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We just moved into a new place with a flat roofed double garage.
Roughly 5.8 x 5m with a fiberglass(?) roof.
We've spotted a few issues with it:
1. Water pools on the roof
From my calculations it has a fall of 1:128 and on the lower edge there is a bit of a lip that holds the water back. It's probably only 2-3 years old and the top layer of fibreglass is starting to flake off, but no signs of leaks yet.
I assume we will encounter issues in the future, what are the options to remedy this?
My first thought was to just raise the front of the roof to bring it up to 1:80 fall but looking at how it was constructed I think the entire roof would have to come off as everything is screwed in from the top/under the fibreglass.
There are 2 joists spanning the length of the garage meeting in the middle supported by the girder. Secured together with screws.
The joists at the front sit on top of these horizontal parts sat on the blocks.
Joists are secured from the side into the horizontal parts below them.
Similar at the back (lower part) of the garage but only 1 horizontal board. I think this is where the fall comes from.
Any ideas if I could remedy this from inside?
Would there be a solution from outside/above? Redo the fibreglass with more of a fall?
2. Water gets behind the guttering
This was caused by me sweeping the water off the roof.
The fibreglass roof doesn't overhang enough so some of the water misses the guttering. This causes some big damp patches and white/salt marks inside.
Looking up there, it seems someone has stuck some lead up between the fascia and the lip of the roof so all water is directed into the guttering.
I need to do the same along the full length and am wondering if some flashing tape would do the job. i.e this. Or is there a more suitable product?
3. Water sits on the base and seeps inside.
Any rain that hits the walls still runs down and sits on this ledge between the cream and grey blocks. The cream blocks are sat on DPC, but even so we are getting some damp patches along the base of the wall inside.
I assume I need to put something on this ledge so water runs off and doesn't sit there. Would a simple mortar edge angled at 45 degrees do the job? Is there something more attractive I could do/use?
Cheers
Roughly 5.8 x 5m with a fiberglass(?) roof.
We've spotted a few issues with it:
1. Water pools on the roof
From my calculations it has a fall of 1:128 and on the lower edge there is a bit of a lip that holds the water back. It's probably only 2-3 years old and the top layer of fibreglass is starting to flake off, but no signs of leaks yet.
I assume we will encounter issues in the future, what are the options to remedy this?
My first thought was to just raise the front of the roof to bring it up to 1:80 fall but looking at how it was constructed I think the entire roof would have to come off as everything is screwed in from the top/under the fibreglass.
There are 2 joists spanning the length of the garage meeting in the middle supported by the girder. Secured together with screws.
The joists at the front sit on top of these horizontal parts sat on the blocks.
Joists are secured from the side into the horizontal parts below them.
Similar at the back (lower part) of the garage but only 1 horizontal board. I think this is where the fall comes from.
Any ideas if I could remedy this from inside?
Would there be a solution from outside/above? Redo the fibreglass with more of a fall?
2. Water gets behind the guttering
This was caused by me sweeping the water off the roof.
The fibreglass roof doesn't overhang enough so some of the water misses the guttering. This causes some big damp patches and white/salt marks inside.
Looking up there, it seems someone has stuck some lead up between the fascia and the lip of the roof so all water is directed into the guttering.
I need to do the same along the full length and am wondering if some flashing tape would do the job. i.e this. Or is there a more suitable product?
3. Water sits on the base and seeps inside.
Any rain that hits the walls still runs down and sits on this ledge between the cream and grey blocks. The cream blocks are sat on DPC, but even so we are getting some damp patches along the base of the wall inside.
I assume I need to put something on this ledge so water runs off and doesn't sit there. Would a simple mortar edge angled at 45 degrees do the job? Is there something more attractive I could do/use?
Cheers
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