No Soffit Intake Vents,
or Vents Painted Over and Blocked
An attic vent at the ridge only works if air can get in at the eaves. Paint, nests and missing vents shut that door.
At 71 houses, Russ’s reports noted a problem at the soffit vents, the intake side of attic ventilation. The most common title was “attic intake vents not installed” (16 houses). Obstructed vents came next, then damaged vent screens and vents painted over.
Attic ventilation in this climate is mostly about moisture. And it needs air coming in as much as air going out.
How attic ventilation works
Most vented attics are designed for air to enter low, at the eaves, and leave high, at the ridge or roof vents. Warm, moist air rises and exits; cooler outside air replaces it. When the intake is missing, the exhaust vents pull from wherever they can, sometimes from the house through ceiling leaks.
The attic ventilation myths post covers what ventilation does and where it doesn’t fix a problem.
No intake at all
In a Clackamas house, Russ found no attic intake vents. In a Beaverton house, a lower roof over the living room had an exhaust vent but no visible intake, such as soffit vents or vented bird blocks. Some houses were built with intake vents in the blocking between rafters at the wall line (bird blocks); others use a vented drip edge or intake vents on the roof itself. When none are visible, he notes it.
Adding soffit vents is a common fix on houses with boxed-in eaves. A roofer or ventilation contractor can say what fits the roof.
Painted over and blocked
In Salem, the mesh on several soffit vents was heavily obstructed by layers of paint. Russ’s report explained it significantly restricts fresh air into the attic, and attic ventilation is part of what controls heat and the moisture that leads to mold growth and shingle wear. The fix was to clean the mesh or replace the vent covers.
Each repaint adds a layer. After two or three, a screened vent can look fine from the ground and pass almost nothing. A Vancouver house had soffit vents blocked by bird nesting, spider webs and dust. Damaged screens show up too, and those let birds, wasps and rodents in.
Blocked from the attic side
Outside vents can be clear while insulation blocks them from inside. Blown insulation pushed tight to the eaves, without baffles to hold a channel open, can choke off intake. From the attic, Russ looks for daylight at the eaves and for baffles where insulation meets the roof. The attic insulation post covers insulation problems more broadly.
Real Inspection Photos
Soffit Vent Findings From Russ's Inspections
Soffit intake findings from Russ's recent reports.
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An obstructed soffit vent screen. -
Paint coating a soffit vent screen. -
Damaged mesh on a round soffit vent. -
From the attic side, insulation blocking a soffit vent. -
Mesh openings large enough to let pests in.
What Russ checks
He looks at the eaves and soffits from outside for vents, screens, damage and obstructions, and from inside the attic for intake, baffles, exhaust vents and signs of moisture. He doesn’t calculate net free vent area. Missing or blocked intake gets a recommendation for a qualified roofing or ventilation contractor.
- From the ground, look under the eaves for vent screens or slots
- Look closely: are the screen holes open or filled with paint?
- Check for nests, webs or torn screens
- In the attic, look toward the eaves for daylight or baffles
- Note whether a bath fan or dryer duct ends at a soffit
Soffit intake vents were missing, blocked, painted over or damaged at 71 of Russ’s inspections. Attic exhaust vents need intake to work. Cleaning or replacing painted screens is often simple; houses with no intake need a roofer or ventilation contractor to look at options.
The guide to what to look at in the attic before you make an offer covers ventilation, insulation and moisture together. To set up an inspection, you can book online.
Soffit Vent FAQ
