Why Do Roof Soffits and Fascia Require Venting?

Most parts of the roof require ventilation, particularly two components — soffits and fascia. In today’s post, the roofing and vinyl window installation contractors at Timberland Exteriors share a look at these two components and why they need proper venting.

What Are Soffits and Fascia?

Soffits are the boards that cover the overhanging part between the rafter tails and the exterior wall. For most sloped roofing styles, this creates a finished look. It also protects the attic from dust, debris, and from being accessed by birds, insects, and small animals. Fascia, on the other hand, is the board that covers the rafter tails. Like soffits, fascia helps create a finished look to the roof edge. It is also the part where gutter hangers are hung.

Why Do Soffits and Fascia Need Ventilation?

In addition to being aesthetic additions and adding a clean edge to a vinyl siding installation, soffits and fascia play a role in the roof’s upkeep. The soffits, in particular, have intake vents that work with the exhaust vents located at the roof’s ridge. As the exhaust vents release warm and humid air, it creates negative pressure within the attic that pulls cool and fresh air through vents in the soffits.

Since most of the roofing structure is made of wood, proper ventilation can help prevent damage caused by heat and moisture. Condensation in the attic, for example, can weaken the roof framing. Most types of roof insulation can be damaged by moisture and result in clumping, leading to gaps that allow heat leaks. Trapped heat and moisture can contribute to warping, rot, and mold growth.

While the fascia is located along the roof’s outer perimeter, it can be vulnerable to the same kind of damage described above. Given that it’s exposed to outdoor conditions while carrying the weight of the gutters, it has to have some resistance to moisture — which can be facilitated through proper ventilation.

Timberland Exteriors is your leading provider of roofing services, including storm damage restoration. Give us a call at (651) 374-9858 or (218) 514-5177. You can also fill out our contact form to schedule an appointment. We serve customers in St. Paul, MN, and the surrounding communities.