Marine Grade plywood or regular ???

[RobertElmore]

Well I cut out the entire helm area on my 23 Sceptre it was all kind weal as well I do not likethe strait up and down wheel. So I am going to rebuild it at an angle. My guestion is do I really need to use marine grade plywood seeing how I am doing to glass both sides and the ends.

[cdavisdb]

Exterior grade, if you seal the wood well, will do for delamination purposes. If you need maximum strength to weight, marine ply is a better choice. Also exterior grade has much more tendency to warp. I had to buy 2 sheets of exterior for my last project, because much of the first warped before I could use it.

[RobertElmore]

I was thinking about that pro grade cabnet 3/4 inch stuff they sell at Home depot. They claim it will not warp. I guess I should step up and get the marine grade !!!

[2182]

any closed cell plywood will not warp. cabinet grade should be closed cell. that said, i would definitely pay the extra $30 for marine grade.

[BigLew]

The plywood is probably the least of the project cost. The most expensive is your time. Everything else falls in between.

That said, "Pay me now or pay me a lot more later." Your choice.

Just my 2 cents. Take it for what it is worth.

[RobertElmore]

Point well taken !!! I will step up and buy the Marine grade after all I only need 3 sheets. the rime while all ways at a premium is not really a worry to me. After all we have a closed season on Grouper. The Ajs are $600 dollars worth of gas off shore.