To quiet squeaks in floors; I use a small joist block sistered to the original joist, as shown in the drawing. Once I’ve located the squeak, I put a good bead of construction adhesive along the top edge of a block that is the same depth as the existing joist. With the block in place, I use a small jack in the crawl space to press it tightly against the subfloor. Nailed off and jack removed, the job is done.
Ross Fulmer, Atascadero, CA
Edited and Illustrated by Charles Miller
From Fine Homebuilding #42