I am a home owner with a technical roofing question.
I 'm located in Wisconsin,.
My ranch home is 27 years old, and has its original roof.
The original windows and patio doors were double pane wood/aluminum construction.
They were always poor windows, collecting frost and water during the winter months.
They were in very poor shape, and I recently replaced them with triple pane vinyl.
These new windows and doors are much better, and we are pleased with them.
The roof will be replaced this spring, with the cedar shingles being removed down to the osb deck.
This also involves the replacement of two fixed skylights.
The present Velux double pane wood/aluminum skylights are in bad shape.
They never did a good job, and always wept.
The condensation and run off has increased as the skylights lost their air seal.
I want to replace them with triple pane vinyl.
Triple pane vinyl skylights are vary hard to find.
I have contacted three local roofing contractors to get estimates for the roof replacement.
One of the contractors found a manufacturer of vinyl skylights.
After much research and discussion with one of the contractors, I decided to order the two skylights I would need.
The skylights are here, and ready for use when the roof is replaced this spring.
They are triple pane with aluminum outside and vinyl inside.
They look great, and have very good insulation values.
After discussion with a second contractor, a concern came up.
The skylights have a “self-flashing” vinyl flange.
It’s “vinyl, not neoprene or rubber” per manufacturer info.
The contractor would be using GAF Ice & Water Weatherwatch.
He would be using it around the skylights, and it would come in contact with the vinyl skylight flange.
He has a concern about a degrading reaction between the Weatherwatch adhesive and the flange vinyl.
I would appreciate any educated opinions from this forum.
I can provide links to the skylights if needed.
Thanks for any info.