The Manufactured Housing Forums

I'm getting ready to do some subflooring work on our unit, and I wanted to know what the opinions are for using OSB vs Plywood in Florida locations?

Should I be concerned about using OSB, a less expensive product vs Plytanium plywood?

Any suggestion or opinions would be appreciated.

Thanks,
VB,

vbtalent wrote: ↑Sat Aug 09, 2025 8:56 am I'm getting ready to do some subflooring work on our unit, and I wanted to know what the opinions are for using OSB vs Plywood in Florida locations?

Should I be concerned about using OSB, a less expensive product vs Plytanium plywood?

Any suggestion or opinions would be appreciated.

Thanks,
VB,

In my experience, shimming the beams can help if they’ve just sagged a bit, but it’s really only a temporary fix unless the root cause is addressed. If the joists or beams are rotted, poorly supported, or the ground has shifted, you could end up back in the same spot. I’d recommend first checking for any moisture/rot issues and proper support posts, then deciding whether a more permanent repair is needed.

I remember facing a similar dilemma when replacing the subfloor in my sunroom a few years back. Living near the coast, humidity was a huge factor. I initially leaned towards OSB to save money, but after researching and talking to a contractor, I opted for plywood specifically treated for moisture resistance. It was a bit pricier, but the peace of mind knowing it could better withstand potential water damage was worth it in the long run. Avoiding warping and rot saved me from future headaches. If you need something to unwind after all that work, consider giving tiny fishing a try.