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How to Clean Soffit Vents

Blow out debris from your soffit (eave) vents to maintain good attic ventilation. It’ll save on air conditioning costs in summer and protect your roof from condensation in winter.

By the DIY experts of The Family Handyman Magazine

Clean your soffit vents to improve attic ventilation

If you notice that your soffit vents are dirty, don’t wait. 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 (See “How Attic Venting Works” below). The plastic air chutes (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 under-insulated
  • Extends shingle life by keeping the roof cooler in hot weather
  • Reduces ice dams and the potential damage they cause during snow season.

Good attic venting

Good attic venting

How Attic Venting Works

With good venting air flows up through the soffit vent and along the underside of the roof into the attic. It mixes with attic air and flows out through roof vents or a ridge vent higher up. This cools the attic in the summer and flushes out moisture in the winter.

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Required Tools for this Project

Have the necessary tools for this DIY project lined up before you start—you’ll save time and frustration.

    • Air compressor

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September 07, 12:05 AM [GMT -5]

am wondering if cleaning these vents will help to get the wind turbins on the roof turning once again?

July 06, 7:56 PM [GMT -5]

All contractors agree, the number one problem with Attic Ventilation is clogged, dirty Soffit vents. It’s a FACT… All attic efficiency items like radiant barriers, insulation, attic fans etc… WILL NOT perform without sufficient consistent intake air!
Finally, there is a one time solution for the life of the home. Superior Soffit Systems offers the Only Serviceable, Cleanable and Reusable soffit vent system. Check out this product at www.Superiorsoffit.com.

July 06, 7:54 PM [GMT -5]

All contractors agree, the number one problem with Attic Ventilation is clogged, dirty Soffit vents. It’s a FACT… All attic efficiency items like radiant barriers, insulation, attic fans etc… WILL NOT perform without sufficient consistent intake air!
Finally, there is a one time solution for the life of the home. Superior Soffit Systems offers the Only Serviceable, Cleanable and Reusable soffit vent system. Check out this product at www.Superiorsoffit.com.

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