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Scott Patterson · #6 (**permalink**) 12-06-2007, 07:15 AM

Quote:

Originally Posted by Jerry Peck

I've been trying to wrap mu mind around that ... where does it state a skylight wider than 30" needs a cricket?

A skylight is different than a chimney or wall in that the wider a chimney or wall gets, the more water which will build-up and collect on the high side of it, however, with a skylight, before the water builds up to a point where it could overflow its flashing (the reason for the cricket) the water would overflow the skylight itself because the skylight is not that high.

Unless I am missing something.

Well, I think that I should have said that anything that forms a penetration in a roof that is >30" should have a cricket. Chimney, skylight, ect. This is to keep the water from overflowing the flashing, just as Jerry pointed out. Most of the skylights that I have seen that are big enough to have a cricket are on commercial projects and the cricket is built into the flashing on the high side of the unit.