The customer’s air ducts are very rusted and deteriorated and dirt and debris are flowing out of the air vents. To alleviate this problem, we are going to apply our Trenchless cast mortar to all of the underground duct work to give it a strong concrete structure. We are then going to apply two applications of our rubberized duct lining material to completely seal the system. After this is done, dirt and debris will no longer enter the system.