How To Install Ridge Vent On Existing Roof

Roof vents come in a variety of styles and range from 10 to 500 each.

How to install ridge vent on existing roof.

Installing a roof vent costs between 300 and 650 on average including labor and materials. How to add a roof ridge vent to an existing roof. Vents evenly spaced underneath the roof provide intake. Add any connectors and end caps that came with your ridge vent system to ensure the vent is watertight.

Fasten the vent to the roof decking and rafters or trusses by nailing through the flange on both sides of the vent using the nails and nail spacing recommended by the manufacturer. The amount of venting your attic needs is based on its floor space and to ensure proper air circulation the venting should be equally divided. Mark a pencil line on the ridges of the installed metal roofing panels using the edge of the ridge cap as a guide. Ridge vents cost 2 to 3 per linear foot.

Using the example above three round vents would be needed 432 144 3 vents or nine square vents 432 50 8 64 or 9 vents. Then they lap the peel and stick existing felt and new housewrap over the step and kick out flashings so that any water hitting the wall is directed onto the roof instead of behind the flashing. One of the fundamental steps is to nail one side of the ridge vent before nailing the other sid. Position a section of metal ridge cap over the peak of the metal roof with the end of the ridge cap flush with one end of the roof peak.

To calculate an example of exhaust and intake use 25 feet of roof ridge vent. Several ridge vent installation tips are given in this video. Position the aluminum ridge vent along the reference line.