I live in an 1885 greek revival in the D/FW area in Texas. (I say this because of the soils in the area). The upstairs is more unlevel than down stairs but does slope to the same direction. Two of the bedrooms, where the slope is the worst, have sagging floors. They are hard wood. The floors sag in to the middle in both rooms. Under the rooms are two living areas but show no sign of the sag from down stairs. Has any one heard of this?