And if you’ve visited your Senator at the Dirksen Office Building, you’ve seen our plaster work. Since 1962, C. J. Coakley Co., Inc. has been installing drywall, plaster, and acoustical ceilings in commercial spaces in the Washington D.C. metropolitan area. Today, the company continues to focus on the same foundation that Cornelius and Ellen Coakley began: quality work at competitive prices.