|
Re: OSB on top of cedar shake roof
I can see nothing but problems with (a).
Starting with: How many layers of roofing do you have?
First, the reason for limiting the number of layers of roofing is weight - two layers will add more weight to the trusses/rafters than one layer, history has shown that two layers are okay.
So, let's go back to (a) where you have one layer of roofing (the wood shakes, and another layer of roofing (the 5/8" plywood), and you are talking about adding a third layer of roofing (the asphalt shingles) on top of that?
As I said: "I can see nothing but problems with (a)."
|