Do You Need Attic Ventilation With Spray From Insulation?

January 10, 2021

If you’ve decided to have spray foam insulation added to the attic in your Richmond, TX, home, you might be wondering whether or not you also need to add active or passive ventilation to the attic. It’s important to consider attic ventilation because a buildup of moisture or heat could result in significant structural damage or a shorter roof lifespan. Here’s what you need to know about spray foam insulation and the airflow in your attic.

How Spray Foam Insulation Works

Spray foam insulation is highly effective because it expands to fill tiny gaps and hard-to-reach spaces where air can infiltrate into your home. It forms a tight seal, creating an airtight building envelope. This is good for reducing unwanted air exchange and lowering your heating and cooling costs, but it’s bad for moisture buildup and condensation.

Humidity Buildup in the Attic

If you’ve installed spray foam insulation in your attic, humidity and condensation will build up in the space. It only takes an air temperature of 79 degrees Fahrenheit for the moisture to condense. This condensation will rot the wood joists and beams. It will also cause the roof’s substructure to quickly deteriorate. That’s why you need an active and passive ventilation setup in your attic after installing spray foam insulation.

Which Ventilation Systems Your Attic Needs

After installing spray foam insulation in your attic, you’ll need both passive and active ventilation. Some good passive ventilation options for your attic include roof edge and peak vents. For active ventilation, consider an attic fan.

At Air Express Air Conditioning & Heating, we’re the trusted providers of home performance systems, including insulation and ventilation services in Richmond. Homeowners also turn to us for reliable heating and air conditioning maintenance, repair, installation and replacement services. Our indoor air quality solutions keep your home cleaner and healthier. If you’re a local business owner, you can also turn to us for commercial heating, ventilation and air conditioning services. For additional information about attic ventilation needs after the installation of spray foam insulation, get in touch with us at Air Express Air Conditioning & Heating.

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