← Guide
Stair Tread Sizing
Step 4 of 6
Video coming soon
Step 4 · Factor in the Nosing for Total Depth
The total tread depth is a combination of the 'run' you measured in Step 2 plus the 'nosing'—that part of the tread that hangs over the riser below. Building codes typically require this overhang (usually between 3/4 inch and 1-1/4 inches) because it adds crucial space for your foot, preventing slips. The formula is simple: Total Tread Depth = Actual Tread Depth + Nosing. This is how you achieve a professional, safe result.
A common and comfortable tread depth is between 10 and 11 inches. Check local codes for specific requirements.
A common and comfortable tread depth is between 10 and 11 inches. Check local codes for specific requirements.
General Hazard
Insufficient tread depth or nosing can lead to instability and falls. Always adhere to code requirements.
Subscribe for exclusive updates
Be the first to know about promotions, new products, and sales.