Quote:
Originally Posted by bret
One additional logistical problem with "adding" floor heat over an existing slab...unless the slab is specially insulated in preparation for floor heat, the frozen ground will suck the heat out from under the concrete as fast as you can put it in.
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That was something I was concerned with and it makes sense as I can leave the heat on 75 for a week and the floor is still 40 degrees!