Ventilation and insulation work hand-in-hand to maintain a healthy, energy-efficient attic environment. While insulation keeps conditioned air inside, ventilation allows heat and moisture to escape, preventing damage to your roofing and attic structure. Without proper airflow, even high-quality insulation can lead to mold, condensation, and wood rot.

A well-balanced system uses intake vents at the eaves (soffit vents) and exhaust vents near the roof ridge to promote continuous airflow.

Balancing Airflow and Efficiency

According to Spray foam insulation guidelines, your attic should have at least one square foot of ventilation for every 150 square feet of attic floor space. Installing baffles between rafters helps maintain this airflow, even after insulation is added.

Avoid blocking vents with insulation, as restricted airflow traps heat and moisture. In winter, good ventilation prevents ice dam formation, while in summer, it reduces cooling costs by lowering attic temperatures.

When combined properly, insulation and ventilation extend roof life, improve energy performance, and create a more stable indoor climate. Regular inspection ensures vents remain clear and effective year-round.

EcoHome Spray Foam
3601 Lebanon Rd, Lebanon, TN 37087
(615) 573-4106