Roof pitch changes at last tile on garage

mick111112 · 15-02-2021 01:20PM #1

Had a small leak in a sitting room which was converted from a garage. I removed some roof tiles where the leak was happening and discovered water pooling in the felt above the leak. The roof is a pitched roof at the side of the house built around 1989. The rafters run down from the gable end at the same angle but stop short of the last roof tile which almost levels out. Finding it very hard to get the felt to have a good slope for the water to drain off into the gutter. Just wondering is this construction of the roof rafters correct or the best way to put right. The roof tiles have that wave shape and when the wind and rain comes a certain direction it blows water under the tile which then pools. Any advice would be great Thanks.

Calahonda52 · 15-02-2021 01:29PM

IIUYC correctly the piece that is missing under the felt is an eave fillet or a tilting fillet

https://www.google.com/search?q=eaves+details&client=safari&rls=en&sxsrf=ALeKk008TiQzIWSImXliNGHssbeRwqJFdg:1613392012652&tbm=isch&source=iu&ictx=1&fir=XhP1d0LOFLD8GM%252CIS_X7tlcILkOJM%252C_&vet=1&usg=AI4_-kRbn_sCDDxCn60Dm8-chIh8etRY7A&sa=X&ved=2ahUKEwjckbDO8evuAhUSuHEKHRemBIgQ9QF6BAgYEAE&biw=1359&bih=705

sydthebeat · 15-02-2021 01:38PM

mick111112 wrote: »

Had a small leak in a sitting room which was converted from a garage. I removed some roof tiles where the leak was happening and discovered water pooling in the felt above the leak. The roof is a pitched roof at the side of the house built around 1989. The rafters run down from the gable end at the same angle but stop short of the last roof tile which almost levels out. Finding it very hard to get the felt to have a good slope for the water to drain off into the gutter. Just wondering is this construction of the roof rafters correct or the best way to put right. The roof tiles have that wave shape and when the wind and rain comes a certain direction it blows water under the tile which then pools. Any advice would be great Thanks.

youre supposed to have a higher quality felt at eaves level.

type 5U or better

https://nordroofs.ie/product/5u-eave-support-felt

mick111112 · 15-02-2021 07:16PM

Thanks for the replys I will look it the stronger felt when the weather improves.

the_pen_turner · 15-02-2021 07:50PM

post up a pic.
is there an overhange of the soffit and fascia.
generally water pooling due to the bellcast would leak outside .
there should be no water on the felt so you must have a leak higher up

Bonzo Delaney · 15-02-2021 08:33PM

The problem could also be the angle of the bellcast .
If the first tile at the gutter is near level with the wind that blew yesterday it'd blow rain back in to the roof causing it to pool on the felt

mick111112 · 16-02-2021 09:57AM

I will get a picture of the roof after work, its paint bubbling on a small section of wall inside where the water seeped in. You can see a wet patch on the wall outside where the water is running down behind the fascia and soffit. I would have thought that the roof would have worked better if the angle of the joists was kept at the same pitch all the way to the gutter. Thanks for the reply.

mick111112 · 16-02-2021 10:01AM

Very true, the problem is where there is least protection from the wind from the neighbours house. Is there any reason why they change the pitch for the last tile. Thanks.

the_pen_turner · 16-02-2021 03:53PM

What angle is the roof.
The Belfast is usually either to slow down the water or for the look

chooseusername · 17-02-2021 10:16AM

Sounds like OP has interlocking roof tiles, so bellcast or sprocket at eaves
not appropiate.

Roof pitch changes at last tile on garage

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