The Importance of Roof Ventilation

Ventilation may not be the first thing that comes to mind when you think about your roof’s upkeep, but poor ventilation is among the most common causes of roofing problems. In today’s post, the local roofers at Renaissance Roofing, Inc. discuss what makes ventilation an important element of roofing design.

Why Do Roofs Need Vents?

Heat naturally moves upwards, which means warm and humid air tends to collect at the building’s highest point — the attic. If not vented, trapped heat in the attic can cause damage to the parts of the roof that are vulnerable to heat and moisture, which includes the framing and insulation. It can also encourage mold growth, which can spread into the living areas. During winter, trapped heat can radiate through the roof, melt the snow on top and cause ice damming at the roof edges.

In a standard roofing system, warm air is released through exhaust vents at the roof’s highest points, utilizing the natural rising motion of warm air. The resulting difference in air pressure then pulls cool air through intake vents located at the soffits. If a passive system is insufficient, mechanical ventilation through exhaust fans may be needed.

Ventilation Can Help Prolong Your Roof’s Life

A well-ventilated roof is one that doesn’t give any trouble. We have mentioned earlier how trapped heat and moisture can cause structural damage to the roof, sight unseen. Roof framing built with timber, along with some types of insulation, are particularly vulnerable to moisture damage. Proper ventilation can help prevent an unplanned roof replacement, and may even add a few years to its life span.

Can Poor Ventilation Be Corrected?

Sometimes a roof may have inadequate ventilation, perhaps due to poor design or later changes to the house that didn’t account for changes to its roofing ventilation requirements. Fortunately, poor ventilation can be corrected. Ridge vents can be replaced or added without affecting the other parts of the roof. Exhaust fans can likewise be installed on a roof if needed. Since every home has different roof ventilation requirements, having your roof inspected by a professional will help determine the right ventilation system for it.

Renaissance Roofing, Inc. is one of the most trusted roofers serving Salem, Oregon. Learn more about our services, including roof leak repair, give us a call at (541) 791-4886, or fill out our contact form to schedule a consultation. We also serve communities in Albany and Eugene, OR.