Roof Attic Vents Details

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.

Roof attic vents details.

These are static vents without any moving parts and are installed over a hole that has been cut into the roof. 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. 1 square foot of net free vent area nfva per 150 feet of attic floor. The irc adds that the nfva ratio can also be reduced to 1 300 if 50 to 80 of the required.

Drip edge vents are a two in one installation that promote water shedding at the eaves and rakes of a roof while also allowing for ventilation into the attic. The keepa attic vent is built solely for flat roof ventilation a roof pitch that is 2 12 or less. A drip edge vent is made of a corrosive resistant material that sticks out about three inches back from the roof edge and then bends downward over them. Attic vents relieve humidity during the winter and heat during the summer to help extend roof membrane life.

The keepa attic vent is typically used for ventilating attics and or plenums as a roof exhaust vent or as an air intake roof vent the keepa attic vent comes with a standard flange that. 12 different types of roof vents.