replace floor with 5/8 or 3/4
 

I was going to replace my boat floor with 3/4 marine ply but am concidering using 5/8 marine ply to help keep the weight down. The price difference is not the issue less than $100 differance it looks like 5/8 wood core was origonally used.Has anyone on here replaced their deck with 5/8 I dont want to regret later.
Looking for opinions????
Ray

I don't think resin will stick to pressure treated ply, use regular.

it will only if you let it dry out for months in a garage or house,

The O/P spec'd Marine Ply, not PT?

the regular PT you get anywheres. im not sure if they make a PT FIR though.

Use regular bc or ac..its getting glassed anyways.

thats what i always use.

LOWES ocasionally has some AB grade 1/2" and 3/4" for reasoneable prices as well. I used AB 3/4" on my fuel hatch I recored and it is ridicuously stout after 3 layers of mat over it. Many older boats used 1/2" in the deck so 5/8" should be fine. If it is a large unsupported span then use 3/4" to avoid warping.

the V's had 1/2 the best i've found is furnture grade hardwood plywood in 1/2 it has 11 ply in 3/4 it has 15 ply.

My V has all those 8 or so inch squares of wood they used. I have never figured out why they used those little squares instead of one full sheet of wood.

that was scrap wood they all used that yrs back to save money they thought. they would take ant wood left from molds, transoms, stringers, and other boat builders to save money they cut to blocks and used in all apps like that. Very common