Attic Ventilation and Roof Lifespan

LIVERMORE — When it comes to roof replacement, one aspect that’s often overlooked is attic ventilation. While not as well-known as other roof components like shingles, attic ventilation is nonetheless crucial to ensure a roof reaches its maximum lifespan. That’s why the United States Housing Authority recommends installing one square foot of attic ventilation for every 300 square feet of attic floor space.

So, what makes attic ventilation so important? Here are two reasons:

1. Heat rises, which means any heat that enters the home will eventually make its way into the attic. Without proper ventilation, heat buildup in the attic can cook the roofing shingles from the bottom, resulting in accelerated deterioration and premature failure of the roof.

2. Like hot air, vapors such as condensation from a hot shower also rise and end up in the attic. Without proper ventilation, condensation can get trapped in the attic and develop into mold and/or dry rot, which can gradually weaken the roof.

Now that you understand the impact hot air and condensation can have on a roof, be sure to talk to your roofing contractor about attic ventilation when planning your next roof replacement project.