Attic Ventilation Installation

Hole through the soffit right between the lines and measure the.

Attic ventilation installation.

Start by using a chalk reel to snap two parallel lines down the center of the soffit. In other words the entire vent opening doesn t count as vented space. Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic. Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca.

Hot air exhaust vents located at the peak of the roof allow hot air to escape. There are many factors that influence the overall cost of installing a home ventilation system and most are based on the system type. You also want a fan that s appropriate for the square footage of your attic space by checking the manufacturer s specifications. Connect the two cuts.

Generally speaking you need a ratio of 1 300 where for every 300 square feet of ceiling space you need 1 square foot of attic ventilation. A licensed electrician can ensure that all aspects of your project will be completed correctly. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Required materials for this roof vent installation project attic insulation baffles roof cement roof vents roofing nails sheet metal screws soffit vents.

That said air resistance and interference such as vent grates reduces the area of true ventilation. Next bore a 3 4 or 1 in dia. To save time use an existing roof or gable vent to install your new attic fan. How to install soffit vents make two parallel lines.

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. Most building codes require a ratio of 1 150 ventilation space to attic floor space. 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. You can also contact your local municipality to check on building code in your area.