How To Install Ridge Vent On Existing Roof

Several ridge vent installation tips are given in this video.

How to install ridge vent on existing roof.

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. Exact rates depend on the type size and number of units you choose to install. Add any connectors and end caps that came with your ridge vent system to ensure the vent is watertight. 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.

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. 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. Vents evenly spaced underneath the roof provide intake.

Position the aluminum ridge vent along the reference line. Roof vents come in a variety of styles and range from 10 to 500 each. 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. One of the fundamental steps is to nail one side of the ridge vent before nailing the other sid.

To calculate an example of exhaust and intake use 25 feet of roof ridge vent. How to add a roof ridge vent to an existing roof. Installing a roof vent costs between 300 and 650 on average including labor and materials.