Hi, I am after some opinions please. I am insulating the floor of my 2006 Mitsubishi Express van. I have already bought XPS foam board.
- I think I should I put reflective foil beneath the foam, so as to reflect downwards any rising heat from the valley between the ribs?
Over the foam I was thinking to put some plywood as the easiest option.
Should the plywood be ‘structural or non-structural’,
and/or ‘marine’ grade?
And how thin can i use, 10mm or ?
Is it ok for the foil-foam-plywood just to float there, or should it really be glued down at some or all stages? (i certainly don’t want squeeking, and i want to build a bed above it)