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Hydronic Radiant Heat Retrofit on uninsulated concrete slab basement
I am planning on installing a hydronic radiant floor heating in my basement on top of existing concrete slab. The slab is not insulated, and we live in MN where it is quite cold. Currently the slab temp is ~45F.
The ceilings are about 8' tall, and in some areas ~7'3" due to soffits. I don't want to lose much ceiling height to install the system.
I am looking at Warmboard and ThermalBoard. I am wondering what insulation and thermal barrier to place underneath and what experience others have.
I have about 1100sq ft of area needed to be heated. I do have forced air as my "primary" heating system. This is mainly to keep the floors feeling warm and ensuring there is not a chill on your feet.