Doors and windows in your home lose energy in a variety of ways ... Conduction: In the winter, cold air literally pulls the heat from your home. Heat is absorbed through the window by the cold air outside. [arrow A] Radiance: In the summer, direct (solar) radiation pours into your home and warms the air inside. [arrow B] Infiltration: In all seasons, air moves in and out of your home through tiny cracks and crevices around your windows and doors. (A 1/16" gap around a window amounts to a hole the size of a brick!) [arrow C] Typically, windows and doors have an "R-Value" of between R-1 and R-2, compared to the rest of your home, which is typically between R-11 and R-19. Since most building codes require approximately 25% of outside walls to be windows and doors (for light, ventilation, and fire escape), that means 25% of your home is not insulated the way it should be. And it's costing you money! How to save energy and money.

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