Flat Roof Leaking At Flashing

Metal flashing copper bend at a 90 degree angle making the transition between the roof and chimney.

Flat roof leaking at flashing.

It is the first place to troubleshoot for leaks on a 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. Install a gutter flashing between the gutter and the roof sheeting. Flashing just like most other materials asphalt flat roofs tend to expand and contract with changing weather and temperatures.

If you can aim for 150mm. Just make sure you leave enough room for gutter maintenance. Flashing on a wall above a flat roof. Metal flashing that runs alongside a wall loosens up or the caulking gives and a major leak starts.

On a flat roof we suggest starting at 100mm of overhang. 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. The best way to. 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 minimum standard is 50mm.