Foam Core Floor Repair. Epoxy?

[wowens79]

I’m looking to repair some soft spots in my floor. It is not water damage, but where the foam has compressed in heavy use areas.

I’ve seen a couple of YouTube videos where they drilled a grid of holes in the floor and pumped an epoxy resin in there and supposedly when it hardens up it is good to go.

Has anyone tried this, and does it work? These guys did it from the top and you had to put new flirting down, but I’m thinking is I came from the bottom I might could save the flooring.
Thanks

[SDcampowneroper]

Yes I have fixed a foam core floor in our 87 Award. I drilled from above and below just through the ply, then injected foam conpatible adhesive. Worked good, but we did have to refloor inside.
You could try doing it by drilling up through the bottom ply and foam then injecting, wait to set then drill again only through the underside ply to inject again. A nozzle to make certain the adhesive goes up to the top, and does not spread into the lower area is something to consider.
Test --- Try your adhesive on samples so you know amount and compatability. Cant have a adhesive that foam does nt like. Too much adhesive could cause the floor to swell. A flexible urethane minimal expansion foam should do. Small squirts, close together. Get some 1/4" ply, foam and experiment before you try it out on the camper.

[Gdetrailer]

Doubt it would work for long, resins without some reinforcements like fiberglass tend to be brittle and will just crack and shatter under the flooring.

I suspect, if you plan to keep the trailer for a long time, doing it right the first time by removing any weakened damaged material and replacing with new heavier material will be much better in the long run.

You have to start with a good "foundation", weak foundation will simply fail again and with resins it will make the next repair more difficult to do.