Thread: Specifying hold-back of natural wood siding above roofs

Does anyone have a source specifying the required hold back of natural wood siding above roof coverings?

Thanks.

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Siding above roof coverings?? Please clarify.

Originally Posted by Bob Knauff

Siding above roof coverings?? Please clarify.

See attached.

Originally Posted by A.D. Miller

3. ROOF AND GROUND CLEARANCE

Trim that extends down to a roof (dormers, second floors, etc.) and decks requires a minimum of a 2 inch gap to

avoid wicking. Trim, such as water table or skirt boards must be a minimum of 6 inches above the grade.

From: http://www.wrcla.org/pdf/WRCLA_Installing_Siding.pdf

Thanks. I also found this, with a diagram, see pp14:

www.fpl.fs.fed.us/documnts/usda/hgb203.pdf

1/2" here (cedar shakes/ shingles): http://www.cedarbureau.org/installat...wallmanual.pdf

Thank you both. That 1/2" recommendation was a surprise.

That 1/2" recommendation was a surprise.

Yep, I don't like it one bit.

Michael, your link in post #5 is dead.

Originally Posted by Brandon Whitmore

Yep, I don't like it one bit.

Michael, your link in post #5 is dead.

BW, Try fixing the cut & paste error/addy (removing the erroneous "inspectionnews.net/home_inspection/www/" ) like this:

http://www.fpl.fs.fed.us/documnts/usda/hgb203.pdf

Originally Posted by Michael Thomas

Thank you both. That 1/2" recommendation was a surprise.

I think it bears noting that the cedar shakes / shingles are not really just wood siding but roofing materials adapted for use in siding and are naturally decay resistant. The 1/2" clearance would ONLY apply to that specific product, not traditional wood siding.

Thanks HG- got it.

Jim-- I agree that the 1/2" clearance is only for shakes and shingles. The only other type of siding I'm aware of that allows the 1/2" clearance is vinyl. I don't like the minimal clearance allowance for at least a couple of reasons:
1)Water may wick up into the wall, especially if debris bridges the small gap
2)Roofers will have more trouble replacing flashing down the road, so they will be more prone to taking shortcuts.
3)The 1/2" clearance disappears when multiple layers of roofing are installed.

Originally Posted by H.G. Watson, Sr.

BW, Try fixing the cut & paste error/addy (removing the erroneous "inspectionnews.net/home_inspection/www/" ) like this:

http://www.fpl.fs.fed.us/documnts/usda/hgb203.pdf

Hum.. the link works fine for me in FF 3.3.6 ... but not in IE 8.0.7.