Step 3 · Getting the Width Right: From Wall to Wall or Edge to Edge

Next up, we'll tackle the width of each tread. Run your tape measure across the very front edge of the tread, making sure it's perfectly parallel to the back edge where the tread meets the riser. If your staircase is embraced by walls on both sides, measure from wall to wall. If you have an open staircase on one side, measure from the exposed edge of the tread to the opposite side. Remember, for a clean, design-conscious look, standard residential treads typically allow for about a 1-inch space on each side. This means a 36-inch wide stair generally accommodates a 34-inch tread, giving your installation that polished, custom-made to fit appearance.