Residential Attic Ventilation

The general rule of thumb suggests installing at least 1 sq.

Residential 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. Proper attic ventilation can be an impor tant performance consideration when design ing and installing steep slope roof systems. The roofing industry also has practical guide lines for attic ventilation. 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.

How attic ventilation works. The following is a list of options for installing ventilation into a residential attic space. Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor 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.

Square gable vent functions as a decorative accent to your home while providing maximum attic ventilation. Calculate or enter the square footage of the attic or area to be vented. 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. Building codes vary though so do check with your.

Cobra exhaust vent 10 5 in. A ridge vent is a ventilation strip that is placed along the ridgeline of the home. 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. It comes on an easy to install flexible mesh.

Mesh roll ridge vent in black nail gun version when installed as part of a properly balanced when installed as part of a properly balanced attic ventilation system gaf cobra exhaust vent is a shingle over exhaust vent installed at the roof ridge that helps exhaust excess heat and moisture from your attic. 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. Code requirements the international building code.

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. This is based principally on good historical experience and simple psychrometric analysis handegord giroux 1984. Attic venting serves an important purpose and is key to a well performing roof system.