4/25/25 Applied trenchless spincast mortar to all underground ductwork and furnace box. Repaired furnace box and all register vents with hydraulic cement. 4/28/25 Applied first application of duct armor to all underground ductwork and furnace box 5-5-25 Applied second application of duct armor to all underground duct work. Sealed 6 sections of air duct pipe where we cut access with hydraulic cement. Rebuilt two registers with hydraulic cement. Backfilled all 8 holes with 3/4” stone and recemented all 8 holes.