How Do You Repair Water Damage On A Subfloor?
Water damage to the subfloor is an important problem that needs repair. The rotted subfloor will be weak and possibly dangerous. Modern subfloors are built using 3/4-inch plywood or OSB, and when they get wet and rot the layers separate, creating bumps in the floor. The damaged subfloor must be removed and replaced. Use plywood for repairs rather than OSB. It costs slightly more, but the additional strength of the plywood is important since the integrity of the subfloor will be compromised. Determine the region of subfloor to be replaced. Plan for a rectangular demolition section. Two sides of the rectangle must be parallel to the floor joists and be on top of the joists. Keep the demolition area square and use a framing square, tape measure and straight edge to mark out the demolition section. Set the circular saw to cut 3/4″ deep and plunge cut into the subfloor along the top of a joist, cutting along the line from start to finish. Repeat over the next joist, then cut across the spac
