I am going to be installing my subfloor soon. I have osphoed, cut rust, painted the floor with rustoleum.
My tentative plan for a floating floor:
1) Put down red rosin paper.
2) Layout 2x4s on the edges and where the plywood seams will be.
3) Put 1 1/2" pink insulation board
between the 2 x 4's.
4) Put down 1/2" plywood using liquid nails to attach it to the 2x 4s.
Here are my questions:
Is 1/2" plywood thick enough?
Do I need to put more 2x4s to support the floor or is it adequate to just have them at the edges of the plywood?
Do I need to frame 2 x 4s around the holes for toilet flange (going to a black tank under the bus), shower drain, and the fuel sending unit so the edge of the plywood is supported?
Do I need to have all of my cabinets, bunks, couch planned and put 2x4s under the plywood so they have adequate support?
Can I mount my passenger seats (which are still unknown) through the plywood and insulation and have them bolted into the metal floor or do I have to have them planned before I put down my subfloor?
TIA for any help.