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Inspecting  Window Seals

 

Many newer windows have more than one pane of glass. The area between each pane is either airtight or filled with an insulating gas thus creating a temperature barrier.  If the seal around the pane is “broken” it can allow air and/or moisture to enter and reduces the thermal efficiency of the window.  Replacing the seal is a job for a professional window glass contractor; however, a homeowner can perform a quick window seal inspection a few times a year as follow:

  1. Carefully inspect each window visually for the presence of condensation or water spots between the panes.  Windows with broken seals often appear foggy.
  2. On a cold day, touch the outside of each windowpane.  If any of the panes feel warmer than the others, it maybe allowing heat to exit the home through a failing seal.  Look closely for distorted or damaged neoprene (the synthetic material resembling rubber )around the edges of the pane.

As necessary, have a professional home inspector provide a second opinion before buying a replacement pane or window.  Most units will require removal and replacement instead of permitting for an on-site repair.

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