How often should you replace a roof ridge cap?
Short answer. A ridge cap normally lasts as long as the rest of the roof and is replaced with it, so it does not need its own schedule. Replace individual caps sooner if they crack, lift, lose granules or blow off, which happens more often on ridges because they take the most wind and sun.
Why ridges fail first
- Bending stress. Each cap is folded over the peak. Cut-up 3-tab shingles used as caps on older roofs crack along that fold as they age, especially when bent in cold weather.
- Wind uplift. The ridge is the highest point of the roof and catches gusts from every direction.
- Ridge vent fastening. Caps over a ridge vent need longer nails to reach the deck. Short nails pull out.
- Sun. Caps get full sun on both sides all day.
Signs your caps need attention
- Visible cracks across the top of the fold.
- Caps missing after a storm, often found in the yard.
- Exposed nail heads or lifted edges.
- Granule loss concentrated along the peak.
How a repair is done
The damaged caps are removed, new caps are set in the same direction as the originals, starting from the end away from the prevailing wind, and each is nailed where the next cap covers the nails. The final cap is face-nailed and the nail heads sealed. Matching color on an older roof can be tricky, but the ridge is less noticeable than a slope.
Wind damage to caps is common in Georgia thunderstorms and is often part of a storm claim, as covered in wind damage to roofs in Georgia. For how caps work with ridge vents, see ridge vent vs box vents.