Stucco is a cementitious mix applied in several layers to a wire-lath base over wood-frame construction or to a masonry surface such as brick, block, or structural tile. Like plaster, stucco is usually applied in three coats: a base coat approximately 3⁄8 in. thick, scored horizontally to help the next coat adhere; a brown coat about 3⁄8 in. thick; and a finish coat (called a dash coat by old-timers) 1⁄8 in. thick. For repair work and masonry-substrate work, two-coat stucco is common.