TL;DR
An open valley is a roof valley finished with exposed metal — commonly 24-inch-wide W-profile steel, aluminum, or copper — with the shingles held back along chalk lines on either side so water runs on the metal itself. It sheds debris and heavy runoff better than closed-cut valleys, lasts longer in snow and leaf-prone settings, and makes future shingle replacement cleaner.
What it means
An open valley is a roof valley finished with exposed metal — commonly 24-inch-wide W-profile steel, aluminum, or copper — with the shingles held back along chalk lines on either side so water runs on the metal itself. It sheds debris and heavy runoff better than closed-cut valleys, lasts longer in snow and leaf-prone settings, and makes future shingle replacement cleaner. The lining must be lapped, cleated, and left unnailed through its center to allow movement.
Where it sits in the glossary
Open valley is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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