I have recently had a small (3 x 4 metres) extension built. It has a flat roof which is higher at one end than the other to allow for drainage. I noticed yesterday that the drainpipe from the roof of the main house finishes on the flat roof, meaning that the water from the main roof will end up on the flat roof. Is this normal? Should this not be drained to the guttering on the side of the flat roof?
I am not sure what the roof is made of but it has been finished by being painted with a silver paint.
Any advice would be great. Many thanks. (Lots of problems now arising with the build which is why I don't trust the builders!)
I am not sure what the roof is made of but it has been finished by being painted with a silver paint.
Any advice would be great. Many thanks. (Lots of problems now arising with the build which is why I don't trust the builders!)