Storing the Sun's Heat!

The heat sink is getting insulated and then insulated some more. Two layers of insulation, glued to one another and to the foundation. More insulation will be placed on the ground and then there will be "wing walls" of insulation. All to hold the solar heat, stored in rock and sand, in the cavity. Once this system is in place, we'll be pouring the concrete floors. And then, framing can happen and the "look" will take on a new form.