The final step is to install the type ridge vent you have chosen for your roof system. Instructions for both aluminum and shingle over ridge vents are below.
Option 1 -- Installation of Shingle Over Ridge Vent
The first step in the installation of a shingle over ridge vent is to measure down the manufacturer’s recommended distance from the ridge line along one side of the ridge. Utilize your chalk line to strike a line along the ridge. Place your shingle over ridge vent along this line and nail the ridge vent according to the manufacturer recommendations. Then attach the other side of the shingle over ridge vent to the opposite side of the ridge to fully secure the vent.
After installing the shingle over ridge vent, the second step is to install asphalt shingle caps over the installed ridge vent material using the nails recommended by the manufacturer of the shingle over ridge vent that you installed.
Option 2 -- Installation of Aluminum Ridge Vent
The first step for installing the aluminum ridge vent is to measure down the manufacturer’s recommended distance from the ridge line of the roof system along the ridge of the roof. Utilize your chalk line to set a line along the ridge line. Position the aluminum ridge vent along the line. Utilize the pneumatic nailer to nail the flange of the ridge vent to the roof deck at intervals recommended by the product manufacturer. Then secure the other side of the aluminum ridge vent to the opposite site of the ridge line.
If you choose to install an aluminum ridge vent, be sure to incorporate the connectors and end caps for the product into your system to ensure that the joints and ends of the ridge vent remain watertight. In addition, these accessories will help to keep bugs and other pests out of your attic space.
This is only one part of properly ventilating your attic space and roof. Roof a ridge vent to work properly it relies on passive air flow which requires a secondary venting option such as installation of soffits, gable vents or other attic ventilation.