Failed Seal on Skylight - Slightly

This is more of an FYI and something I have never quite come across…While walking the roof, I saw this skylight. There was roughly 18" worth of water in the seal of the 2 panes. No leaks on the interior, however there was so much moisture inside of the panes. The seller thought it had moisture present, but assumed it was only on the exterior and never went on the roof to confirm. The plexi top portion was cracked on all of the edges. This was comical at best…Just a wow as this house from 1907 will sell for 1.4 million based on location.

Pic attached.

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Acrylic domed skylight. A: Lost seal. B: Condensate trapped between the inner and outer done. Likely someone caulked/sealed where there should not have.

Needs replacement. Nicely flashed curb.

Explain to your client, within the domed skylight aluminum inner frame, much like a window frame, there is an angled channel to disperse condensate, then the seal, atop an outer extruded aluminum frame. Incase of seal ware/failure, as in your case, condensate is dispersed to the roof.

Acrylic domed skylight are inexpensive compared to manufactured galvanized sheet steel and glass HIP or Gable Skylights.
Acrylic domed skylight life expectancy, 5 to 10 years. Average Cost, no installation, $1,000.00
Galvanized sheet steel and glass HIP or Gable Skylights, 50 years. Average Cost, no installation, $2,750.00.

I use to fabricate sheet metal skylights, as well as flashing, coping, goosenecks, drain flanges, crickets, during the winter when I was BUR roofing when I was in my early 20’s when work was slow in preparation for the coming year. If my memory serves me well, 12 and 13 bends to fabricate the rib and top rail. All manufactured from 8’ x 4’ foot minimum 26 gauge, at time 24, galvanized sheet metal passed through roller cutters and bent on hand breaks. All joints soldered.
sheet metal hand break illustration