- Measure the old stair tread or the area your stair tread will cover. Use a measuring tape or stair gauge to measure the width, length and depth of the original stair tread board. A typical stair tread's surface is approximately 11 inches deep from the stair edge to the corner between steps.
- Measure a board matching your stair tread measurements. Use your pencil to create cut lines along the board matching the measurements.
- Check your measurements at least twice to make sure they're correct before taking a saw to the board.
- Cut out your tread board with the circular saw, making sure to cut along the cut lines you made with your pencil.
- Place the tread on your stairs to make sure it fits correctly.
Things You Will Need
- Measuring tape or stair gauge
- Circular saw
- If you want your stair tread to have a bit of a ledge at the edge, add approximately 1/2 inch to the width of the stair tread's surface.
- If you're using decking boards to create your stair surface, add 1/4 inch to your measurement for the width of the stair tread's surface. Decking boards are installed 1/4 inch apart from each other to allow for wood swelling.
- If you're questioning your measurements, measure the tread area again before you cut. If you're still unsure, go larger. You can always cut down a board that's too big.