The materials you build your home with can offer more than just structural support. Some materials with a property known as Thermal Mass can absorb and retain heat for later use. Dense materials such as a concrete slab and internal masonry walls allows heat to be stored during the day for release in the evening when the house is naturally cooling. This heat retention can delay or alleviate entirely the need for heating, creating a naturally warmed or cooled home.
6. Insulation
8. Windows