A Colorado building contractor has launched his own program for survival in the atomic age by incorporating low-cost reinforced concrete fallout shelters as integral elements in forty new homes under construction. Cast as part of the foundation structure, the 12 inch concrete ceiling of the shelter forms about one half the garage floor. Plywood panels used to form the basement walls were reused to form the shelter ceiling. While this was custom cut for the first home, its reuse on the other 39 shelters to be constructed will allow depreciation of its cost. The fallout shelter room is believed to appeal to home buyers because it readily lends itself to many every day uses. Three of the homes were already sold long before the model structure was completed and in each case the shelter it what closed the sale.