Tips for an Easy Subfloor Repair

Subfloor repair might seem like a big job, but you can easily and successfully do this project on your own if you follow a few tips. You will need to repair your subfloor it it has been damaged by water. Underground expansions, plumbing and tree roots may also cause damage to the subfloor. Before you undertake the repairs, you must do an investigation to determine the cause of the subfloor problems.

Removing the Floor Cover

Locate the area that you suspect there might be a subfloor problem, then take off the floor covering over that area. You should carefully remove the floor covers, ensuring that you do not damage the frames beneath. Subfloor consists of 4x8-foot plywood or particleboard sheets. Sagging boards, spongy surfaces and weak boards are some of the signs of a water-damaged subfloor. However, sunlight exposure and aging will also cause bowed or warped subfloors.


When installing the new subfloor, you should ensure that the screw or nail heads are not protruding from the floor beams. Inspect the floor beams and determine if they are also damaged. Remove the affected beams prior to installing the new subfloor.