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- 10 Nov 2014
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Long time lurker, first time poster, I'm wondering if someone can provide some info into an issue I'm having.
Bit of back story - two years ago I had a flat roof re-done with EPDM membrane by a roofer. Shortly afterwards we discovered there were problems with water ingress into the cavity trays.
There were possibly multiple issues causing the water to come in, but during look at all this I discovered that:
- the rubber membrane was only slightly returned under the existing lead flashing. The returned amount isn't very big (maybe 10cm). The roof also has a door that leads out onto it, which had a stone step. Under that it's returned even less.
- the membrane isn't adhered to anything like the brickwork behind and and is loose. Where it isn't loose already you could easily peel it off. There's a large amount of stones and water collecting under the flashing when it rains.
As is always the first port of call, I got the roofer back last year. He wasn't having any of it and at the time it was easy for him to fob me off as the render seemed to have gone porous and was holding water which he claimed was the issue.
However that issue has been sorted now but with the heavy wind and rain we're having, while the water is coming in less than before, it is still collecting in the tray (noticeably under the door).
Does the above method of fitting sound right? One person has suggested that capillary action could be drawing the water up and over the membrane and into the bricks behind?
Just need to arm myself with a bit more knowledge before I confront him again.
Bit of back story - two years ago I had a flat roof re-done with EPDM membrane by a roofer. Shortly afterwards we discovered there were problems with water ingress into the cavity trays.
There were possibly multiple issues causing the water to come in, but during look at all this I discovered that:
- the rubber membrane was only slightly returned under the existing lead flashing. The returned amount isn't very big (maybe 10cm). The roof also has a door that leads out onto it, which had a stone step. Under that it's returned even less.
- the membrane isn't adhered to anything like the brickwork behind and and is loose. Where it isn't loose already you could easily peel it off. There's a large amount of stones and water collecting under the flashing when it rains.
As is always the first port of call, I got the roofer back last year. He wasn't having any of it and at the time it was easy for him to fob me off as the render seemed to have gone porous and was holding water which he claimed was the issue.
However that issue has been sorted now but with the heavy wind and rain we're having, while the water is coming in less than before, it is still collecting in the tray (noticeably under the door).
Does the above method of fitting sound right? One person has suggested that capillary action could be drawing the water up and over the membrane and into the bricks behind?
Just need to arm myself with a bit more knowledge before I confront him again.