How To Install Ridge Vent On Existing Roof

Exact rates depend on the type size and number of units you choose to install.

How to install ridge vent on existing roof.

Position the aluminum ridge vent along the reference line. 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. Mark a pencil line on the ridges of the installed metal roofing panels using the edge of the ridge cap as a guide.

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. Below we ve compiled some helpful tips on how to install a ridge vent for metal roofing. 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.

To calculate an example of exhaust and intake use 25 feet of roof ridge vent. One of the fundamental steps is to nail one side of the ridge vent before nailing the other sid. 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. 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.

Several ridge vent installation tips are given in this video. 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. Installing a roof vent costs between 300 and 650 on average including labor and materials.