My floor thoughts

[opus]

Trying to think this all out before I actually do it. Pull the old rubber/wood, clean and paint. Next would be red rosin paper then 1 x 2's window to window. Pink board will go between them, then a vapor barrier and then 1/2 or 3/4 plywood, attached to the 1x2's. There will be a gap along the walls and back, allowing movement, etc.

Make sense or am I off somewhere?

[opus]

What size "floor joists" would you recommend? I was thinking of ripping 2 x 4's.
3/4" plywood...fine.

[bodaver32]

I ripped 2" x 4" s and drilled pilot holes to keep from spliting. I used the triple coated deck screws with 6 lobe heads. The are strong and drive great.

[opus]

The reason I want floor joists is that after a while I am afraid the insulation will break down and compress in high traffic areas. I wont be fastening anything to the main bus floor.

[zman18]

I would say no need to put down floor joists. The plywood could be fastened straight through the insulation and to the sheet metal floor. Thats how I did it. The plywood will distribute weight and wont damage the insulation. Do what you are comfortable with though.