Sub Flooring Repair Cost. The cost of repairing or replacing floorboards. Most smaller jobs, such as rotted floor joists, buckling floors or a sagging floor, can cost about $400 to $1,000 on average.
Over time, a sink or refrigerator water leak can damage and even destroy flooring materials and the subfloor below it. After you allow the floor to dry out, seal it with a subfloor sealer. Replacing damaged flooring and integrating it with existing flooring costs more per square foot than installing new flooring in an entire room.
Both had been install during my 2015 summer renovations.
That cost breaks down between labor and materials: The cost of repairing or replacing floorboards. Set project zip code enter the zip code for the location where labor is hired and materials purchased. On average, be prepared to pay around $10 to $35 per square foot if you were to hire a professional contractor.