I would like to install engineered hardwood flooring over a concrete slab which is on grade. It is the first floor of the house, there is no basement and the house was built in the 1990's. I have seen vapor barrier sheets, DRIcore vapor barrie/plywood tiles, as well as other methods used underneath the engineered hardwood. Would it make sense to seal the concrete slab and then place DRIcore as well as a foam underlayment down below the flooring? Or would DRIcore or a vapor barrier with an underlayment be enough? Would it be recommended to lay the floor floating or glued down? Or if using the DRIcore, could the flooring be stapled down? I would appreciate all advice! Thank you!
I am in NYC, not in a flood zone and the backyard and front driveway are all properly graded away from the house. There doesn't seem to be any evidence of flooding or water damage. The floor is currently tiled. But I think that was an aethetic thing, as the former owner tiled every room of the house including the second floor.