Profile: Gypsum By McCarthy, Inc. is a supplier of drywall, plaster and related supplies. We carry a complete line of acoustical ceilings, gypsum wallboard, metal studs, insulation and plaster products. Our gypsum wallboard products include regular gypsum board, gypsum sheathing, ceiling board, Hi-Abuse, Hi-Flex, Hi-Strength, fire-rated wallboard, moisture-resistant wallboard, shaftwall liner panels, fiberglass-covered exterior drywall, and concrete backer boards. We carry various tools including drywall finishing tools, Dura-stilts, aluminum benches, ready mix joint compound, and power sanders/vacuums.