: These have open louvers and a mesh screen (to keep out birds and insects). They are essential for homes without ridge or soffit vents.
: These are solid behind the louvers and do not allow airflow. They are purely for style and are often used when a home already has a modern ventilation system (like ridge vents) that shouldn't be interrupted. 2. Material Options buy gable vents
To ensure proper airflow, builders often use the —1 square foot of vent area for every 150 square feet of attic floor. : These have open louvers and a mesh