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...
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I had a conversion van several years ago and the floor had the same thing on it and it came from a RV van conversion place, just google van conversion shop in your area or the closes one to you.
