Televised ducts under slab floor to inspect for mortar of tees.
Televised ducts under slab floor. Ducts are cardboard ducts with metal fitting and connections. There are spots where cardboard is collapsed and we were unable to get the camera past. Suggest spin cast mortaring then spray lining ducts with Duct Armor duct lining material, but that would require several locations where we would need to excavate and expose the pipe because of collapses and the size of the registers.