About 30 minutes ago I reached a milestone with the camper project. Here you see the floor glued and stapled down. It’s made up of plywood, rigid foam, and plywood. It would have been much easier to just use 3/4″ exterior plywood and be done with it but this should be just as strong or stronger and is insulated. Next I guess will be to polyurethane the living daylights out of the top and sides. There is a thing called “the mix” among camper builders where you mix polyurethane with mineral spirits to thin it and that soaks in really well to seal the wood forever. I will do that here.