What type of roofs commonly use closed and closed-cut valleys?

Closed and closed-cut valleys are primarily associated with asphalt shingle roofs. This method is commonly used due to the easy applicability and effectiveness in managing water runoff, which is crucial for maintaining the integrity of the roof. In a closed valley, the shingles are laid in a manner that allows them to overlap and direct water into the valley system, preventing leaks. Closed-cut valleys involve cutting the shingles at an angle, allowing for a neat aesthetic while still facilitating water drainage.

The choice of using closed or closed-cut valleys in asphalt roofing is particularly suitable because asphalt shingles can be easily shaped and trimmed, providing flexibility in design and installation. Additionally, these valleys are designed to prevent debris accumulation, which is essential for the longevity of a roof and to minimize maintenance needs.

Other types of roofs, such as metal, tile, or wood shake roofs, generally utilize different techniques for managing water runoff, and may not incorporate closed or closed-cut valleys in the same way as asphalt shingle roofs. Metal roofs often employ an open valley system due to their smooth surface and ability to direct water; tile roofs might implement a different installation methodology; and wood shakes typically focus on their own unique overlapping style that doesn’t involve the same valley systems.