Anderson Skylight Window Leaks

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.

Anderson skylight window leaks.

1 lift up the shingles next to the skylight one at a time and brush out any dirt and debris. 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. Take a moment to seal any cracks you find on the cover with the clear silicon caulk. To fix a leaking skylight.

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. With a scraper slowly remove the weather stripping around the skylight cover and the curb. Original installation squareness. 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 rep said seal was defective. It is pre molded seamless and waterproof polyur. Leaks at skylights left unattended can lead to costly structural damage rotted roof sheathing rotted roof framing and wet moldy insulation as well. Unscrew the fasteners holding the cover of the skylight window on with an appropriately sized driver.

Two years later after a downpour one of the other skylights developed a leak. I think your anderson slider window has more than air leaks. They leaked brand new. Start by checking that the windows are basically square in the frame.