A soffit vent is an intake vent installed under a roof overhang. It allows outside air to enter the attic near the eaves so warmer, moist air can exit through exhaust vents higher on the roof.
Why It Matters
Soffit vents are often the starting point for attic airflow. Without enough intake, exhaust vents may not work well, and the attic may be more prone to heat and moisture problems.
Common Problems
Common problems include soffit vents that are blocked by insulation, paint, debris, or poorly installed materials. Some homes also have too little vented soffit area, which means the roof may have exhaust vents but not enough intake air to make the ventilation system work properly.
Building Codes & Industry Standards
Residential building codes generally require attic ventilation unless the roof assembly is designed as an approved unvented system. The amount and placement of intake and exhaust ventilation should be evaluated together.
Exterior Echelon Notes
Exterior Echelon reviews soffit vents when evaluating roof ventilation because intake is just as important as exhaust.
