I have spent weeks looking for an easy floor idea for our jon boat when the answer was really pretty easy. Most of what I came up with was marine plywood which is water resistant but it was extremely heavy and I wanted something that I could easily take out to clean out the bottom of the boat and to let the floor dry up and not start growing mold like what would happen in a permanent floor. Overall I am very pleased with the floors performance thus far and we have been out on the bay a few times with my family of 5. It holds up great and the foam is surprisingly strong especially with the mat on top of it. We are thinking of painting it the same color we are going to paint our boat for duck hunting and we spray painted a section and the mat does hold the paint pretty well. Video Tutorial:
Supplies: utility knife sharpie tape measure T or straight edge insulation boards (1 1/2 inch thickness) horse stall mat