An essential part of a sustainable renovation or retrofit is installing quality, energy-efficient windows.  It is no secret that windows are responsible for many leaks in a building envelope and often show up as a deficiency in home energy audits.  There are a few major attributes that an energy-efficient window will have in order to eliminate drafts and help maintain indoor temperatures.

The most recent innovation in efficient window technology is a triple glazed, vinyl or fiberglass fra...


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