How To Install Ridge Vent On Existing Roof

Mark a pencil line on the ridges of the installed metal roofing panels using the edge of the ridge cap as a guide.

How to install ridge vent on existing roof.

Exact rates depend on the type size and number of units you choose to install. Installing a roof vent costs between 300 and 650 on average including labor and materials. Vents evenly spaced underneath the roof provide intake. Roof vents come in a variety of styles and range from 10 to 500 each.

How to add a roof ridge vent to an existing roof. To calculate an example of exhaust and intake use 25 feet of roof ridge vent. Below we ve compiled some helpful tips on how to install a ridge vent for metal roofing. Ridge vents cost 2 to 3 per linear foot.

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. Before the ridge vent installation begins the crew installs pieces of peel and stick membrane to patch under the existing felt paper on the adjacent wall. 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. Position the aluminum ridge vent along the reference line.

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. Several ridge vent installation tips are given in this video. 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.