Red, for what its worth I fitted my floor with 4mm anti-slip altro vinyl. I also cap and coved it. The walls I insulated and then used 3 layers of 6mm marine ply so to get the shape of the van. I tried 18mm ply but surprise surprise it wouldnt form. I painted the walls with about 6 coats of concrete paint. I am sure there was better stuff to use but I cleaned a mates rug for him and he got me the paint for free in return. I re-enforced the roof so that it would take my hose reel upside down and so saving a lot of space. I need a lot of space on the floor as I clean a lot of rugs and when I can, try to roll them and not fold them. Also with a stronger roof I have my spare wand, all brushes and my SX-12 fitted to it. I do add at this point that with all the extras, water storage, water pumps, fuel tanks etcetera etcetera I spent about £3,000 to kit it out. A lot but money well spent as I get work from designers on just how the van looks, anyway, best, Dave.