Flat Roof Leaking At Flashing

The minimum standard is 50mm.

Flat roof leaking at flashing.

Metal flashing copper bend at a 90 degree angle making the transition between the roof and chimney. Flashing on a wall above a flat roof. On a shingle roof the flashing will get clogged with debris and in turn the water will get diverted under the shingles where it could start leaking. Metal flashing that runs alongside a wall loosens up or the caulking gives and a major leak starts.

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. On a flat roof we suggest starting at 100mm of overhang. If you can aim for 150mm.

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. The best way to. 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.

Just make sure you leave enough room for gutter maintenance.