What would u recommend?

theoldwizard1 wrote:
Some of the early "light" TT used some kind of "composite" floor. They became very soft within a year ot two.

Most (all?) have gone back to 3/4" plywood.

Not true at all.

When people are talking composite floor, that's composite as in laminated. Beaded styrofoam in between an aluminum tube structure, with plywood laminated top and bottom the same as a sidewall. Typically a little thicker on the tubes and foam than sidewalls, 1.5" or 2" foam as opposed to 1" on the sidewalls, and 1/4" or 5/16" plywood top with 1/8" plywood bottom. All laminated together with contact adhesive and either pinch rolled or vacuum bonded.

Plenty of manufacturers are still using laminated floors. Chances are if your trailer has laminated sidewalls with a fiberglass / filon exterior, you also have a laminated floor.

Midway of the 2017 production year Forest Rivers Rockwood division eliminated laminated floors and went to 5/8" plywood, actually OSB. According to a Rockwood rep I discussed it with at the time, that was done more for savings on manufacturing cost than problems with the construction. It's a lot faster and cheaper to lay down sheets of plywood/OSB than to fabricate laminated floors. This allowed them to add more frill, like solid surface counter tops and other things they changed at the same time, without substantially increasing price points and maintaining bottom line. Personally if I would have known they were making the change to solid floors I most likely would of held off on our purchase of our early 17 Roo which has the laminated floor.

Lightweight is nothing more than a marketing buzzword. In most cases so is 4 season, arctic package, aerodynamic cap, fuel saving underlining, 1/2 ton towable, etc etc etc. My Rockwood Roo Hybrid is advertised as "lightweight" despite it weighing substantially more than trailers of the same size that are not marketed as "lightweight".