What are flashing used for in construction?

Flashing serves a vital function in construction by directing water away from critical areas of a building. It is typically made from materials like metal, plastic, or rubber and is installed in joints, seams, and transitions where different building components meet. These areas are often vulnerable to water intrusion, which can lead to significant issues such as mold growth, wood rot, and structural damage over time.

By creating a barrier that channels water away from these vulnerable points, flashing helps to maintain the integrity of the building’s envelope. This intervention is essential for ensuring that water does not seep into places where it could cause harm, thereby protecting the overall structural health of the building.

The other options, while relevant to construction practices, do not accurately define the primary purpose of flashing. Keeping this focus on the role of flashing highlights its importance in preventing moisture issues within a building.