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The intersection of a roof and wall is an area where seemingly minor design decisions can have a much larger effect on a home’s feel and function. At a bare minimum, an overhang must be substantial enough to prevent rain and melting snow from soaking the siding, especially at the eaves. But from the standpoint of homeowner comfort, the most important characteristic of a well-designed overhang is the ability to control the amount of sunlight and solar heat that enter south-facing windows. Sunlight and Shadow Most houses benefit from sunlight in the cold winter months. Any heat gained from the sun cuts fuel bills while the natural light lifts spirits on short