Installing Attic Intake Vents

Drive nails up through the sheathing and shingles to mark roof air vent locations.

Installing attic intake vents.

To save time use an existing roof or gable vent to install your new attic fan. 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. Set your circular saw at 1 8 inch 0 4 cm greater than the thickness of your roof s soffit when installing an intake vent. As a result the attic ventilation will not be effective in cooling the area.

This creates a natural air flow by drawing in the air from outside pushing it up and out through the vent at the top of the house. 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. Check around the edges of your attic for any wiring. That path is supposed to be from low in the attic intake vents to the highest possible exit point in the attic exhaust vents.

Then cut out your desired location and screw the vent directly into the soffit. 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. Center nails between rafters 18 in. Make sure you play close attention to the insulation which should leave a gap between itself and the vent.

How to install a roof vent method 1 of 3. When you install 2 exhaust vents in the attic they draw air from each other as opposed to drawing air from the intake vents. From the roof s peak. Photos 1 6 show how it s done.

This is called passive ventilation. If two different types of exhaust vents are combined for example a ridge vent and a gable louver the primary path of air becomes the distance between the two types of exhaust vents. An attic s intake vents are most commonly installed directly in the soffit either as individual vents spaced every few feet or as one continuous perforated soffit running the entire length of the. At the same time you need to create a balance between the exhaust vents and the intake vents.

Installing soffit intake vents. Go into your attic. The most common way to add ventilation to an attic is by installing air intakes in the soffits and putting an outlet at the gable of the house. Adding static exhaust vents.

You also want a fan that s appropriate for the square footage of your attic space by checking the manufacturer s specifications. They are easy to install under the roof s overhang which is known as the soffit are generally hidden from sight and provide excellent protection from weather outdoor debris and pests while still allowing air to flow into the attic. Soffit vents are one of the most popular intake vent styles.