An aluminum ridge vent has a mushroom shaped profile combined with a wide flange on both sides that sits on top of the roof shingles.
Installing roof ridge vent existing roof.
This aluminum cap is the finished product and does not require additional asphalt shingle ridge caps.
The ridge of the roof is prepared similarly for both types of ridge vent.
Snap a chalk line on either side of the ridge that is about an inch from the peak and cut the shingles along both.
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.
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.
How to add a roof ridge vent to an existing roof 1.