wrote in message
ups.com...
Say some more about the age of the house, the span length of the floor
joists the cross section of the joists, and the material of the
subfloor. This would not be the first house with joists not sized for
the spans; or not sized for the loads; or structural panels that are
too closely fitted; or older construction that has been damaged by
moisture or insects in the crawl space.
TB

Usually, a squeaky floor is caused by a loose nail (or maybe several)
holding the flooring and subflooring to the joists.

The solution is to identify the squeaky areas and drive a screw through the
floor, subfloor, and into the joist.

The problem is that if you have floorcovering already installed, you can't
just go around driving screws through it or you'll ruin it.