04-16-2012, 06:45 AM
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CC Member
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Join Date: Jan 2005
Location: Hillsboro,
OR
Cobra Make, Engine: Scratch built CSX style frame, Carbon fiber body, 393 Stroker, T-bird IRS, T5
Posts: 1,623
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Not Ranked
As stated above, not all structural grade plywoods are marine grade. Marine grades are made much differently and use different resins in the plys and also more solid plys with basically no voids in the sheets.
Agree with the sentiment to call a marine engineer or boat builder to find out what they use in your neck of the woods. Up here we would use fir or sapele in a marine grade. Don't forget to use proper fasteners and techniques and for areas that need to be sealed, 3M brand 5200 caulk is the best marine sealer/adhesive I've ever seen. Once it is set up you would have to cut the plywood with a power saw to get it apart.
Bob
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