Best Attic Rafter Vents

The code minimum for attic ventilation in the 2012 irc section r806 roof ventilation 1 is as follows.

Best attic rafter vents.

Rafter vents come in 4 foot lengths and 14 1 2 and 22 1 2 inch widths for different rafter spacings. To install the rafter vents staple them directly to the roof decking. The airflow from the soffits to the ridge vent keeps the roof cool and prevents ice dams and the material will block that flow. Benefit of vents my project has 6 of slope insulated from the top plate to the collar ties where the insulation continues on the flat.

Attic insulation rafter baffle proper vents 70 pieces model 70rm view the owens corning attic insulation 179 00 179 00. Raft r mate attic rafter vents create a space between each rafter for air to flow freely up the rafters and into the attic. Owens corning raft r mate attic rafter vents. Assist in the constant flow of fresh air from soffit vent to the ridge by preventing blockage of the airway at the soffit.

It can be cut to fit most joist spaces and is an affordable way to meet energy code requirements for air flow. The saying more is less applies to exhaust vents for an attic. Owens corning raft r mate 22 1 2 in. Of attic floor space.

Hot air exhaust vents located at the peak of the roof allow hot air to escape. For the same reason insulation shouldn t touch the roof s underside. Rafter vents ensure the soffit vents are clear and there is a channel for outside air to move into the attic at the soffits and out through the gable or ridge vent. Rafter vents should be placed in your attic ceiling in between the rafters at the point where your attic ceiling meets your attic floor.

Covering up the soffit vents with loose fill or batts which can happen if you stuff insulation along the eaves is a huge no no. Of net free area for every 150 sq. This means for every 150 square feet of attic floor space there should be 1 square foot of net free area. Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic.

Set your store to see local availability add to cart. For improved air circulation in the attic install the durovent 22 in. Use it between rafters to create an air channel through insulation to help keep air flowing freely in your attic. Mixing or combining two or more different types of exhaust vents ridge vents wind turbines roof louvers gable louvers roof mount power fans and gable mount power fans on the same roof above a common attic can actually short circuit the attic ventilation system.

I installed site built rafter vents 2 rather than filling the entire cavity because i can inspect the vented space for leaks from the deck installed on the collar ties.