Using Foam Under Tile
Is it possible and feasible to install a thin layer of XPS foam (e.g. R5) with a reflective side under our basement tile; e.g. in the bathroom. We're finishing up work on our basement and budget restraints have kept us from tearing out the entire slab and installing radiant heat with an insulation underlay. In place of this, I'm thinking simply install an insulation layer over our current slab and tile on top thereby reducing some of our heat loss and keeping the floor "warmer". We'll be installing a floating cork floor in the other sections of the basement for our son's play area. Any advice for "walking" on foam? Thanks.