Waterproofing systems are methods and materials used to prevent water from penetrating structures, such as buildings and basements. These systems are essential for protecting against water damage, mold growth, and structural deterioration. Common waterproofing techniques include the application of membranes, coatings, and sealants that create a barrier against moisture. There are various types of waterproofing systems, including liquid-applied membranes, sheet membranes, and cementitious waterproofing. Each type has its own advantages and is chosen based on factors like the structure's location, the level of water exposure, and the specific needs of the project. Proper installation and maintenance are crucial for effectiveness.