I have a 16' I/O Thundercraft (1986) and the flooring is going soft. I plan on replacing it but wonder if there is a flooring material other than marine grade plywood ?
Use Exterior grade plywood that you can get at Lowes or Home Depot. Works just as good and cost less. I replaced all the decks on My 19' Bluefin with 5/8" Exterior(acx).
yes when replacing the "DECK" exterior ply coated with resin should do the trick... search out deck replacement and you will get an eye fill of reading