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Q I’ve noticed that my soffit vents look dirty. Do I need to clean them, and if so, what is the best method?
A Yes, you should clean soffit (eave) and other types of attic air intake vents at least every couple of years, if not annually. The best way to clean them is with blasts of compressed air to blow away dust, dirt and any loose insulation that may have fallen into the soffit area.
Attic ventilation is critical to the health of your house. It begins with soffit vents that inhale outside air—necessary to create an airflow that moves warm attic air out the roof vents. Once the air enters the soffit, it usually proceeds through an air chute or some other opening along the underside of the roof into the attic where it helps push warm attic air out the roof vents. The plastic air chutes ($1 each from home centers and building suppliers) in each rafter space keep the air path clear between the rafters and the roof sheathing.
The benefits of ensuring good attic airflow are fourfold:
Reduces moisture buildup that prevents mildew growth and rot on your roof’s framing and sheathing
Reduces cooling costs during hot weather, which can be dramatic if your attic is underinsulated
Extends shingle life by keeping the roof cooler in hot weather
Reduces ice dams and the potential damage they cause during snow season.
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