Anderson Skylight Window Leaks

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.

Anderson skylight window leaks.

Leaks at skylights left unattended can lead to costly structural damage rotted roof sheathing rotted roof framing and wet moldy insulation as well. Anderson rep said seal was defective. Original installation squareness. They leaked brand new.

1 lift up the shingles next to the skylight one at a time and brush out any dirt and debris. Two years later after a downpour one of the other skylights developed a leak. Take a moment to seal any cracks you find on the cover with the clear silicon caulk. Unscrew the fasteners holding the cover of the skylight window on with an appropriately sized driver.

With a scraper slowly remove the weather stripping around the skylight cover and the curb. Then lift it off and keep it to one side. It is pre molded seamless and waterproof polyur. I think your anderson slider window has more than air leaks.

Sloped glazing such as roof skylights probably has historically had more leaks into the roof structure due to improper roof flashing than other window failure causes. I also see water stains on the bottom of the wooden window frame suggesting there has been wind blown rain or snow melt leakage too. At the time of installation 3 years ago our contractors had a anderson rep out to replace seals in 4 or 5 of our brand new skylights. Start by checking that the windows are basically square in the frame.