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TOPIC: Leaking

Leaking Skylight

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Put on a metal roof and cannot find a caulking material that will seal the skylight. The skylight is on a steep pitch on the roof. It has no "cricket" or other device to direct the flow of water away from it. Should I try to get someone to put on a cricket or can you suggest a sealant that will hold. Metal skylight against metal roof! However, the skylight is old. Should I just take it out and cover with metal?
Guest User

5/3/2004
A cricket would be unusual behind a skylight unless the skylight is very wide. I would suggest having the skylight on a raised curb with the ability to flash up the curve and udner the skylight. For sealant, I suggest a butyl rubber.
Guest User

5/3/2004
I am having a metal roof put on a low slope roof. One of the existing skylights has leaked, and ice dams have caused damage on the existing shingle roof. In order for water not to pool and leak at the higher end of the slope in front of the skylight, what kind of flashing would you suggest? Would a rubber butyl liner be effective underneath the flashing? Thanks!
Guest User

5/12/2004
First of all, you mention low slope ... is the metal roof you're installing appropriate for your roof pitch? Next, the roofing manufacturer had better have installation instructions which detail how to flash a skylight. If not, please find another roofing manufacturer. Finally, the skylight needs to be on a raised curb so that the roof flashing can extend up its sides. The trickiest area will be the "high" side where water will run into the curb of the skylight. The flashing in this area needs to extend well up under the roof panels and under the underlayment at some point. The flashing also needs to be designed to direct water down the sides of the skylight. I hope this helps. Todd Miller
Todd Miller
Isaiah Industries, Inc.

5/12/2004