How much does a ridge vent cost to install?
Short answer. Installing a ridge vent on a roof that never had one usually costs more than replacing an existing vent, because the job includes cutting a new slot, installing the vent and new cap shingles, and often closing and patching old box vents. As a stand-alone project on a typical home, quotes commonly range from several hundred dollars to over $1,000; during a roof replacement, it is a modest add-on.
What a first time install includes
- Assessment: confirming soffit intake, ridge length, and framing type, which sets the slot width.
- Slot cutting: sawing through the decking along the peak, stopping short of the ends and of any chimney or wall.
- Vent and caps: installing the vent and new hip and ridge cap shingles with longer nails.
- Closing old exhaust: removing box vents or turbines, decking over the holes, and weaving in shingles. Each patch adds labor and needs shingles that blend in.
- Gable vents: blocking them from inside if the attic has soffit intake.
- Intake upgrades: adding soffit vents if the eaves are solid, which can be a separate trade.
Why the range is wide
A 25 foot ridge on a single story ranch is very different from a 60 foot ridge two stories up on a steep roof. Patching five or six old vents can add as much as the ridge vent itself. Matching weathered shingles at patches is often imperfect, which is one reason many homeowners wait for a full replacement.
Is it worth doing now?
If your roof is in good shape with years left and the attic shows moisture or heat problems, a retrofit can make sense. If the roof is within a few years of replacement, fold the ridge vent into that job, where the cost is mostly the vent material and slot cutting. See roof replacement cost in Georgia and signs you need a new roof.