Valley

Definition

A valley is the trough or internal angle formed by the intersection of two roof slopes, directing water to flow away from the roof.

Purpose

The valley is a crucial element in roof design for managing water runoff. It channels rainwater and snowmelt to the gutters, preventing water accumulation and leaks in the roof structure.

Examples of Use

• Gabled Roofs: Valleys formed where two gabled roof sections intersect, directing water away from the roof.
• Complex Roof Systems: Multiple valleys in large or intricate roof designs to efficiently manage water flow.
• Dormers: Valleys created where dormer roofs meet the main roof, ensuring proper drainage.

Related Terms

• Ridge: The horizontal line where two roof slopes meet at the top.
• Hip: The external angle formed where two roof slopes meet.
• Eave: The edge of the roof that overhangs the face of a wall.

Notes

Proper construction and waterproofing of valleys are essential to prevent leaks and ensure effective water drainage. Valley flashing and valley rafters play key roles in this process.