What is an opening for drainage in a wall, curb, or parapet called?

The term for an opening designed for drainage in a wall, curb, or parapet is called a scupper. Scuppers are critical components of roofing systems as they allow water to drain off the roof effectively, preventing water accumulation that can lead to leaks or damage. They are typically designed to facilitate the flow of water and are placed strategically to manage runoff from the roofing surface.

This drainage feature is especially important in areas where water pooling can occur, as it helps ensure the roof remains functional and reduces the risk of structural issues over time. Additionally, scuppers can support the overall drainage system of a building, ensuring that excess water is redirected away from the structure.

While other terms like scuttle, cricket, and flashing are related to roofing and drainage systems, they do not refer directly to the openings that facilitate drainage. Scuttles are hatches for accessing roofs, crickets are structures used to direct water flow, and flashing refers to materials used to prevent water infiltration at joints and transitions.