Did a 5:12 total re-roof, teardown to bare wood (older, has 5/8" deck) with vaulting underneath & horizontal decorative boxed in beams.
Customer selected two locations for skylights right up @ the ridge line.
These were the Velux QVM Manual Venting Skylight (the crank pushes out a chain that stiffens to push the pane out; no angled bar like on an old school crank window).
This thing has leaked 3x now & I can’t figure out why - all I can think is it’s the skylight. The leak appears interior (obviously…) @ the BOTTOM of the skylight where it connects with the horizontal beam.
I have checked the seal on the glass where it connects withthe metal framing & there was a bad turn on something related to the crank; it was slightly mooshing the rubber seal, but IMO not enough to warrant a water pen.
The skylight on the Western slope does NOT leak; this one is on the E side & in this area of Texas, less than 5% of our rain & higher winds come from.
The customer said that each time, when we have had a torrential rain, there hasn’t been a leak apparent, however when we have had light rain, the roof HAS leaked.
We’ve removed shingles in all areas around the skylight & have yet to see any moisture on the roof deck; this is a self flashing curb mount style & we’ve sealed it up in all areas, even added a bead along the glass to metal connection on the outside of the skylight.
The lack of roof deck moisture tells me it’s either the flashing to roof deck joint or a bad skylight. The water ONLY becomes visible @ the bottom of the skylight (& yes, the customer said he did a leakdown test).
I’m @ a loss here.