Treated plywood ok?

you'll have an issue glassing the treated stuff unless you let it dry out for quit awhile, just use regular ply wood and cover all sides with resin before you install then use more resin and glass to tie it in.

Hi Wood

I have done this project several times,for myself and others.Accordding to what I have learned,Ext. plywood has the same glue as marine the difference is the quality of veneers and voids.I believe you can used ext plywood cut to shape and seal the edges real well and the faces to of course.I think the best seal is SMITH'SCLEAR PENETRATING EPOXY SEALER,this is not a glue 2 part brushes on like water then paint.But that can be over kill as replaceing the floor isn't that tough a job and I've seen 15 yr service out of a good enamel paint job.

as alway

Good luck Munday

Interior plywood - the plys are glued together with glue that isn't waterproof.

Exterior - the plys are glued together with waterproof glue but the inner plys may have small voids or gaps.

Marine - waterproof glue and all the voids or knots or gaps have been filled with the footballs like you see on the outer ply of "appearance grade" plywood. This makes the intergrity of the plywood more consistient and structurely sound. Used where structual support is needed.

Treated plywood - waterproof glue. May have interior voids. Treated to slow rot and decay.

I would buy exterior plywood and encapsulate it with epoxy (all surfaces--top, bottom, sides). You won't have to worry about rot or the glue not holding. I'd just use epoxy without fiberglass. The glass would provide more strength and give you abrassion resistince but I don't think it's needed.

IMO, marine grade is over-kill and you won't gain anything by using treated. You would still need to encapsulate it. The chemicals used to treat the wood will leach out over time if you don't. Plus you would need to leave it out in the sun for a couple of days to let it dry before you encapsulate it.

Wood: What do you mean "I got carried away"? Are you crazy? You already got one big project going, the Higgins, and probably at least one car or truck to paint and now you rip out your floor on the '62. Pam must wanna kill ya!

Did you get my phone message a couple days ago or are ya to busy now!?

john

I should have know an old woodie would know about CPES.Thats the ticket for sealing wood fiber and making a stable surface to paint.If you don't have anything in paint shop I can bring 64 C10 its almost ready for paint just the bed to block now.It kinda got put back had to bore and valve the Wheel Horse,threw a rod in the manx buggy(little to much fun on the beach when lake was low)and then the rebuilt carb on 92SN didn't fix a flat cam hmmmm.So last weekend she got new Comp Cam.

Were the floors glassed into sides Wood?On my buddy Wally's 66 Mustang they weren't but we did glass them back with a couple pieces of glass tape.

OSB won't hold up in the long run or maybe even the short term depending on how it's used and the amount of water that gets on it.