Hi All,
I'm gathering materials and have come across some free 1/2" OSB and 2x4s. I was wondering if these are suitable for the floor of the trailer. I'd probably rip the 2x4s so I can get 1 3/4" insulation in there. I was thinking about building a frame with the OSB to the inside of the trailer and then cover that with a laminate or some other interior finish product. After I glue the insulation into the frame, do I need to have another sheet of plywood on the underside? Or do I just use some sort of undercoating on the insulation and frame? If I need to enclose the insulation completely with plywood, is OSB suitable for that?