Residential Attic Ventilation

A ridge vent is a ventilation strip that is placed along the ridgeline of the home.

Residential attic ventilation.

The recommended ventilation ratio to provide for vented attic assemblies when an air barrier is present is the 1 300 ratio as specified by most building codes. How attic ventilation works. See the benefits of attic ventilation a new roof is more than just shingles. 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.

The following is a list of options for installing ventilation into a residential attic space. 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. Calculate or enter the square footage of the attic or area to be vented. Cobra exhaust vent 10 5 in.

Proper attic ventilation can be an impor tant performance consideration when design ing and installing steep slope roof systems. Of vent for every 300 sq. The roofing industry also has practical guide lines for attic ventilation. This is based principally on good historical experience and simple psychrometric analysis handegord giroux 1984.

Square gable vent functions as a decorative accent to your home while providing maximum attic ventilation. Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge. It comes on an easy to install flexible mesh. Prior to installing the ridge vent a 1 inch wide strip of roof decking is cut out along both sides of the ridgeline to allow for air movement through the vent.

This ply gem 14 in. Its two piece design is fully compatible with all siding profiles ply gem gable vents are designed to withstand the toughest weather and retain their beauty year after year. Typically building codes include minimum requirements applicable to attic ventilation. 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.

Code requirements the international building code. Building codes vary though so do check with your. The general rule of thumb suggests installing at least 1 sq.