Profile: CDM Ductwork specializes in the design, manufacture and erection of ductwork systems. We are certified with ISO 9001 certification. We manufacture insulated ductwork access doors. We also manufacture and install fire-rated ductwork using the Firemac system. The ductwork is manufactured as standard, then a fire-proof material is glued by us onto the duct using a strong adhesive. The frames are riveted on using steel rivets as the specification dictates. Our engineering works include plasma cutting, welding and fabrication works. We fabricate many things ranging from welded angle framework, racking to kennel doors.