Specifying hold-back of natural wood siding above roofs

[Michael Thomas]

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

Thanks.

[Bob Knauff]

Siding above roof coverings?? Please clarify.

[Michael Thomas]

Siding above roof coverings?? Please clarify.

See attached.

[Michael Thomas]

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 (http://www.inspectionnews.net/home_inspection/www.fpl.fs.fed.us/documnts/usda/hgb203.pdf)

[Brandon Whitmore]

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

[Michael Thomas]

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

[Brandon Whitmore]

That 1/2" recommendation was a surprise.

Yep, I don't like it one bit.

Michael, your link in post #5 is dead.

[H.G. Watson, Sr.]

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

[Jim Luttrall]

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.

[Brandon Whitmore]

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.

[Michael Thomas]

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.