The exterior rigid foam insulation has arrived at the Lake Quivira Passive House. For this retrofit project, we are utilizing EPS (Expanded Polystyrene) Type One foam. This type of product is very popular for insulation, and is commonly known as "styrofoam." The 3" thick sheets of foam will be installed to the exterior of the home in two layers for a total of 6" of exterior insulation. The seams between the sheets of each layer of foam will be taped to aid in airtightness. The vertical and horizontal seams of each layer will be installed offset of each other. There is a lot of styrofoam required to cover the entire home, about half of our garage's worth of foam. This product will perform excellently for our Midwest climate, and will keep the home warm in the wintertime and cool in the summertime.