In construction, a building or structure is waterproofed with the use of membranes and coatings to protect contents and structural integrity. The waterproofing of the in construction specifications is listed under 07 – Thermal and Moisture Protection within 2004, by the , and includes roofing and waterproofing materials.
In building waterproofing is a fundamental aspect of creating a , which is a controlled environment. The roof covering materials, foundations, and all of the various penetrations through these surfaces must be water-resistant and sometimes waterproof. Roofing materials are generally designed to be water-resistant and shed water from a sloping roof, but in some conditions, such as and on the roofing must be waterproof. Many types of waterproof membrane systems are available, including to make a built-up roof, other ethylene propylene diene monomer and more.
Walls are not subjected to standing water, and the water-resistant membranes used as are designed to be porous enough to let moisture escape. Walls also have is another aspect of waterproofing. Masonry walls are built with a damp-proof course to prevent and the concrete in foundations needs to be damp-proofed or waterproofed with a liquid coating, membrane (even under the concrete slab floor where sheeting is commonly used), or an additive to the concrete.