OVER 40 YEARS OF SERVICE  What started over 40 years ago with the idea that a full-service sheet metal contracting firm could deliver high quality and prompt service grew into one of the most respected industrial enterprises in the Washington, D.C. area.QUALITY  CMC Sheet Metal is a premier sheet metal fabrication facility located in Capitol Heights, Maryland providing the highest quality HVAC Construction Services to our clients and the industry. During that time we have preformed individual projects ranging well over thirteen million dollars.EXPERIENCE  We have the experience needed to produce top results, the proof to demonstrate our top quality and a complete client satisfaction in all of the work we do.