What role does flashing play in masonry construction?

Flashing is a vital component in masonry construction as it is primarily designed to prevent water infiltration. It is typically made from materials like metal, plastic, or rubber and is strategically installed at joints, transitions, and potential leak points within the masonry to redirect water away from the structure. By doing so, flashing helps protect the integrity of the masonry and the building itself, which could suffer significant damage from water intrusion if not properly managed.

The other options do not accurately capture the purpose of flashing. For instance, while it may contribute slightly to the overall weight of the structure, that is not its primary function. Similarly, flashing does not serve an aesthetic purpose, nor does it provide support for wall ties, which are used for stabilizing the masonry. The essential role of flashing in preventing moisture penetration underscores its importance in masonry construction.