What is the main purpose of water resistant membranes in building construction?

The primary role of water-resistant membranes in building construction is to prevent moisture accumulation within the structure. These membranes act as a barrier that stops water from penetrating into walls, roofs, or foundations, which is critical in protecting the building from water-related issues such as mold growth, wood rot, and structural damage. By controlling moisture and preventing it from reaching sensitive materials, these membranes help ensure the longevity and integrity of the building over time.

While structural support, enhancing aesthetic appearance, and improving energy efficiency are important aspects of construction, they are not the primary function of water-resistant membranes. Their main focus remains on moisture control, which directly contributes to the overall health of the building environment.