Attic Ventilation – What it is and why it’s important

One of the best ways to prevent condensation on your roof deck is to invest in proper attic ventilation. Even though the roof may be properly vented, poor attic ventilation can cause your energy bills to skyrocket and promote condensation build-up leading to water damage.

The importance of attic ventilation

Poor ventilation in the attic can cause hot and humid air to remain stagnant in the space. In cold winter months, humid air hits the cold roof deck before it condenses. This condensation buildup usually results in frost formation. Eventually, the frost melts and condensation leaks become an issue in your attic.

One of the signs to look out for is frost on the nails and underside of the roof deck. This occurs simply because of poor attic ventilation. Condensation can cause interior water damage, especially in cold and humid climates. Unfortunately, many homeowners don’t understand the value of proper attic ventilation. You must have the right balance of intake and exhaust ventilation to keep your attic and overall the roofing system in good shape.

Watch out for blocked soffit panels

Soffit panels are often found in homes installed around the perimeter. Sometimes the soffit panels are not properly installed and lack vents to boost air intake. Soffit panel vents allow cool air to be pulled into the attic space. Another issue is vented soffit panels that have been blocked by wood or insulation. When the panels are blocked, they prevent cool air from being pulled by the exhaust vents into the attic space. Attic inspection must be done regularly to identify issues like this, which compromise your attic ventilation and roofing system.

What are attic baffles and why are they needed?

Attic baffles are installed in vented soffits and help to keep the insulation away from the soffit vents. They work to help maintain the flow of air into the attic.

Importance of exhaust ventilation

Exhaust vents pull cool air from the soffits. Unfortunately, many roof installers lack the skill and knowledge to properly install these vents. Poor installation can wreak havoc because it disrupts the flow of air through the attic space. It can lead to costly interior and exterior damage.

We’ll take a look at two poor installation techniques that could ruin your attic ventilation.

Cross ventilation

Some installers place exhaust vents on the opposite sides of the ridge. This set up is ineffective because the exhaust vents pull air from each other instead of from the intake vents down at the soffits. This means that less hot air and moisture is pulled from the attic space promoting mould growth.

Mixed ventilation

Exhaust vents are not all created equal. The stronger exhaust vents may pull air from the weaker vents which interferes with the circuit of the system. When air is pulled from the weaker vents instead of the intake vents, it may lead to deterioration of shingles because of moisture build up and mould growth.

To minimize condensation in your home, inspection must be done to ensure that there’s a proper balance of attic insulation and attic ventilation in the space. Contact a reputable company that offers roof repair in Burlington to perform an inspection if you believe that condensation is an issue in your home.