How To Install Siding On A Dormer
Thread: Siding a dormer
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Siding a dormer
On a gable style dormer on a sloped roof, must the vinyl siding on the side of the dormer be an inch or two above the shingles, overlapping the flashing? Thanks guys.
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Re: Siding a dormer
Not so important with vinyl as there is no decay aspect from water wicking upwardly into shingle ends, simply if it is the first layer of covering there will exist no room for another layer making reroofing more than expensive for no practiced reason. 3/iv gap would allow second layer install with no trouble.
If information technology is the second layer information technology is fine every bit the roof will take to be stripped next time anyway.
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Yes that was my thinking, there wouldn't be a wicking problem but good advice about the possibility of adding some other layer of shingles. Thanks Wayne
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Brian,
You lot are close to being correct, you accept the right idea, but the wrong clearance.
The specified clearance between roof shingles and the 'J' channel is 1/two" MINIMUM, and so, yeah, 1" or so would be expert equally well.
Become here ( http://world wide web.vinylsiding.org/publicati...2007Manual.pdf ), go to page 22, Effigy 34.
Jerry Peck
Construction Litigation Consultant - Retired
www.AskCodeMan.com
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Thank you Jerry and thanks for the thread!
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http://www.vinylsiding.org/publicati...2007Manual.pdf
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Check out this generic installation manual or run into your brand of siding specific instructions. There is a diagram on page 27 and the full text which includes the excerpts beneath.
Keep the J-channel a minimum of 1/2" (12.7mm) from the roof line. Chalk a straight line upwardly
the roof fl ashing to guide J-channel installation. Tip: You can use another J-channel laid over
the shingles as a spacer to create the straight line desired.
Note: Vinyl J-channels should non be in
direct contact with roofing shingles, since
the shingles may transfer enough estrus to
the vinyl J-channel to cause its distortion.
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You typed faster Jerry!
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My last business concern would be for a 2nd layer of shingles as I have never recommended more than than ane layer. At that place is no money savings. A second layer loses years off its life so won't last as long. Later on removing two layers is much more expensive to remove and haul abroad. Possibility of leaks is much greater.
Just some thoughts
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Thanks men!! Appreciated.
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The "j" in contact with the roof does plow brown and misconstrue. I take seen it many times. Most builders now agree information technology up you withal find some that don't.
Besides what has been mentioned is nailing the channel through the step flashing then close to the roof. I have in the past repaired many holes from channels causing leakage. Worst identify is at a valley pan against a wall. Y'all spend all this time putting in this nice pan folded up the wall 7" AND THEY Nail At that place CORNER Mail service & CHANNEL RIGHT AT THE BOTTOM. I got almost builders to become in that location subs to hold 4" upward at the pan so taper back downwards to the one" requirement on the siding. The corner postal service would exist notched on the side that can't be seen anyway. Water then can menstruation freely with out building up debris.
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Source: http://www.inspectionnews.net/home_inspection/structural-components-home-inspection-and-commercial-inspection/10699-siding-dormer.html
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