Bending plywood for roof
I'm installing new 7/16 plywood on the roof of a trailer. The framework in the roof is flat and then angles down a few degrees near the edge (as opposed to having a gradual curve all the way across). ...
Forum Discussion
Gdetrailer wrote:
You do realize "EXTERIOR GRADE" plywood simply means it is another name for BC grade plywood? BC grade is very rough texture on both sides with one side being lightly sanded.
Exterior grade plywood glue is not moisture resistant, get it wet or damp and it WILL eventually come apart, to get moisture resistant glue you have to MARINE GRADE and that is not sold in big box stores.
Everything I've read has said that exterior grade plywood means it uses waterproof glues, while interior plywood uses merely moisture-resistant glues. That's the main differentiator. Exterior plywood can come in many different face grades (as can interior plywood), though BCX is the most readily available one. Plain BC plywood (as opposed to BCX) is not exterior grade; that's what the X indicates.
Marine plywood is a higher grade for sure, and costs correspondingly more.
