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Residential Structural Certifications
& Environmental Testing |
back to Windows and Doors - in Depth
Window Frames
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The window frame holds the window sashes in
place. In all but fixed windows, the sashes slide up and down (in double-hung window or swing in or out (in casement window from the frame. The separate panes of glass are held in place by muntin (a single sheet of glass may be divided by strips of wood that look like muntins). Wood, the traditional material for window frames, provides the best insulation. Although wood frames are attractive, water and sunlight do take their toll. Even if their integrity isn't compromised by severe weather, wood frames need to be repainted from time to time to keep up their appearance. |
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Wood frame windows are sometimes clad
with metal or vinyl to protect them from weathering. All-weather metal or
vinyl window frames are virtually maintenance-free, and some types can be
painted. |
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