All dimensions of this house are multiples of 31/2 feet. Wall, door, and window sections might be prefabricated so that erection would consist merely of bolting the sections together, or the house can be built in the ordinary way. The sketch at the top of [p. 41] illustrates the use of sheet metal as an exterior covering, the one in the center shows concrete blocks, and the bottom view shows the walls covered with a combination of lap siding and shingles or wide boards.
The flat roof should be covered with good roofing and well-insulated for comfort in both summer and winter as described in the working drawings. The cost of the insulated flat roof should not be greater than that of an ordinary pitched roof without insulation. The accumulation of snow will help to keep the building warm.
[23] Prepared by Albert Frey for the Bureaus of Agricultural Engineering and Home Economies, U.S. Department of Agriculture.