Joining Stair Railing

Measure the length of the stairway to determine the required length of the railing. Double-check the measurement to ensure it is accurate before recording it. Ensure the two or more railings will cover the span of the stairway when installed.

Lay a handrail on the miter saw table. Set the miter saw to 45 degrees. Form a 45-degree cut on one end of each handrail, so they form a 90-degree joint when attached to each other. Align the miter saw to form the miter cut slanted to the right of one handrail, and to the left for the other, so they fit snugly.

Spread an even layer of wood glue over the mitered ends of the handrails using a small paintbrush. Alternatively, apply 90-second epoxy over the mitered ends.

Center and join the two glued ends of the handrails together so they form a single piece. Press the joint to ensure a strong bond. Clamp the joint and set the railing on a level floor.

Wipe away excess adhesive that emerges out through the joint with a wet rag. Allow the adhesive to dry for the time specified on its label directions.

Rub the joint with fine-grit sandpaper when the adhesive is cured, moving your hand in the direction of the wood grain, to completely smooth its surface.

Shoot evenly spaced 4d finish nails through the sides of the joint in the rail for added security, especially if no mounting bracket will be installed directly underneath. Cover the nail heads with tinted wax putty and leave it to cure for the time specified on the label directions. Sand the cured putty and apply touch up paint so it blends with the surrounding railing surface.