DRIcore sub floor?
I have a 20 ft short Bluebird and am itching to get to work in a week or so on the conversion. Currently in the planning stage.
So, pull up floor, clean/derust, seal holes, then......
I was thinking of DRIcore R+ sub flooring. I like the idea of the air flow and the insulation all in one. I would probably screw each one in place with a few self taping metal screws. Then wood flooring over it.
To attach cabinets, bunks, etc I would drill a pilot hole all the way and use long metal screws all the way through.