How does a high profile ridge cap compare with standard ridge cap in performance?
Wind
Ridges and hips take the highest wind pressures on a roof. Manufacturer hip and ridge products carry their own wind ratings and nailing instructions. A heavier high profile cap is not automatically more wind resistant; correct nail placement and sealing matter more.
Ridge vent compatibility
Both types can cover a ridge vent, but the vent and cap must work together. Taller caps can need longer nails to reach through the cap, the vent and into the deck. Check the vent maker's instructions for approved caps and fasteners.
Nails
- Each piece is nailed in the area that the next piece covers, a set distance from the edges.
- Nails must be long enough to penetrate the deck or the vent's nailing surface properly.
- Exposed nails at the last piece should be sealed.
Cold weather
Ridge caps bend over the ridge. In cold weather, standard caps cut from laminated shingles can crack, which is one reason manufacturers make dedicated hip and ridge products. Pre-bent or flexible caps handle cool days better.
Warranty
Enhanced manufacturer warranties typically require the manufacturer's own hip and ridge accessory. Using a generic cap or cutting architectural shingles for the ridge can cost you that coverage.
See ridge vent vs box vents and roof ventilation basics for how the ridge fits the airflow plan.