Installation Guide

2. Remove the tread from the stair. Using a 3/16” masonry drill bit and your
hammer/power drill at each marked spot, drill a hole into the concrete deep enough to
accommodate the length of the concrete screw you are using. Make sure that you are
drilling perpendicular to the surface.
Use caution when drilling the holes. If the concrete is not in good condition or you are
drilling too close to the edge, the concrete can fracture. This would prevent you from
using this location and will necessitate the need to relocate the tread.
To ensure that you are drilling deep enough, attach a piece of tape to the drill bit at the
height of your screw. For example, if you are using a screw that is ¾” long, attach the
tape ¾” above the tip of the bit.
In the picture below, the tape has reached the surface, indicating that the hole is at the
perfect depth.