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Re: Roof Sheathing at Ridges

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APA also has guideline recommendations for supporting narrow widths of wood structural panel roof sheathing at the ridge. For information, contact help(--nospam--at)apawood.org.
John Rose
APA (retired)
Tacoma, WA

MSSROLLO(--nospam--at)aol.com wrote:

> I have never seen anyone block the ridge on each side where the gap has been left for the ridgevent.  I see about 100 houses a year and have yet to see one with any visible problems from this practice.
>
> The most common problem I do see is when the decking coursing near the ridge leaves you with a width of less than 1' or so.  I have seen the last course of plywood as narrow as 3".  These all tend to crack in half when stepped on and bow down rather than take a nail.  At least when there is a ridge board, the plywood is supported by the ridge board and is less likely to crack.   Of the ones with what we call a "narrow strip of decking at the ridge", they typically are cracked in half and the ridgevent nails are only in the shingles and did not penetrate the decking.
>
> Ron Martin
> Tuscaloosa, AL
>
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