Flooring defects can be divided into two groups damage to the finish or flaws in the flooring itself. The first group requires a trip to the paint store as a starter. Defects in the second group requires some carpentry.
Sagging Floor. You don't usually notice low spots in your floors or pay much attention to those that shake when walked over or jumped on-not if you have lived with them for a long time. Such floor troubles develop so slowly that they's hardly notice able as you gradually become accustomed to them. However, there comes a time when, for safety's sake alone, repair and correction are necessary.
Timber shrinkage over a period of year, warping and twisting of floor joists and the occasional failure of the timber to stand live loads account for most of the trouble.
These conditions on the first floor of the house are usually curable, often with very little effort or expense. The plan of the house extent of the trouble govern the ease with which corrective measures can be accomplished. A typical first-floor structure consists of a girder laid across the central area of a basement, resting on the foundation at its ends and supported by one or more posts in the midsection. At right angles to and supported by the girder are the floor joists, themselves supported at their outer ends by the foundation or house sill. At right angles or on a diagonal to the joists, are laid the rough flooring boards and across this subfloor the finish floor boards are nail.
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