Attic Ventilation Installation

Most building codes require a ratio of 1 150 ventilation space to attic floor space.

Attic ventilation installation. You can also contact your local municipality to check on building code in your area. You also want a fan that s appropriate for the square footage of your attic space by checking the manufacturer s specifications. To save time use an existing roof or gable vent to install your new attic fan. Start by using a chalk reel to snap two parallel lines down the center of the soffit.

Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic. Hole through the soffit right between the lines and measure the. This way you don t have to cut a brand new hole but simply make the hole for the vent larger so it can accommodate the fan. Hot air exhaust vents located at the peak of the roof allow hot air to escape.

Next bore a 3 4 or 1 in dia. A licensed electrician can ensure that all aspects of your project will be completed correctly. 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. 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.

That said air resistance and interference such as vent grates reduces the area of true ventilation. Connect the two cuts. In other words the entire vent opening doesn t count as vented space. Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca.

Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Ventilation systems can be installed by handymen roofers and ventilation manufacturer installation professionals. Required materials for this roof vent installation project attic insulation baffles roof cement roof vents roofing nails sheet metal screws soffit vents. There are many factors that influence the overall cost of installing a home ventilation system and most are based on the system type.