Our national experience has developed methods which produce the best stucco structure most economically. Our recommendations include a sound substrate, metal reinforcement where necessary, the correct preparation of masonry surfaces, the proper materials for the base coat, and the California Stucco finish coat for a strong and durable finish. All these have a direct bearing on a satisfactory stucco job.
Install Portland scratch and brown coats or E-Z Wall Base Coats to a minimum of 3/8" then California Stucco finish coat as in the case of frame construction. Masonry surfaces not sufficiently rough enough to provide a good mechanical key (i.e. monolithic concrete) and where metal lath is not required, a dash coat should be applied providing the surface is free from oil and other elements that would inhibit an adequate bond. California Stucco finish can then be applied. Exterior acrylic bonding agents may be used in the preparation of the masonry substrate but only under direct supervision of a journeyman plasterer.
Old block, brick or Painted Stucco
Install metal reinforcing using self-furring galvanized mesh, nailing into horizontal joints. Apply Portland scratch and brown coats, or E-Z Wall and California Stucco finish coat as in the case of frame construction. In the case of painted masonry where powerwash or sandblasting does not reveal a good mechanical key, this procedure is required. Exterior acrylic bonding agents may be used in the preparation of the masonry substrate, but only under direct supervision of a journeyman plasterer.