Proper Ventilation Ensures A Healthier, More Durable Roof

THE ANSWER IS RIDGE LINE VENTILATION

Many people believe that a roof is a sealed unit. IT IS NOT! Roofs must breathe so that hot air is transferred outdoors in the summer and water vapor is expelled in the winter. Ventilation is so very important because it permits air to enter through the soffit eave vents and flow out through the top ridge line venting in a Title 24* approved roof. There is scientific modern day proof indicating that ventilation is more important than ever before in reducing energy costs, preventing mold and mildew and cooling the attic area on very hot days. Your ridge line, when it is built with attractive ridge line venting that extends the length of the roof top, acts as a permeable membrane keeping wind-driven rain out yet letting your attic area expel moisture by permitting air to flow upwards from the soffit vents during the winter months. Then during the summer months it allows the roof to expel hot air by allowing it to flow from the soffit vents up and out of the ridge line built into the top of the roof. This encourages energy conservation and will lower your utility bills.

Ridge Line Ventilation

Typical Eave Vent

Eave Vent at Soffit

During the summer months, temperatures in the attic can rise to 160 degrees or more building up heat that can cause premature aging and cracking of wood and other roofing materials. Unwanted heat can also transfer back down into living areas reducing energy efficiency. During the winter moisture migrates to the attic from shower stalls, washing machines, dishwashers and cooking. Damp air that causes mold and mildew and hot air need to be removed. Your roof needs improved ventilation.

TYPICAL RIDGE LINE VENTILATION BREAKDOWN

The only way to combat these problems is with a balanced Top of the House® roofing system. That means it is important to have proper ventilation, plus the right amount of attic insulation to maximize performance.



In a balanced system like this, wind blowing over the top ridge creates negative pressure that draws the warmer air (or moisture filled air) out of the attic from beneficial airflow. Replacement air then enters through the soffit vents, runs over the underside of the roof and exits at the ridge cap through ridge roof or gable vents. Even without wind, the natural convection action of rising warm air maintains a continuous airflow along the underside of the roof.


Ultimately, proper ventilation-along with attic insulation- helps maintain a comfortable temperature inside a home, increase energy efficiency, prevent moisture damage and contribute to the longevity of a roof. Ventilation is an important component of any Top of the Roof System®. Owens Corning ventilation products will help prevent damage and premature aging caused by moisture in the winter and excess heat in the summer. Call us today if we may answer more of your questions on how to improve your roof.

Roof Ventilation Benefits