Roof valleys — the V-shaped intersections where two roof planes meet — are one of the highest-risk areas on any residential roof. They handle maximum water concentration on your entire roof system.
Why Valleys Leak
Volume concentration: Every drop that falls on surrounding roof planes ultimately drains through the valley. In an Atlanta thunderstorm, valleys handle enormous water flow.
Debris accumulation: Leaves, pine needles, and organic material collect in valleys. This debris holds moisture against roofing material and accelerates deterioration.
Flashing failure: Valley flashing degrades from constant water flow, UV exposure, and thermal cycling. Aluminum valley flashing has a lifespan of 15-25 years under Georgia conditions.
Repair Options and Costs
Re-caulk open valley seams: $150-$300. Temporary fix — not a permanent solution.
Replace valley flashing section: $300-$700 depending on length and accessibility. The right repair for a failed metal valley.
Full valley rebuild (shingles + flashing): $500-$1,200. Required when underlying shingles are also damaged.
Prevention
- Keep valleys clear of debris
- Annual inspection of valley condition, especially on older roofs
- After hail events, have valleys specifically checked for metal denting and adjacent granule loss
Seeing staining or dripping tracing back to a valley? Book your repair assessment →