How to fix house windows?

Should you replace?
It is often assumed that an old double-hung wood window should be replaced in order to achieve long-term energy savings. Before you replace your venerable window, consider:

A double-hung window that uses chains or ropes attached to sash weights may seem old-fashioned, but with maintenance every few decades this weight system can last for centuries. Newer windows are often more difficult to repair.

Older windows have single glazing, which does not insulate as well as double glazing. However, most energy loss is usually through gaps between sashes and the frame or between the frame and the house; energy loss through the glass is usually a lesser factor.

By adding a good-quality storm window, you can achieve much of the insulation of double glazing, plus extra protection against air infiltration through gaps. If you also take steps to weatherstrip your window, you will end up with a window that seals at least as well as most new windows - at a fraction of the cost.

Starting with glass replacement this section will take you through all the basic repairs, both minor and major. You'll find instructions for restoring double-hung, sliding, and casement windows, as well as wood and metal storm windows.