Spacing Of Attic 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.

Spacing of attic vents.

Whole house fans powered attic fans. There are also box or dome shaped vents that go through the roof itself. But before you cut any holes plan the locations of the attic vents. Multiply the length of the attic times the width in feet to find the attic area then divide by 150 to find the total square feet of vent space needed.

Soffit vents are commonly made of aluminum or. 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. Length x width of attic in feet 150 total sq. Ft divided by 150 equals 10 sq.

To install the rafter vents staple them directly to the roof decking. Space the vents at the bottom and top of the attic equally according to house size. Of total vent space needed. Calculate the total vent area needed.

For the previous example you would need 20 soffit vents. Rafter vents come in 4 foot lengths and 14 1 2 and 22 1 2 inch widths for different rafter spacings. You need to have an equal number of vents located at the bottom of the attic or under the roof easement as you have at the top of the attic near a gable or ridge. Soffit vents or under eave vents are installed on the underside of the roof that hangs over the siding the eaves.

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. Soffit vents are one of the most popular intake vent styles. 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. It comes on an easy to install flexible mesh roll and is hand nailable with no complicated fitting wrapping nail gun adapters.

Fans and vents may be installed on the roof system that will draw the air out of the attic space and exhaust it to the exterior. These fans may be controlled by a switch or a thermostat which detects heat build up in the attic space and automatically exhausts the attic space. Photos 1 6 show how it s done. A 50 x 30 attic would have a total area of 1 500 sq.