Step 5 · Check for Stair Squareness and Level

Use a carpenter's square to check if the corners of each tread are at a 90-degree angle. Use a level to confirm that the tread surface is flat and level from front to back and side to side. Note any discrepancies or deviations from square and level. These imperfections will need to be accounted for when cutting and fitting new treads, potentially requiring shims or adjustments.

Tools and Materials