Step 3 · Step 3: Measure Twice, Cut Once for a Perfect Fit
Carefully measure the width of the stair opening for each tread you're replacing—don't assume they're all identical! Mark these measurements clearly on your new treated lumber. Using a circular saw or a handsaw, make your cuts. Strive for perfectly straight, square cuts, as this will ensure your new treads fit beautifully without any unsightly gaps.