30x30 = 900 sq. ft. 1 sheet of plywood is 32 sq. ft. 900/32 is 28.125 sheets. Figure 30 sheets.
There should be a layer of tar paper and then plywood.
There is 32 sq ft in a 4 by 8 sheet of plywood. You would need at least 21 sheets to cover the roof.
Most will have a layer of plastic-like fabric underneath but older shingles may just have plywood underneath.
25 will cover it. I'd get 28.
If there is only one set of shingles on the roof, cover over it. If two, remove the old and then apply the new.
It depends on the size of plywood so there cant be a exact answer. About 120 piece's.
The added weight issue. This is why you see people supporting the new roof with columns.
54.
A call to your insurance company describing why the shingles were lost will answer your question.
you can use it in building the house obviously. ya know with deciding how much shingles its going to take to cover the roof
Approx. 113 sheets
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