Squeaky/Loose ("Popping") in Hardwood Floors

What it is:

The floor causes objectionable squeaks or other noises.

Cause:

~ Movement of the wood flooring system. subfloor system or underfloor supports.

~ Inadequate or improper nailing.

~Weak subfloor.

~Improper subfloor material.

~Insufficient or incorrect adhesive.

~Floor subjected to excessive moisture or excessively dry conditions.

Cure:
Noises in only certain areas may be fixed by Injecting adhesive into the problem area, screwing the floor down from below, strengthening the subfloor from below or using facenails or screws and plugs. Squeaks also may be lubricated with graphite, wax or baby powder, although such solutions will contaminate the floor for future finishing.
Floors that are noisy and loose throughout the entire area usually have to be pulled and reinstalled, correcting the problem-whether it is caused by the subfloor, fastening schedule or adhesive.