What is the primary purpose of using moisture barriers in construction?

The primary purpose of using moisture barriers in construction is to prevent mold growth. Moisture barriers are critical in controlling the humidity levels within walls, floors, and other structural elements. By effectively blocking moisture from penetrating into these areas, moisture barriers help to create a dry environment which is essential for preventing the development of mold and mildew. This is especially important in areas prone to high humidity or where water exposure may occur, as mold can compromise the integrity of the building and pose health risks to occupants.

While reducing thermal loss and enhancing aesthetic appeal can be associated with various construction practices, they are not the primary functions of moisture barriers. Moisture barriers are specifically designed to tackle humidity issues first and foremost. Therefore, preventing mold growth is the key focus, making it the correct choice.