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.