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Windows look simple—their basic components are only frame, glass, and hardware—but they are actually quite complex. Think about what we ask windows to do: allow us to look outside; let in light and air; keep out wind, rain, and snow; control sunlight; and provide some measure of security. To accomplish all of this, they have many features that work together elegantly.
The many kinds of windows available function in a variety of ways. At their simplest, all windows have frames and glass, and most have some weatherstripping. Windows used for ventilation may also have screens to keep insects and debris outside.
Window frames are made of wood, aluminum, vinyl, or a combination of materials. Wood insulates well but it also weathers, so some windows have wood on the inside and vinyl or aluminum on the outside. If you need to replace windows, consider how each material performs in your climate, but take care to choose a replacement window that is similar in appearance to your home’s other windows.
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