Re: Is one type of plywood better than another?
Myself, I don't care for any of the plywoods at either HD or Lowes.. as mentioned the quality on them is mediocre at best...
Also, most home stores the plywood is 3 or 4 plys depending on the rating...
For my rebuild project i went a slightly different route...
I worked at a cabinet shop, and there they get shipped in from specialty vendors, stuff called "Verola"... its an 8-10 ply 3/4" cabinet grade plywood...
Because it's soo many plys, this stuff is indestructable, you can't bend it to save your life!
Now, being cabinet grade its "supposed" to use waterproof glue (kitchen/bath applications), so it seems to hold up really well.
As long as you seal whatever wood you choose, I think you will be fine...
I used this in my transom (two pieces laminated together with fiberglass then glassed over), and its way stronger than the original 2 pieces of CDX crap they used when the boat was built.
the other nice thing is, the way its made, there are no voids, and the surfaces are exceptionally smooth (its designed to simply be stained and its good to go, no sanding needed).
Cost on it 2 years ago was about 35 bucks a sheet and is far less expensive than marine grade, and far superior quality IMO.
You can check with a local cabinet shop and see if they will sell you some.
Hope that helps!