Staircases that squeak are quite annoying, so if you have one with this problem you probably want to know how to fix it. You should first know the anatomy of a staircase. Its main parts are the tread (the horizontal part that you step on), the riser (the vertical part making a joint with the tread) and the banister (the side component that you hold onto while walking up or down). The banister is made of the handrail (the part which you grasp), the balusters (vertical posts along the length of the banister) and the newel post (a larger post at the bottom of the staircase).
When you work from below the stairs on making the squeaking stop, you should have these prepared: wood shims, a hammer, yellow carpenter's glue and a small wood block. It may be dark below the staircase so you should have a flashlight or some other source of light with you. Falling debris can hurt your eyes, so put on your goggles for safety. Ask a friend or family member to walk on the staircase so that you notice where the problematic spots are and what exactly moves there. Cover the wood shims in glue and place them with their thin end forward into the joint formed by the tread and the corresponding riser, where the squeak sound occurs. Tap the shims and drive them in by placing the block of wood between the hammer head and the large end of the shim.
When fixing the problem from above the stairs, these are the items you will be using: pencil, measuring tape, electric drill, screwdriver, flathead wood screws size 2
What you will actually do is tighten the joint between the riser and the tread by tightening a screw that will hold them together. For starters, if the tread is not flush with the riser, make a measurement so that you mark the point where the two meet. You will make drills through the tread into the riser and you should get to the center of the latter when doing this. It is useful to know that the edge of a riser is usually