Insulating with rigid foam over subfloor
I am doing some renovations in a small area. There is existing 1/2″ plywood subfloor. I want to insulate the floor while still preserving head space in the room. I want to make a subfloor – styrofoam board insulation – Luan sheathing sandwich above the subfloor then topped by Carpet Tiles. What is the minimum recommended width for the styrofoam insulation and the Luan to protect from damage from walking on the floor.
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