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News We Follow: A Balanced Approach to Roof Ventilation

Posted in: news we follow

From an article in Pro Remodeler

An article in the latest issue of Pro Remodeler highlights the best way to ventilate an attic space. Often when we find mold and moisture issues in a homeowner's attic it can be attributed to not having proper ventilation. The full article can be read at the link above and below are some key points we wanted to highlight for you. 

roof ice damming

  • A roof with a balanced ventilation system has an equal distribution of intake and exhaust vents. The balanced approach helps to optimize air exchange between the attic and the outdoors, and allows for effective management of temperature and moisture inside the attic. 
  • By keeping the roof deck closer to the outdoor temperature, ventilation may also reduce the formation of ice dams, which can lead to water leaks at the eaves. 
  • Evaluated 2 ventilation schemes: balanced and unbalanced. For comparison, also evaluated a sealed attic - one without vents at the soffit or the ridge.
    • Analysis indicates that temperatures in the sealed attic without any ventilation exceeded 140 degree Fahrenheit. 
    • Balanced ventilation between intake and exhaust was more effective in reducing temperature in the attic when compared with the soffit-only approach.
    • The balanced ventilation reflected a temperature difference of more than 30 degrees Fahrenheit when compared with the soffit-only ventilation approach. 

To read the full article and see diagrams with full analysis results, visit here!

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