Windows admit light from the sun and the sky, including reflected light. Windows affect the comfort of the family, both physically and psychologically. They are, moreover, a very important influence on the design and the structure of the house.

From a physical aspect, windows are expected to admit daylight in desired quantities and to provide a means of ventilation. At the same time, cold air leakage around window openings in winter and heat gain through glass in summer must be minimised.
From a psychological aspect, windows are expected to provide an outward view, but with necessary provisions for privacy.

Windows should be acceptable in architectural appearance, both on the inside and the outside of the house. They should, moreover, be of such measurements that they can be used efficiently with other building materials.

Selection of the types and sizes of windows and their placement depends on how the various windows are to be used. These requirements frequently are at cross purposes; for example, the placement and size of a window for maximum daylight may not coincide with placement and size for maximum ventilation or for enjoyment of a view. A compromise can be reached, however, by careful planning.

Several factors, including initial cost, influence the choice of windows for a house. In making your selection, consider whether the window:

• Can be used to provide daylight in adequate amounts.

• Can provide desired ventilation.

• Is free from objectionable obstructions to view.

• Can be economically adapted to construction techniques to be used.

• Is fitted with hardware which makes operation of the window easy and is weather-tight when the window is closed.

• Can be opened without interfering with draperies and blinds or furniture placement.

• Can be easily fitted with screens and storm shutters, if required.

• Can be easily washed.

• Can be inexpensively maintained.

1. Sliding

2. Hinged

3. Fixed

To assure precision fit, operating windows should be factory-made and installed in accordance with the manufacturer's instructions.

The following pages set forth principles for selection and placement of windows from the standpoints of daylight, ventilation, view, and appearance.