"SteveB" wrote in message
...
I live in a dry area. I want to replace some wood on my boat. Is marine
plywood an absolute necessity, or would a good grade of sanded one side
suffice? About the only time it would get wet would be when it is outside
and it rains, and we get less than two inches annually.

Steve


You need the marine when you are doing structural mostly. Supposed to be
there are no voids inside to trap water. My floor lasted 17 years and was
Pressure treated ply with Nautilex vinyl covering.