What Are the Benefits of Eaves?

Shedding Water

• The extension of the eave past the wall reduces the amount of rainfall that is able to reach the foundation. When the foundation is excavated and then back-filled, it leaves increased water-permeable soil next to the foundation because it has been disturbed. If water is collected in this area, it travels down through the soil and into the basement. By moving the water away from this area, you reduce the likelihood of a wet basement.

Sun Shade

• The eave provides additional shade for the home's windows and walls. This assists in cooling the house in the summer by reducing the amount of UV rays that travel inside. It also protects the windows and wall surface from the damaging effects of the sun. Windows that are protected by eaves or covered porches have a tendency to last longer than windows that receive more sun. Vinyl windows are particularly sensitive to UV exposure because the material breaks down over time.

Insulation

• The attic space where the eave extends over the exterior wall provides room for the insulation to be installed directly over the wall. This provides additional insulation around the edges of the attic. The amount of insulation in an attic directly affects the cost to heat and cool a home. Most of a building's heat is lost through the attic because warm air naturally rises.

Ventilation

• The eave provides the ideal place to install the lower ventilation ducts for the attic. This ventilation removes moisture that prevents mold from taking hold. It also prevents ice damning on the roof surface because it equalizes the temperature in the attic with the outside.