Odd plywood size solutions

[3175375]

I need to replace a slide out floor in Bruno, my 2010 Holiday Rambler Endeavor RV. The floor has delaminated.

The floor is about 2-1/2 wide by 12’10” long, 1” thick.

I want to use marine grade plywood, finished on both sides.
2 ways I have learned are:

1) to put together 2 pieces by ‘scarphing’ them

2) bond layers of 1/4” plywood and staggering the butt joints, like bricks, or siding.

I have looked online for larger single board solutions, but no joy.

Any wood workers / craftsman with recommendations and / or solutions?

 

[BigblueC]

For simplicity I would simply cut a scarph joint and glue it. When done right the joint area will be as strong or stronger than the other sections of the board. This will effectively create a single board and can likely be done/assembled where you need it to be so you won't have to wrestle a 13' long board.

Using 1/4" to create your own 1" plywood will get messy and expensive material wise, so I'd avoid that if possible.

 

[bnz84]

Look online for some free sheds or anything outdoor and ply-woody. You may have to get more than one as most are messy at the bottom. Similar but not really what you want is dining room tables. Nobody wants them. They are cheap and I glue the leaves together and brace it and cut into desk tops. Perhaps a table sandwiched between cheaper 1/4 inch. And if its water resistance you want you might consider regular plywood with you own waterproofer. In the past that wasn't very economical but I'm guessing now the chemicals are cheaper than the wood.

 

[bnz84]

Also cost wise you are now getting to composite decking (can get it locking and in 12 foot lengths) and PVC panel territory. On friday I saw 3/4 4x8 white in home depot. Heavy as heck. Ive never seen that before.

Also there is Marine "Starboard" decking to. Its plastic cutting board mtrl. I used a piece to replace glass I broke in a patio table. Last for years. But this stuff will not glue at all really.

 

[3175375]

For simplicity I would simply cut a scarph joint and glue it. When done right the joint area will be as strong or stronger than the other sections of the board. This will effectively create a single board and can likely be done/assembled where you need it to be so you won't have to wrestle a 13' long board.

Using 1/4" to create your own 1" plywood will get messy and expensive material wise, so I'd avoid that if possible.

I thought the same regarding the 1/4” stacked option. Thank you!