hi
Had an extension built last year, however discovered that due to ponding, the roof is getting green much and growth where the water is.
I believe the reason is the builders put in furring that are too short, 100mm to 0mm across 4 meters in a 5.5m roof. It was assumed the water would run down the slope and into the gutter, but of course some of that water isn’t getting into the gutter as there is a very slight incline at the edge.
The ponding is about 5-10mm. I tried to put more layers of GRP to raise it slightly, but the matting is so thin, I would probably need about 5 layers to fill this.
is there such thing as a roofing levelling compound in the UK that I can put down then GRP over that?
Had an extension built last year, however discovered that due to ponding, the roof is getting green much and growth where the water is.
I believe the reason is the builders put in furring that are too short, 100mm to 0mm across 4 meters in a 5.5m roof. It was assumed the water would run down the slope and into the gutter, but of course some of that water isn’t getting into the gutter as there is a very slight incline at the edge.
The ponding is about 5-10mm. I tried to put more layers of GRP to raise it slightly, but the matting is so thin, I would probably need about 5 layers to fill this.
is there such thing as a roofing levelling compound in the UK that I can put down then GRP over that?
