A closed valley is a roof valley where shingles cover the valley instead of leaving a strip of metal visible.
Why It Matters
Closed valleys can look cleaner from the ground, but they still need proper underlayment and shingle detailing because valleys carry heavy water flow.
Common Problems
Common problems include incorrect nail placement, cut shingles placed too close to the water path, inadequate underlayment, and debris collecting in the valley.
Building Codes & Industry Standards
Closed valleys should be installed according to the shingle manufacturer’s valley instructions and applicable roof underlayment requirements.
Exterior Echelon Notes
Exterior Echelon considers roof slope, runoff volume, manufacturer requirements, and appearance when reviewing valley details.
