In the process of having a new flat roof laid. The first cement screed/base (using fine sand) was down and then 4 coats of the waterproofing product applied all over it. Then some small ventilation holes drilled to the outside walls to put small pipes (about the size of 5p coin) in for air-circulation about 10 around two sides of the roof. All completely dry and no leaks. Good so far.
However, 5 Hours after having the second cement screed/base on top (this time using coarser sand). It started to rain.
Will this cause a problem. Will all the new cement have to come up because there is nowhere for the water to go except into it. Will it penetrate through the roofmate & just sit there and never dry out. Which will cause a problem later on when the tiles are laid as they will start to lift after time.
PS The roof of the house is in Spain, so it maybe slightly different than normal. Any advice please
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Rain whilst Flat Roof being laid - Problem?
in Roofing
Posted
In the process of having a new flat roof laid. The first cement screed/base (using fine sand) was down and then 4 coats of the waterproofing product applied all over it. Then some small ventilation holes drilled to the outside walls to put small pipes (about the size of 5p coin) in for air-circulation about 10 around two sides of the roof. All completely dry and no leaks. Good so far.
However, 5 Hours after having the second cement screed/base on top (this time using coarser sand). It started to rain.
Will this cause a problem. Will all the new cement have to come up because there is nowhere for the water to go except into it. Will it penetrate through the roofmate & just sit there and never dry out. Which will cause a problem later on when the tiles are laid as they will start to lift after time.
PS The roof of the house is in Spain, so it maybe slightly different than normal. Any advice please