Which item is crucial for checking the structural integrity of plywood subfloors?

The most crucial item for checking the structural integrity of plywood subfloors is a moisture meter to detect trapped moisture. Moisture levels play a significant role in determining the condition of the subfloor. Excess moisture can lead to a variety of problems including mold growth, wood rot, and deterioration, which ultimately compromise the strength and stability of the subflooring.

Using a moisture meter allows a technician to accurately assess moisture content in the plywood, which is essential for identifying whether the material is at risk or needs remediation. A heightened moisture level often indicates that the subfloor may be weakened, affecting its overall integrity and necessitating further investigation or replacement.

Other options, while they may have their roles, do not specifically address the critical need to evaluate moisture levels, which directly correlate with the structural integrity of the plywood subfloor.