pressure treated plywood for seat boxes and frames

[lime4x4]

Decided to redo the seating on are 268 searay weekender. I removed the rear bench seat and found the 1/2 plywood rotted and wavy. I also have to redo the seat boxes under both forward seats.My plan was to use 3/4 pressure treated plywood. Does anything have to be done to the plywood? Everything gets coated with vinyl

 

[Lion hunter]

Re: pressure treated plywood for seat boxes and frames

I would paint it for fear that the chemicals will damage the vinyl. The problem with PT is the amount of time it takes to dry before it can be sealed. And the you have to keep it weighted to prevent warpage. I would just get good quality plywood and seal it with paint. How many years were the old frames in there?

 

[lime4x4]

Re: pressure treated plywood for seat boxes and frames

the seats and frame are original 23 years old

 

[Bob_VT]

Re: pressure treated plywood for seat boxes and frames

Are you afraid of bug damage? You can use a quality exterior and just seal it and be ahead of the game.

 

[Lion hunter]

Re: pressure treated plywood for seat boxes and frames

I think that's what I'd do. 23 years and they probably weren't sealed well or at all. If you painted exterior they will probably last twice that long. I don't know if it is possible but I would hate to have PT stain the carpet it sits on or the vinyl around the seat boxes.

 

[lime4x4]

Re: pressure treated plywood for seat boxes and frames

Just thought pressure treated wood should be used.Can i coat regular plywood with a clear polyurethan? I have a gallon of it.

 

[lime4x4]

Re: pressure treated plywood for seat boxes and frames

Also i was just wondering could subflooring 4x8 sheets be used? There 11/32" thick.As long as i sealed all the cut out peices. My buddy has a few sheets left over from a project he did on his house and he said i could have them.

 

[Lion hunter]

Re: pressure treated plywood for seat boxes and frames

The 11/32 under layment will be fine as long as it is thick enough. May have to glue 2 pieces together. Underlayment has exterior glue in it to handle any water getting on the floor of a house. If it was me I'd also use the poly that you have. Any sealant is better than none, and none lasted for 23 years. Worst case scenario is it only lasts 25 years, I wouldn't bother starting to save now for that project. LOL

 

[lime4x4]

Re: pressure treated plywood for seat boxes and frames

I was wrong it is 19/32" thick Just over 3/4 of an inch

 

[Numlaar]

Re: pressure treated plywood for seat boxes and frames

Yeah thats 3/4 standard subfloor... that will work just fine...

Its nice and smooth too, so should be easy to seal it up!

Good luck with it.

 

[allpoints360]

Re: pressure treated plywood for seat boxes and frames

No PT on a boat. (Although I did use a scap piece for an outboard kicker bracket once. Worked fine.) lol

 

[bluewhale]

Re: pressure treated plywood for seat boxes and frames

I was reading another thread about someone using roll-on bedliner to seal/waterproof a new floor in his boat. This sounded like a good and fairly inexpensive idea for seat frames and bases that come in contact with water from wet swimmers/skiers.
Anyone have experience with that?

 

[oops!]

Re: pressure treated plywood for seat boxes and frames

I was reading another thread about someone using roll-on bedliner to seal/waterproof a new floor in his boat. This sounded like a good and fairly inexpensive idea for seat frames and bases that come in contact with water from wet swimmers/skiers.
Anyone have experience with that?

hi blue whale......welcome to i boats....

its allways better to start your own thread or use the search button.....there are many threads about bedliner used as decking.

the only real problem with the product is that it is heavy......gellcoat is a better product imho


cheers
oops