Roofing Glossary

Woven Valley

A woven valley interlaces the shingles from both roof slopes across the valley — each course alternates which slope's shingle lies on top, weaving across the channel like fabric. It is the most traditional valley style and gives a fully shingled, crafted appearance.

Woven valleys shed water well when new, because there is no cut edge for water to catch. Their weakness is long-term: the interlaced shingles bridge the valley rather than conforming to it, and as they age and stiffen, the bridging shingles can lift, crack, or channel water sideways.

Most manufacturers and contractors have moved away from woven valleys toward closed-cut or open styles, which are more predictable over a roof's full life. Woven valleys remain common on older roofs and in regions with strong traditional building practices.

Why It Matters

If your older roof has woven valleys that are lifting or leaking, rebuilding them as closed-cut or open valleys during re-roofing is the modern, longer-lived solution.

Questions about your own roof? Request a free estimate or call Nucci Brothers Roofing at (301) 458-1003.