A waterproofing membrane is a barrier designed to prevent water from penetrating surfaces, protecting structures from moisture damage. These membranes are commonly used in construction, particularly in areas like roofs, basements, and foundations, where water exposure is a concern. They can be made from various materials, including rubber, plastic, or bitumen, and are applied in sheets or liquid form. The primary function of a waterproofing membrane is to create a continuous layer that stops water infiltration. This helps to maintain the integrity of buildings and prevents issues such as mold growth, structural damage, and deterioration of materials. Proper installation is crucial for effective performance.