More about the walls

Here is a look at what our walls look like in a cross-section. You can see there is a piece of OSB on each side, and there are 2x4's every so often that run vertical through the wall. Then, there is a very dense foam filling in the wall. This is what gives these panels such great energy efficiency. They are only 4 inches thick, but they are so well insulated! We are using the solar heated water to heat our basement, and a fireplace for the rest of the house. The fireplace sits in the middle of the main level, and will put out enough heat to heat all the 2,200+ square feet of those two floors! The walls will hold the heat in very well, so we will be able to heat with just water & sun, and wood! Both are renewable!I can't wait to get in there!