Proper ventilation is one of the most important aspects of your roofing system. An improperly ventilated home, no matter how high quality the shingles put on, is one of the leading causes of moisture, mold and mildew problems. Proper attic ventilation systems allow a continual flow of outside air through the attic, protecting the efficiency of the insulation and helping to lower temperatures in the living space.

It consists of a balance between air intake (at your eaves or soffits- “bottom of the roof”) and air exhaust (at or near your roof ridge- “top of the roof”).

The U.S. Federal Housing Administration recommends a minimum of at least 1 square foot of attic ventilation (both intake and exhaust) for every 300 square feet of attic space. For example, if your attic is 900 square feet, you need a total of 3 square feet of ventilation.

It is estimated that 9 out of 10 homes in North America do not have proper attic ventilation. Why? Because most people are unaware that attic ventilation can impact the longevity of their entire home.

In some ways, roof ventilation is as much as an art as it is a science, and installing your own roof vents based on something you read online is like trying to diagnose a skin rash using WebMD. Twin City Roofing has been installing roofs throughout Minnesota for over 25 years and our expertise will yield you a much better result for your roof than any research study or online “expert.”