Install Ridge Vent Existing Roof

Installing a ridge vent to ventilate the attic.

Install ridge vent 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. Mark a pencil line on the ridges of the installed metal roofing panels using the edge of the ridge cap as a guide. Using a circular saw with a carbide tip blade one of the roofers plunges the saw into the ridge at the ends and then follows the chalk line. The total area of the vents in an attic normally equals 1 150 of the floor area.

Add any connectors and end caps that came with your ridge vent system to ensure the vent is watertight. Cutting through the roof. Remove the ridge cap from the roof peak. Position the aluminum ridge vent along the reference line.

Below we ve compiled some helpful tips on how to install a ridge vent for metal roofing. Snap a chalk line on either side of the ridge that is about an inch from the peak and cut the shingles along both. Time was about 1 hour and 15 minutes with 2 men. Installed at the peak of a sloped roof the ridge vent allows damp warm air to escape from the attic.

A properly installed ridge vent increases energy efficiency and prolongs the life of your roof. Installing the vent in an existing roof entails tearing off the ridge shingles and cutting away the upper 2 or 3 inches of roof sheathing on each side of the ridge with a circular saw. How to install a ridge vent in an old house calculating venting area. Tools required circular saw dril.

To begin the ridge vent installation they measure down 3 inches from the top of the ridge and snap a line to cut the opening for the ridge vent. 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. Cost was less than 100. A ridge vent is an important part of a home s roofing system.

Remove all the shingle caps from the roof ridge from one side of the roof to the other by prying them up with a pry.