I have a tri-level house and want to insulate over the uninsulated slab. What I planned is outlined below. Please critique and give (helpfull) suggestions.
- glue over current vinyl tiles 2 sheets 4 mill plastic.
- make grid with 2x4's with 16" centers.
- fill with fiberglass batting.
- cover with 5/8" plywood
- install composite flooring such as Pergo
Louis