Why Is Roof Ventilation So Important?

Mimms Roofing - Roof and Attic Ventilation

A properly vented roof is a key component of every well-built home, yet adequate ventilation is a commonly underappreciated task – or worse, a completely neglected one. However, it’s important to set the record straight: Proper ventilation can make all the difference in your home. It can reduce your energy bills, extend the life of your roof itself, and prevent costly repairs down the road. Here’s what every homeowner should know about roof ventilation:

How Does Roof Ventilation Work?

Throughout the year, your roof goes through many changes as the weather and climate shift. In the summer, your attic can be unbearably hot, reaching temperatures as high as 160 degrees. In the winter, the temperature drops, but moisture increases, particularly during periods of rain or snow. Proper roof ventilation helps circulate stagnant attic air with fresh air from outdoors, which helps lower temperatures in the summer, reduce moisture levels in the winter, and prevent expensive issues like ice dams from forming during periods of freezing rain or snow.

Is Your Attic Properly Vented?

At this point, you’re probably wondering if your home is vented as it should be. Unfortunately, there’s no strict answer because each home is different. To determine the best ventilation setup for your attic, you should consult a professional for an inspection. As a general rule of thumb, however, you should have 1 square foot of vented area per 300 square feet of attic space. However, this number may vary based on your home design. You can possibly have too much ventilation, which opens up your home to more issues, such as leaks and drafts.

How Can a Poorly Ventilated Attic Damage Your Roof?

Without proper attic ventilation, your roof can suffer from a buildup of moisture, which can cause mold, mildew and rot. These can shorten the lifespan of your roof or lessen the effectiveness of your roof, leaving your home susceptible to leaks and moisture problems.

If you suspect that your home isn’t ventilated properly, or if you’d simply like an inspection, please call Mimms Roofing and Water Restoration at (931) 614-0538. We are professional roofers who proudly serve the Middle Tennessee and Southern Kentucky areas, and we’re happy to answer any questions you may have about attic ventilation or other concerns.


  • http://www.factsfacts.com/MyHomeRepair/ventilation.htm
  • http://www.homeadvisor.com/r/5-myths-about-attic-ventilation/#.WS4HZ1KZORs
  • http://www.aibd.org/blog/?p=160