Where to find Marine grade plywood for boat floor

[kanigie]

Have a 16' Sylvan v hull that needs the floor replaced. Painted plywood only lasted 2 years. Where can I get marine grade flooring? Internet search hasn't yielded any affordable results. Boat is 30 years old so I don't want to invest to much into it.

Any other materials ideas or tips would be appreciated.

[Ringtail]

Look into HDPE sheeting. I used it on my 15’ key west to repair the consol. If you get a thick enough piece it would probably make a nice floor. 

[MGHunter66]

Lumber yards will carry it, you putting carpet on top or vinyl?

[Nadornati]

Regular AC will work fine. Coat wood in epoxy - no need to overspend on marine grade for something like this. Without a proper sealing , marine grade will rot just like regular ply. 

[FishNHard]

I just pulled the floor on my 16 duranautic , lowes in Howell has it for $50 a sheet but even tho its marine plywood you should still seal it , as ringtail said you can also you HDPE but again still need to be sealed . 

[Nadornati]

May want to add a light sheathing layer of glass (10oz) to prevent checking when your deck flexes as well. 

[Nadornati]

The only difference between your fir marine grade vs AC is your number of plys and voidless. 

[kanigie]

All great great tips. 

Epoxy is the sealing material you recommend?

[kanigie]

40 minutes ago, MGHunter66 said:

Lumber yards will carry it, you putting carpet on top or vinyl?

Carpet. 

Unless there is a better option someone can recommend. 

[Bonefreak]

I used pressure treated plywood on a few decks on jon boats over the years and it lasted long. 

[kanigie]

Just found PVC board at lowes. $76 for a 4'x8' sheet.

https://www.lowes.com/pd/Royal-Building-Products-Actual-0-375-in-x-48-in-x-8-ft-Common-PVC-Board/50393486

This should work perfectly, no?

[Nadornati]

12 minutes ago, kanigie said:

All great great tips. 

Epoxy is the sealing material you recommend?

Yes, more coats the better.  Edges and undersides as well. 

[MGHunter66]

17 minutes ago, kanigie said:

Carpet. 

Unless there is a better option someone can recommend. 

All depends what you want, vinyl doesn’t get soaked like carpet but carpet feels better underfoot. It’s an extra step but priming the bare wood before either helps quite a bit, also use a good glut like Franklin and use a notched trowel to thoroughly cover the ply when you glue down the vinyl/carpet

[Ringtail]

20 minutes ago, kanigie said:

Just found PVC board at lowes. $76 for a 4'x8' sheet.

https://www.lowes.com/pd/Royal-Building-Products-Actual-0-375-in-x-48-in-x-8-ft-Common-PVC-Board/50393486

This should work perfectly, no?

Yes this is pretty much what I was referring to. 

[MGHunter66]

28 minutes ago, kanigie said:

Just found PVC board at lowes. $76 for a 4'x8' sheet.

https://www.lowes.com/pd/Royal-Building-Products-Actual-0-375-in-x-48-in-x-8-ft-Common-PVC-Board/50393486

This should work perfectly, no?

very heavy and carpet glue will not stick to it very well. Also if you are screwing pedestal seats in it the gripping strength is poor.