shingling around vents


Old 11-19-01, 02:44 AM
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Question shingling around vents

Is there more than one common and acceptable practice when it comes to shingling around the vents on a roof (attic, furnace, plumbing)???

I have always thought that you were supposed to shingle up to the opening, place the flashing or rubber boot so that the bottom flange lays over top of the shingles (using whatever appropriate asphalt cement), and then continue shingling over top of the flashing or boot and on up the roof.

I just had a house built and complained to the builder about this. The roofer put the attic vents in place how I would think is correct but installed the flashing and rubber boot under all the shingles for both the furnace and plumbing vents. Their reply, after sending the site superintendant and a rep from the roofer, was that everything is correct.

I would like to press the issue with them to fix this under warranty and am hoping to get all the facts first. Is there a website I can check out for official code on this?
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Old 11-19-01, 02:56 AM
Mike Swearingen's Avatar
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Check with your local Building Inspection Department for local codes.
Good Luck!
Old 11-19-01, 08:29 PM
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i would almost bet that they did go under the bottom of your flange boot whatever instead of leaving it exposed just went over the bottom with a shingle same thing as what you are saying just looks differant
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