Step 3 · Step 3: Measure Each Tread's Width (Side to Side)

Now, let's measure the width. For each step, run your tape measure horizontally across the front edge of the tread, keeping it parallel to the back riser. If your staircase is enclosed, measure from wall to wall. If one side is open, simply measure the full width of the visible wooden tread. For a timeless, design-conscious look that beautifully frames your new treads, we suggest planning for about a 1-inch space of exposed wood on each side. This setback is a standard practice that enhances the final appearance.