What material is commonly installed behind brickwork to manage water flow?

The correct answer, copper flashing, is commonly used behind brickwork to effectively manage water flow and prevent moisture intrusion. Flashing is essential in construction as it directs water away from critical areas to avoid water penetration and damage. Copper is favored for its durability and resistance to corrosion, allowing it to maintain its effectiveness over time without degrading even in harsh weather conditions.

In contrast, plastic sheeting, while sometimes used as a moisture barrier, is not typically used specifically behind brickwork for water management. Aluminum foil is not appropriate for this application because it lacks the structural integrity and weather resistance required for flashing. Wood lath, on the other hand, serves a different purpose in construction, primarily as a base for plaster; it does not function effectively in managing water flow behind brick installations. Thus, copper flashing provides the ideal solution for ensuring proper drainage and protecting the integrity of brick masonry.