Corrugated floor insulation foam board
I am building an RV out of a Chevy Express conversion van. Parts of the ribbed metal floor came covered with a corrugated foam board which matches the metal perfectly so it results in a flat top, idea...
Forum Discussion
Foam boards are commonly sold at artist supply stores for using as poster boards. You still need to put down plywood screwed or bolted through to the metal floor ribs. The suggestion to use Dynamat or Hushmat is a good one, It is a black rubberized sheet of about 1/8" thick faced with aluminum foil. It adheres to the metal surface and you follow the ribs rather than bridge them. It makes for great sound deadening as well which what it is primarily for.
