Latest Discussions : Roofing & Siding


05:32AM | 07/07/05
Member Since: 06/16/05
140 lifetime posts
My roof has soffits but shouldnt I also have a ridge vent so the air flows better. Could someone explain the flow of air through the soffits and where it goes, etc...


06:02PM | 07/07/05
Member Since: 06/23/04
161 lifetime posts
First, the term "soffit" refers only to the underside of the roof overhang.

Second, If you have soffit VENTS allow air into the attic space, they don't do much good without a higher vent to let the air out. Such higher vents might be a gable vent, ridge vent, turbine, or vented cupola. The total free area of the higher vent should be slightly less than the total free area of the lower soffit vents. Convection will carry air up from the soffit vents and out the higher vents. The primary function of attic ventilation is to remove moisture from the attic space. The second function is to lower the temperatures. This second function doesn't do much practicle good as far as energy savings go unless you have unusually large vents high and low. This amount of ventilation is usually beyond the scope of what most homeowners are willing to install.

Your best use of money is to install a premium level of insulation above the ceiling, make good use of solar shading at windows, seal the house fom leakage, and manage your energy use. There are a lot of other energy saving moves, but these four will have the best payback.


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