What's the subfloor made of?

[Pele2048]

Gonna have to do some floor repair (along with some roof seam repair)

Wondering what's between me and Terra firma as I stand inside my 2004 TM 3023.

[Bill]

The floor is framed along the outside edges with wood - looks like 2x4, but I'm not sure. The floor itself is made of a top skin of aluminum attached to the top of the wood frame, and a bottom skin of aluminum facing the roadway. The gap between the two skins is filled with a slab of rigid foam, glued to both skins.

Bill

[BrucePerens]

There is also plywood in that sandwich.

[Pele2048]

Wife says the floor feels squishy in spots. (Due to the afore mentioned necessary roof repair.) I'm thinking she felt the lineoleum bubbling up.

I've got the heater set to 90 and a dehumidifier in there.

We'll see what happens when. I peel up the carpet and lino.

[Shane826]

Likely the linoleum. I had the same issue. Fake wood linoleum floor, wife swore up and down it was rotted wood. Didn’t even look that real.

And yeah, it’s an aluminum-thin plywood-styrofoam-aluminum sandwich framed with 2x4s.

[Pele2048]

I pulled the linoleum. While there is no exposed wood, there is the seam right dead center of the trailer.

Flooring under the couches and cabinets is solid. Flooring in the center has some bubbling from corrosion. Likely due to moisture getting trapped under the lineoleum or in the carpet padding and remaining trapped next to the floor.

If the plywood isn't structural (like 1/4 inch Luan or something) then I'll look at a self-leveling urethane to correct the surface irregularities and putting down lineoleum or vinyl flooring throughout.

If the plywood is designed to hold weight, I'm going to have to figure out how I'm going to replace sections of floor.

[Shane826]

It’s definitely not 1/4 inch. Think more along the lines of 1/8 inch or smaller.

[wbmiller3]

When I replaced the carpet, I had some dissimilar-metal corrosion where the steel staples from the carpet got wet and reacted with the aluminum floor. I sanded all the bad parts out and repaired with thick aluminum tape.

[BrucePerens]

The plywood is structural. It's distributing the weight of an object on the floor to a wider area of styrofoam. It's only 1/8 inch thick and is said to be made of luan wood. I had a few bumps and rust or rubbing spots. I hammered a few bumps in the aluminum down before I put down vinyl planks with double-sided tape made for vinyl flooring. In general you should just clean the floor and put something down on it, rather than overdo trying to take out bumps to the point that you weaken it structurally.