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Roofing

new roof leaking, roofer won't admit fault

Anonymous user 28/02/2024 - 3.45 PM

i had a new tiled roof installed recently, previously a polycarbonate roof, onto my small extension which is now leaking water down the old outside wall. I am waiting to plasterboard out the inside but can't go forward until the mystery leak is solved. The old outside pebbledash wall abuts to the new tiled roof extension which has the flashing sealed against it. The roofer claims he isn't at fault and that there is a problem underneath my window ledge above the extension and it is getting in through the cavity wall.My argument is the old roof didn't leak, it was tatty. The flashing has been sealed against the pebbledash outside wall, is this common practice? it doesn't look like it has been chased through enough or if at all, could this be the problem? any advice would be greatly appreciated before i get back to the roofer who i feel is fobbing me off because I'm a woman.

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6 Answers

AD Roof Specialists

Rating: 5 out of 5
Wigan
Hi. It seems that there are two potential reasons for your leaking roof. As you previously mentioned, the roof was polycarbonate, In a lot of cases, polycarbonate roofs, often have quite a shallow pitch(15 degrees or lower) If the angle of your new roof has not been adjusted to the recommended angle to accommodate your new tiles, then any extreme weather will almost defiantly result in a leak. secondly, it sounds like the roofer has used a product called flashband for your flashing, which should never be used under any circumstances as a flashing. The pebble dash should be carefully removed so the correct brick joint is located, then grinded out, ready for code 4 lead to be installed in no bigger pieces than 1.5m. then the brick joint and the lead fully sealed with lead seal to allow for expansion. I hope you found this helpful. Best of luck, Adrian. AD ROOF SPECIALISTS
Answered6 October 2019
2

Anonymous user

The wall should have been chased out a min off 2 inches deep and the lead flashing slotted into this ten sealed up with a lead sealant if it is just stuck up against the wall it will allow water to run down the back and into the property
Answered4 October 2019
1

S & S Builders

Rating: 5 out of 5
Herne Hill, London
Sorry but it looks like the roofer is at fault you can’t put flashing on to pebbledash the pebbledash has to be cut out and removed for the flashing to go on to the brick wall and sealed hope that will help Thanks Stephen
Answered4 October 2019
1

Anonymous user

It sounds like the roofer has used flash band on render
Answered4 October 2019
0

Anonymous user

Hi unless I looked at it personally it’s just a guessing game if it hasn’t been chased out that could be the answer thanks DFLroofing
Answered4 October 2019
0

Anonymous user

It could be a number of things: Is is a shallow causing water to blow up under tiles? Is it proper lead flashing chased into wall? Has adhesive flashband been used? This will not be water tight against a pebble dashed wall
Answered4 October 2019
0