution?

Thank you

What's going on with that bonkers gap by the wall? It can't be where the water runs off, surely?

 

[catlad]

Who would do that at this time of year!

 

[Krad]

What's going on with that bonkers gap by the wall? It can't be where the water runs off, surely?

Yes that's where the builder puts the guttering for the water to run off. This is the picture of the guttering. Hope that's okay as I don't want another headache

 

[noseall]

Yes that's where the builder puts the guttering for the water to run off. This is the picture of the guttering. Hope that's okay as I don't want another headache

WTF!