Intake Ventilation

Intake ventilation is designed to bring fresh outside air into the attic. As warm air naturally rises and exits through the exhaust vents near the roof peak, cooler outside air enters through the intake vents to replace it.

This continuous airflow helps maintain a balanced ventilation system throughout the attic.

Without adequate intake ventilation, exhaust vents cannot perform efficiently because there is not enough replacement air entering the attic.

Where Is Intake Ventilation Installed?

The most common location for intake ventilation is the soffit, which is the underside of the roof overhang.

Common intake ventilation products include:

• Vented aluminum soffit

• Vented vinyl soffit

• Continuous soffit vents

• Individual soffit vents

• Edge intake vents used on homes without traditional soffits

  
  

The type of intake ventilation used depends on the design of the home and the available airflow.

Why Is Intake Ventilation Important?

Proper intake ventilation helps:

• Supply fresh air to the attic

• Improve airflow throughout the roofing system

• Reduce attic heat during the summer

• Remove moisture during the winter

• Improve the performance of exhaust vents

• Help reduce the potential for ice dams

• Extend the life of the roofing system

Without sufficient intake ventilation, even the best exhaust ventilation system cannot perform as intended.

Typical Cost

Intake ventilation is typically evaluated during a roof replacement or when replacing soffit materials.

The cost depends on the home's design, the amount of ventilation required, and whether new vented soffit or other intake products need to be installed.

Why It Matters in Michigan

Michigan's changing seasons create significant temperature differences between the attic and the outside air.

A properly designed intake ventilation system helps maintain continuous airflow, reducing excessive heat during the summer and moisture buildup during the winter. This balanced airflow also helps support the overall performance of the roofing system.

Our Recommendation

At VanderLaans, we evaluate both intake and exhaust ventilation before recommending improvements to an attic ventilation system.

Adding more exhaust vents without providing adequate intake ventilation rarely solves ventilation problems. A balanced system is the key to long-term performance.

Did You Know?

Many homeowners think adding more roof vents automatically improves attic ventilation. In reality, exhaust vents can only remove as much air as the intake vents allow into the attic. That's why proper intake ventilation is one of the most important parts of a balanced roofing system.