Step 1 · Locate Squeaky Tread

From underneath the staircase, have an assistant walk up and down the stairs. Carefully listen to pinpoint the exact location of the squeak. You'll want to identify the tread (the horizontal part you step on) and the riser (the vertical part between treads) that are moving against each other or against the stringer (the support beam for the stairs). Mark the area with a pencil if necessary for easy reference.

Tools and Materials