My son wants to install Pergo hardwood flooring in his recently purchased (30 year old) concrete slab constructed home. The forced-air heating ducts run inside the walls so I'm pretty sure that there's no heat or anything else coming up through the floor. I can't find any definitive information about what, if anything, needs to be put between the flooring and the concrete, and I'm mystified that I can't even find a mention of the idea of including a layer of insulation. Heating a concrete slab through a north eastern US winter can't be cheap. I welcome any comments and ideas.
-LS