Grout is a mixture of cement, water and various sized aggregates. It is applied between the tiles. Grout is a porous material which allows dirt and other microscopic organisms to become embedded deep below the surface where mopping simply cannot reach. This dirt and microscopic organisms continually build up over years lodging themselves in the pores leaving the grout looking dirty and unhealthy. It is these embedded particles that you cannot remove with typical cleaning remedies. Apex uses industrial strength, 220-degree, high pressure, full extraction, truck-mounted steam to remove even the deepest embedded particles. Our Phoenix tile cleaning experts go way beyond mopping for that deep down cleaning that brings your tile and grout back to beautiful.