How to Install a Continuous Ridge Vent

Attic ventilation is the silent hero of a long-lasting home. Without it, your attic becomes a furnace in the summer and a sweatbox in the winter, leading to premature shingle curling and nasty mold growth on your roof decking. A continuous ridge vent is the most efficient way to balance this system, providing a natural convection pathway for air to move from the soffits up to the peak. Installing one isn't just about nailing plastic over a gap; it is about creating a precise, weather-tight passage. When done correctly, your attic stays dry and the temperature remains consistent, which keeps your cooling bills down and your roof structure sound. Precision here is non-negotiable, as any gap in the seal is an invitation for wind-driven rain or snow to ruin your drywall.

1. Mark the ridge cut line. Snap a chalk line on both sides of the ridge cap, exactly 1 inch away from the center of the peak. Ensure your measurements are symmetrical so the gap is centered over the rafters.
2. Cut the roofing gap. Set your circular saw depth to cut through the roof sheathing only, avoiding the rafters below. Carefully follow your chalk lines to remove the strip of wood from both sides of the ridge.
3. Secure the vent base. Center the ridge vent over the opening and secure it using the manufacturer-provided roofing nails. Ensure the flange sits flat against the shingles on both sides.
4. Seal end cap gaps. Apply a generous bead of high-grade exterior roofing sealant to the end caps of the vent. Secure the caps firmly to ensure no wind-blown rain can enter the attic.
5. Cap with matching shingles. Cover the plastic ridge vent with matching shingles, following the nail pattern specified by the vent manufacturer. Use longer roofing nails to account for the thickness of the vent material.
6. Inspect for gaps and defects. Walk the ridge to ensure no nails are exposed or loose. Check that all shingle edges are tight against the vent surface.