Few things are more misunderstood about the home than attic ventilation. In essence, all ventilation is about circulating air, to reduce moisture levels and to remove super heated air. The American Institute of Architects estimates that 90 percent of homes in the U.S. have unacceptably high levels of moisture. Understanding whether your home could benefit from some form of attic ventilation might just be, if not a life-saver, a roof-saver.
Attic ventilation is an important tool in the creation of optimal environmental conditions in any residence or structure. Properly venting the attic space helps ensure a healthier environment as well as conserve energy. Attic ventilation may also play an important role in prolonging the life of your roof.
Ventilation requires the free flow of air, which may be achieved through the use of different methods and products. A proper roof ventilation system encourages superior air movement by exhausting air from the upper vents (exhaust) causing a natural vacuum effect that draws air in through the lower vents (intake).
Having roof vents doesn’t necessarily have to take away from the looks of your roof. Products such as O’Hagin Roof Vents (www.ohagin.com) offer a highly functional product line that makes no or very little noticeable change to the appearance of your roof.
When it comes time to determine the number of roof vents needed for your house, there is an online calculator available at http://www.ohagin.com/calculator.asp . The formula used to determine the number of vents needed to comply with building code, is referred to as the 1/150 method of calculation. These methods dictate that one (1) square foot of ventilation is provided for every 150 square feet of attic floor space.