Fixing Sagging Floor Joists
A pronounced slope in the floor is disconcerting. Either the joist ends have rotted where they sit in pockets in a masonry wall, or the loading of the joist(s) has caused it to develop a downward curvature called a crook. If the joist ends have rotted, several techniques may be used to re-secure the joists. When a joist has developed a crook, however, producing a bowl-shaped floor, the inclination is to jack it up. But, no matter how slowly you go about it, jacking usually produces disappointing results. Once the wood has deformed over time, it’s hard to undo it. Also, the flooring itself, and fasteners, have deformed in accommodation to the bowing, and resist being reversed.