When patent plasters are used, if of wood lath, shall not be less than one-quarter inch key space. First coat shall be thoroughly scratched to make key to retain second coat, and shall be set before second coat is applied.
53 P.S. § 4177
When patent plasters are used, if of wood lath, shall not be less than one-quarter inch key space. First coat shall be thoroughly scratched to make key to retain second coat, and shall be set before second coat is applied.
53 P.S. § 4177