Repairing a skylight leak that has a metal frame
Watch this video on how to seal between the glass and metal frame of an old-style skylight. The seal between the glass and metal frame is what deteriorates and then cause the skylight to leak. Without removing the metal frame and replacing the seal we can make a transition that will never crack again.
How to repair a Metal Roof Leak on Skylight Flashing
Total Time: 20 minutes
Rubber membrane
Another method to repair skylight flashing on metal roofs is to use the Modified Bitumen Rubber membrane to make the transition.
Preparation
We clear all the old tar and caulking from the flashing.
Torch Down Rubber
we cut a modified Bitumen membrane that will fit in between the risers of the panel and overlap the flashing
Using Karnak 81 Trowel
Adhere the membrane to the metal surface. We use Karnak 81 or Karnak 66 trowel grade. We smear the Karnak the entire surface of where the rubber membrane will cover and then place the membrane in place. We then roll out all the air trapped to make sure the rubber membrane is fully attached to the metal.
This method is very effective. The rubber membrane can move and stretch with metal panels as it expands and contracts.
What causes a skylight to leak?
Most skylights have a metal frame that holds the glass in place. Between the metal frame and the glass is a rubber gasket. This rubber gasket shrinks and dries out. The metal frame is also not too tight and space opens up between the frame and the rubber gasket which causes water to leak through.
Can skylights be repaired effectively?
Yes, but not with caulking. Most repairs we have seen were done with caulking and that never works. We use a product called Super Silicone Seal to seal the transition between the frame and the glass.
where you do buy the super silicone seal
what is the manufacturer of the product
They only sell online