I've noticed a lot of guys with high end builds using southern yellow pine (SYP at the local fixit spots) to frame seats and such on some high end builds, as opposed to tight grain no knot wood sold as "marine grade"... i understand that the adhesives used between the two grades are different, but in an application where the wood is being sealed, im wondering what adverse effects using essentially subfloor grade wood (which is leaps and bounds cheaper) would be? On my budweiser budget nova build, I've started using subfloor ply in some of the structural framing because of the cost difference, and also because I feel like a well chosen piece of cheap plywood seems to have a more forgiving fabrication and finish than some of the more expensive materials that I've used. Just wondering if anyone had any input from experience, or horror stories, as inevitably exist... i just feel like the construction quality between what I've pulled out of boats, and what budget hacks ive put in is leaps and bounds apart. Any input is greatly appreciated!

over the years i have done a few boat stringers and floors. And also outboard transoms. Floors i used pressure treated plywood and roven woven at the seams with the west system. Fasteners i used coated deck screws. Stringers i used pressure treated 2x6 or 8 or 10 or whatever size cut to fit and roven woven and west system. Transoms i used pressure treated sandwiched togethee with resin and screws. Roven woven to join and encapsulate and west resin to seal. Epoxy paint. Hope this helps. Good luck👍

how long have you run those rigs with pressure treated stringers? Ive heard a lot of rumers about gc pressure treated and not wanting to take to marine grade epoxies. Thanks for the input

never an issue.