Metal flashing that runs alongside a wall loosens up or the caulking gives and a major leak starts.
Flat roof leaking at flashing.
Over time this continued expansion and contraction can cause the flashing to pull away from the edges and corners of your roof leading to leaks and moisture that can get trapped inside your roof.
Just make sure you leave enough room for gutter maintenance.
The other issue is if the installer nailed the shingles through the flashing then those nails could start rusting and cause a skylight to leak.
Flashing is the number one cause of leaks on flat roofs.
The best way to.
The minimum standard is 50mm.
This video demonstrates where flashing could be leaking from on a brick wall.
It is the first place to troubleshoot for leaks on a roof.
Install a gutter flashing between the gutter and the roof sheeting.
This flashing rests on the front edge of the lowest batten with a squash fold to direct any possible.
Flashing on a wall above a flat roof.
If you can aim for 150mm.
On a flat roof we suggest starting at 100mm of overhang.