Recently there has been some discussion of the heat-retaining quality of walls. It is advocated that openings which permit circulation of cold air between outer and inner walls shall be filled. This adds but little to the cost of building and in cold climates reduces materially the coal bill. Incidentally it also aids both in reducing the fire hazard and in rat proofing. For the latter, care must be taken that there are no unscreened openings through foundation walls into a cellar, and that all openings from the cellar to the space between outer and inner walls of stories above shall be filled with rat-proof material.
Much attention is now being given to standardizing the parts of a house, both to reduce initial cost and to make replacement easier and less expensive. Are the doors, windows and other parts of the demonstration house of standard stock sizes?
Light and Ventilation
Every room must have adequate window areas giving upon wide outdoor spaces. An interior room, or one poorly lighted from a narrow court, or receiving its only light from a wide porch, may not impress the visitor, who sees it only when the house is new and the room artificially lighted, but it does in time impress the family who inhabit it. Row houses are best when they are only two rooms deep from front to rear. If, however, an extension is built upon the rear of a row house, the court on one side of this extension, from which middle rooms are lighted, should be at least six feet wide for a two-story dwelling and seven feet for a three-story dwelling. If there is a front porch on a row house it should not extend clear across the front, darkening every window of the front ground-floor room, but should extend only part way, leaving one window free. This also adds to the value of the porch by giving it greater privacy, but of course it necessitates a house at least 18 feet wide, if the porch is to be large enough to use as an outdoor sitting room for the whole family in warm weather.
So far as practicable, each room should have at least two windows, and corner rooms should have windows in two walls.
The rooms should be planned so that they may be opened into each other and the breeze permitted to sweep through.
Privacy
While the family is a unit, and a function of the house is to symbolize and emphasize family unity, there should, nevertheless, be provision for some individual privacy. The most elementary provision, of course, is that there be at least three bedrooms—on the assumption that the normal family will contain both boys and girls. Consequently the demonstration house must contain not less than three bedrooms. But beyond this, the grouping of rooms possible in a two-story house (bedrooms and bath on the second floor, common living rooms on the first floor) as against a one-story house, adds greatly to privacy. At the same time the two-story house is nearly always the more economical both to build and to operate, while one flight of stairs does not add appreciably to the house-wife's work. With the kitchen, dining room, living room and a lavatory on the ground floor there is comparatively little need of running up and downstairs, even when there are young children in the family. A third story, an upstairs sitting room, no ground floor lavatory, do add appreciably to the amount of stair climbing.
Stair climbing is reduced by having the laundry on the same floor as the kitchen instead of in the basement or cellar. Though it is the scene of greatest activity only one or two days a week, it is often used at other times, and often in connection with kitchen work. On the score that the number of steps is thereby reduced, laundry tubs may be placed in the kitchen; but against this must be balanced the annoyance, or worse, that comes from having the kitchen full of steam and all cluttered up with clothes in process of washing when meals must be prepared. Because of this many women prefer a separate laundry in an ell or extension opening off the kitchen. From the latitude of Philadelphia south, this extension may be of light construction without danger of pipes freezing except in the coldest weather; and it is a simple matter to install a cut-off, so that these pipes may be emptied when not in use.
Sanitation