What plywood for stringers & floor?

[ontopcop]

I promise i searched the threads, i thought i knew the answer, had printed it years ago, but lost the paper.
Anyway... I'm not looking for fancy composite, just what is the best ply to buy at Home Depot or Lowes to use for making the stringers and floor?

 

[Rob B]

I promise i searched the threads, i thought i knew the answer, had printed it years ago, but lost the paper.
Anyway... I'm not looking for fancy composite, just what is the best ply to buy at Home Depot or Lowes to use for making the stringers and floor?

Exterior grade 3/4" plywood for the stringers/knees and 1/2" for the floor.

 

[ontopcop]

Thanks. I thought i had read some time ago to use "Baltic Birch" plywood, the guy at lowes looked at me like i was crazy when i asked for birch plywood, and Home Depot said they had Birch.

 

[Madtown]

I used marine grad plywood for my resto from Menards. Had to be special ordered but was on sale. My stringers are made out of 3/4 & doubled up on each side. Bonded them together with thickened epoxy. Floor was made out of half with layer fiberglass on each side.

Eric

 

[paulsboats]

AC fir works nice .just seal it up with resin.especialy the edges!the AC is better than some of the marine plywood ive seen.

 

[Skip 7750]

Plywood

AC (1side good) or even CDX (no good sides) have exactly the same glue as Marine ply. The only difference is that marine usually has a couple of more ply's and the core voids are filled.

Almost all hardwood plywood has interior glue. Stay away from it!

You can get an aircraft grade Baltic Birch that has an exterior glue. It is very expensive.

I just got some for a friend with a Cracker Box in 4x10 3/8" Thick.
He re skined the bottom because the Okoume ply on the bottom delaminated. It must of worked, because he got 2nd place at the nationals just 3 days after putting a new bottom on his all wood boat.

For what you are doing AC should be just fine.

 

[paulsboats]

The 3/4 ac fir i get here is 7ply and almost never any voids in it..and you would never guess that it comes from South America.Then go over to the marine plywood stack and it looks like total junk. Made in USA. Whats up with that?

 

[clarencio]

stringers

This is an old thread so I may not get any comment but I used 3/4 x 6
PVC board to replace my stringer------no more rotted wood. Has anyone else done that???
clarencio

 

[Kdebolt]

Did the predictor with all marine ply 1/2 inch for the floor doubled up 1/2 for the stringer doubled 3/4 for the transom