1.1 This specification covers the requirements for the application of full thickness portland cement-based plaster for exterior (stucco) and interior work. 1.2 This specification sets forth tables for proportioning of various plaster mixes and p This specification covers the standard requirements for the application of full thickness Portland cement-based plaster for exterior (stucco) and interior work. It also sets forth tables for proportioning of various plaster mixes and plaster thickness.