Attic Ventilation System Standards

Anyone involved with residential roofing should become familiar with the purpose of attic ventilation and understand how to achieve an effective ventilation system while meeting building code requirements. Code requirements the international building code 2012 edition ibc 2012 requires enclosed attics and enclosed rafter spaces formed. These fans may be controlled by a switch or a thermostat which detects heat build up in the attic space and automatically exhausts the attic space.

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Attic venting serves an important purpose and is key to a well performing roof system.

Attic ventilation system standards.

Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator. See the benefits of attic ventilation a new roof is more than just shingles. Ing and installing steep slope roof systems. The roofing industry also has practical guide lines for attic ventilation.

Effective attic ventilation systems reduce damaging heat and moisture in your attic promote energy efficiency by helping to reduce the load on your air conditioner in the summer and also reduce the risk of ice dam formation on your roof. Owens corning recommends a balanced ventilation system based on the u s. Whole house fans powered attic fans. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.

Typically building codes include minimum requirements applicable to attic ventilation. Intake vents located at the lowest part of the roof under the eaves allow cool. Fans and vents may be installed on the roof system that will draw the air out of the attic space and exhaust it to the exterior.

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