How To Seal Roof Around Skylight

This skylight shows the correct flashing technique to make it waterproof.

How to seal roof around skylight.

Replace or repair the metal flashing around the frame of the skylight. 1 lift up the shingles next to the skylight one at a time and brush out any dirt and debris. Unscrew the fasteners holding the cover of the skylight window on with an appropriately sized driver. Then apply roofing cement to the bottom side of the shingles that belong around the skylight window and secure the shingles again.

With a scraper slowly remove the weather stripping around the skylight cover and the curb. Without removing the metal frame and replacing the seal we can make a transition that will never crack again. If the metal flashing around the skylight isn t properly installed the rain runs down the slope of the roof onto the. Identify the areas where the flashing meets the roof and spread roofing cement around the entire window at these sections.

It is pre molded seamless and waterproof polyur. Use roofing cement can or tube to seal any gaps or holes in the flashing. To fix a leaking skylight. Apply 100 silicone caulking tube to seal leaks around the skylight lens.

2 using a caulking gun loaded with a tube of roofing cement force the mastic up under the shingle where the metal flashing meets the roofing felt the thick black paper under the roofing material. Seal skylight cracks with a layer of clear silicone along the entire length. In order to install a skylight however a hole must be cut into the roof. You should spread the cement at a thickness of about 1 4 inch.

Then press down on the roofing shingles to seal them tight. Inspect the roofing and flashing around a leaking skylight. Number 5 shows how the final step counterflashing is integral to the skylight and covers the upper edges of the roof flashing. Once you re sure the water is penetrating from the roof outside look carefully to see if the shingles and flashing around the skylight are properly installed and functional.

Repairing a skylight with metal frame. Step 3 secure the shingles. Watch this video on how to seal between the glass and metal frame of an old style skylight. How to roof around a curb mount skylight.

The seal between the glass and metal frame is what deteriorates and then cause the skylight to leak.