Windows—Repair or Replace Them

Repair it or Replace it?  Homeowners must ask this question before repairing or replacing any window in their home.  Old single pain windows may not need replacing is they can easily be repaired.  It is true that older windows with single glazing do not insulate as well as double glazed windows.  However, what most homeowners do not realize is that the majority of energy loss is not through the glass, but through gasps, and cracks between the sashes and frame, and between the frame and the house.  If the older windows enhance the architectural appeal of your home, then by all means, repair the windows and install good quality storm windows, which will provide better insulation than most new double glazed windows.  In addition, storm windows provide extra protection against air infiltration through gaps. 

If your existing window frames are badly out of square, then replacing your windows may be your best option.  However, before you install new replacement windows, the openings will need to be made square.  This will involve removing the existing windows, both the inside and outside trim, as well as the window jamb.  If you do not square the window openings before installing your replacement windows, they too will be misaligned and may not fit. 

If the existing jambs, exterior trim, or sills are rotten, cracked, or severely damaged, then it may be less work and less expensive to simply remove the existing windows and install new replacement windows.

If your existing windows are small and you want to allow in more light into your home, then yes, you will need to replace your existing windows. 

When installing new replacement windows, if your existing windows are wood, then you may be able to leave the jambs and molding in place and remove only the sashes.  However, if you have aluminum windows or vinyl windows then you will have to remove the entire window unit. 

If the problem you have is a foggy double-pane window, before you do anything check the warranty on your windows.  You can usually find your warranty on your window receipt.  Most double-pane windows come with at least a ten-year warranty.    If your windows are still under warranty, then contact your window manufacture and have them replace the window at the manufacture’s expense. 

Fog forms in double-pane windows when the thermal pane seal fails, and condensation is trapped between the panes of glass.