How to Install Interior Metal Stair Balusters

Saw each existing wood baluster along the stairway in half using a handsaw. Grasp each half of the baluster and pull it out to release it from the corresponding hole in the railing and tread.

Clean the insides of the holes with a chisel or a putty knife to remove accumulated dirt, debris and adhesive.

Amend the size of the holes along the undersides of the railing and the treads to accommodate the iron balusters, depending on their sizes, using a power drill with a hole saw. For instance, you need a 3/4-inch hole for a 1/2-inch square metal baluster, and 7/8-inch holes for 9/16-inch balusters. Drill the rail holes 1 1/2 inches deep and those in the treads 3/4 inch deep.

Extend the measuring tape from the tread up to the lower side of the handrail, and note the distance. Cut the balusters 1 1/2 inches longer in length using a jigsaw with a metal cutting blade. Because the decorative accents on most balusters are closer to the top, trim excess length along the lower ends.

Slide a baluster shoe or cap on a baluster. Insert the tip of the baluster into the hold in the handrail, and then its lower end into the hole in the tread. Tape the upper end of the baluster to prevent the epoxy you will insert into the holes from dripping down.

Apply epoxy into the holes in the rail and the tread to secure the metal baluster in place. Repeat the process for the remaining balusters along the stairway. Allow the epoxy to cure for the time specified on its label’s directions.

Remove the lengths of masking tape from the upper ends of the balusters when the epoxy cures. Tighten the setscrews provided with the decorative caps or shoes to secure them over the holes.