Slab drains are most common on concrete roofs, but are also found in patios, parking garages, decks, penthouses, and much more. The drains are usually a gutter-like channel leading to a tube that carries the water away from the building back to the ground. Concrete drainage issues can lead to a variety of problems. Including rotting and molding your home, water leaking through the ceiling, and mosquitos using the pooling water as breeding grounds. CL Wizard can solve all of these problems for your concrete structure in less than a day.