Best Attic Airflow Practices

A well-ventilated spray foam insulation is essential to your home’s safety, durability and energy efficiency. The building code for residential construction requires adequate ventilation to prevent moisture, heat transfer and the overworking of your heating and cooling system. Proper insulation and effective venting work hand in hand to achieve these goals.

While there are many ways to improve attic ventilation, the most effective is a combination of passive and mechanical methods that create a balanced system. The passive method relies on a natural convection flow of air. Outside air enters the attic through soffit and eave vents, rises as it warms and exits through gable or ridge vents. This airflow is enhanced by baffles that are installed at the soffit and rafter levels to direct outside air to the soffit and out the vents. This is a cost-effective and relatively simple way to improve ventilation.

Attic Heat Prevention Methods

To maximize this system, it is important that you keep the soffit vents clear of blockages. This includes paint, birds’ nests, and other debris. It’s also a good idea to use a test like the smoke pencil to observe how air moves through your attic and identify stagnant areas that need improvement.

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