The floor the was filmed for Renovation Nation!

New construction, passive solar design, this floor is poured one inch thick on a new concrete slab.  The concrete has hydronic heating tubes that heat the house.  The back half of her house is finished concrete, which does act as thermal mass, but she says the earth is warmer. 

"We so enjoyed working with Sukita on our earthen floor.  She is a delight and I now share her passion for earthen floors.  In fact if I knew then what I know now I would have put earthen floors on my entire main floor, instead of some earthen floor and some concrete.  Earthen floors are fabulous with radiant floor heating too!"