Pooling water can eventually penetrate through the roof s rubber membrane and metal flashing of a skylight resulting in a leak.
Roof leak skylight flashing.
Plug pinholes with roofing cement and patch holes up to about 3 4 inch in diameter with a patch from the same material as the flashing.
Use a putty knife to add a layer of roofing cement in the gap between the edge of the flashing and the roofing.
The best solution in this case is to slope or build the roof up so water will not pool.
Check plumbing vent boots and roof vents if water is entering from that area to cause the leaking roof.
Apply 100 silicone caulking tube to seal leaks around the skylight lens.
First roughen the area around the hole with a wire brush or sandpaper and then clean it.
Vent pipe leaks during heavy rain can occur if you have cracks in your vent pipe boot or flashing.
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.
If your skylight is still leaking replace repair the metal flashing around the frame of the skylight.
How to repair roof flashing small holes or corroded spots in flashing can be easily repaired.
A skylight is like a window in the roof but its frame is designed and flashed to withstand the rigors of rainfall that a roof receives.
Most residential skylights sit on a raised curb made watertight with metal flashing.
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.
These boots vary in quality flexibility and longevity.
Seal flashing around a leaking skylight start by clearing any water or debris that has collected between the roofing and flashing.
Then lift the roof shingles away from the edges of the skylight so you can access the flashing.
How is flashing installed.
If it s carefully removed when the old roof is torn off it should be reusable.
Velux skylight flashing kits are designed to shed water without relying on sealants that can break down over time and cause damage to your roof.
It often happens that water will pool on a flat roof.
When your roof was installed each vent pipe received a flexible boot to seal water around the round surface of the vent pipe.
Use roofing cement can or tube to seal any gaps or holes in the flashing.
Look for cracks in the base of flexible rubber flashing or broken seams in metal varieties of vent pipe flashing.
Don vandervort hometips integral flashing is built onto the perimeter of some skylights.
As shown at right a skylight s flashing works in concert with the roofing material to usher away rain and snow.
