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Posted by RicodJour on April 6, 2008, 2:57 pm
>
> > I have 3/4" tongue & groove under the shingles, not plywood. He didn't
> > look in the attic.
>
> If you are in a high wind or seismic area, you may wish to consider
> going over all the T&G 1x with 1/2" plywood to improve the shear
> resistance of the roof. Of course, the wall sheathing would be more
> important to strengthen, but it is presumably not accessible.
At $45/sheet? You're pretty free with the guy's money. The house has
been standing for 50 years, so there's little benefit to be gained
from an extra layer of sheathing. I also don't like adding weight to
a roof unnecessarily.
R
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