"Chris, Thank you so much for everything! The house looks beautiful! We appreciate everything you did for us and no matter how tough things got, you always stayed positive. Thank you for being so pati... » more
- Rick and Susan Hoon of Lynn Center, Illinois


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Solar Heat Gain Coefficient (SHGC)

The fraction of solar radiation admitted through a window or skylight, both directly transmitted and absorbed and subsequently released inward. The solar heat gain coefficient has replaced the shading coefficient as the standard indicator of a window's shading ability. It is expressed as a number between 0 and 1. The lower a window's solar heat gain coefficient, the less solar heat it transmits and the greater its shading ability. SHGC can be expressed in terms of the glass alone or can refer to the entire window assembly.

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