Mouldings for the trim of exterior cornices, string-courses, and the like are often specially designed by architects for the small house, but it is a much better plan to use stock mouldings, selecting them to approximate the design that is desired. Through the efforts of many concerns the market affords many well-designed stock patterns of mouldings for exterior purposes. The idea is sound, and makes possible a great variety of designs through the standardization of parts, but at the same time cutting down the cost. Likewise the standardization of doors and windows is another economic aid for the small house. As a rule, all exterior doors should be at least 1¾ inches thick, and of white pine, painted. The veneered door is not a very satisfactory type for outside use, unless, perhaps, it is protected by the porch, for even with the best waterproof glue there is a considerable tendency on the part of the veneer to break away from the soft pine core. Some consider that the 1⅜-inch-thick door is satisfactory for exterior doors in the small house, but, generally speaking, it is best to use this thickness only for interior doors. Softwood doors, 1¾ inches thick, have panels, if they are raised, only 1⅛ inches thick; while doors 1⅜ inches thick have raised panels only ⁹/₁₆ inch thick, and flat panels ⁵/₁₆ inch thick. The latter is quite evidently too thin for exterior doors. Interior doors of veneered woods usually have flat panels, ⁵/₁₆ inch thick, except the one-panel door, which is as thick as ⁷/₁₆ inch. Such panels consist of three layers, the two outside veneers and the interior softwood core with the grain running at right angles to the veneer. The stiles and rails of well-built veneered doors are made of built-up pine blocks, glued and locked together, with a tongue-and-groove joint, and fastened at the corners with hardwood dowels. Strips of hardwood to match the veneered face should be placed on each edge of the stiles and rails. [Illustration: Stock Exterior Doors Stock Interior Doors] The common-stock sizes of doors are as follows: 2 feet by 6 feet. 2 feet by 6 feet 6 inches. 2 feet by 6 feet 8 inches. 2 feet 4 inches by 6 feet 6 inches. 2 feet 4 inches by 6 feet 8 inches. 2 feet 6 inches by 6 feet 6 inches. 2 feet 6 inches by 6 feet 8 inches. 2 feet 6 inches by 7 feet. 3 feet by 6 feet 8 inches. 2 feet 8 inches by 7 feet. 3 feet by 6 feet 8 inches. 3 feet by 7 feet.