Plywood manufactured with waterproof adhesive and specifically intended to survive the extreme conditions of marine locations is marine-grade plywood.
Pine and spruce are other types of wood that people frequently utilize in van construction in addition to marine-grade plywood.
Weatherproofing the van’s walls and roof in addition to its floor is crucial to ensure a long-lasting interior.
Consider adding additional insulation to your van build because wood is not a very effective insulator on its own.
You should pick a sort of wood that blends well with your van’s overall style and that you will be content with in the long run
Experienced builders advise you to make a subfloor that’s at least 3/4 inches (19mm) thick. This density provides appropriate strength and support for the van’s occupants and cargo.
You’ll want to lay a finished floor on top once you install the subfloor.