Spacing For Roof Vents

How to install roof vents.

Spacing for roof vents.

Roof vents will provide about half of the vent area and soffit vents the other half. 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. 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 or under eave vents are installed on the underside of the roof that hangs over the siding the eaves.

It is important that air movement occurs and is not impeded by any framing members of the. Next divide the square footage of vent space required by the square footage of soffit vent you have selected. Prior to installing the ridge vent a 1 inch wide strip of roof decking is cut out along both sides of the ridgeline to allow for air movement through the vent. From the roof s peak.

Gable vents as the name suggests attach to the gables rather than the roof itself and go through the siding. A ridge vent is a ventilation strip that is placed along the ridgeline of the home. Drive nails up through the sheathing and shingles to mark roof air vent locations. 27 lineal feet required.

Center nails between rafters 18 in. Choose one of the following products to meet the recommended exhaust nfva of 528 square inches. Continuous or individual soffits. For the previous example you would need 20 soffit vents.

They come in a number of shapes such as squares rectangles and triangles. Ventsure 4 foot strip heat moisture ridge vent.