Wayne Whitney wrote:

On 2008-04-06, DerbyDad03 wrote:



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.

Cheers, Wayne


What on earth would have to happen to the house in order for the roof
deck to separate?