Step 3 · Step 3: Determine Your Ideal Tread Width

Next is the width. Measure across the tread from side to side, keeping the tape parallel to the back riser for an accurate reading. For stairs enclosed by two walls, measure wall-to-wall. If one side is open, measure from the finished edge of the stair to the wall or 'stringer' (the side support board). For that beautiful, professionally finished look, we recommend leaving about a 1-inch border of exposed wood on each side of your carpet tread. So, for a 36-inch wide stair, a 34-inch tread is the perfect choice to bring warmth and elegance to your home.