What is the proper rise and run for concrete steps in New Brunswick?

The NB Building Code requires exterior concrete steps to have a rise (vertical height per step) between 100 mm and 200 mm (4–8 inches), and a run (horizontal tread depth) of at least 210 mm (about 8.25 inches) — but comfortable, code-compliant residential steps typically aim for a 7-inch rise and 11-inch run. The relationship between rise and run determines how comfortable and safe the steps are to use, which matters considerably in an NB winter when you're navigating icy steps in heavy boots.

The classic rule of thumb used by experienced concrete contractors is the 2R + T = 24–26 inches formula, where R is the rise and T is the tread (run). A 7-inch rise and 11-inch run gives 2(7) + 11 = 25 — a comfortable, natural stride. This formula is a guide based on human biomechanics, not just code compliance.

For NB homes, 7-inch rise and 11-inch tread is widely regarded as the best combination for residential front steps. Here's why that matters practically:

• A rise higher than 7.5 inches feels steep and fatiguing, especially when carrying groceries or helping elderly visitors. In NB winters with winter boots and slippery conditions, steep steps are a fall hazard.
• A tread shallower than 11 inches doesn't provide enough room for a full foot placement in winter boots. NB winter footwear is bulkier than warm-weather shoes — 11 inches minimum, 12 inches preferred, gives a secure footing surface.
• Consistency is as important as the dimensions. Every step in a flight must have identical rise and run — the NB Building Code allows maximum 3/8 inch variation between any two steps in a flight. The human body memorizes the rhythm of a staircase after the first two steps; an inconsistent step breaks that rhythm and causes falls.

Code Requirements in NB

The National Building Code of Canada (NBC) as adopted in New Brunswick sets these minimums for exterior stairs:

• Minimum tread width: 210 mm (8.25 inches)


• Maximum rise: 200 mm (7.87 inches)


• Minimum rise: 100 mm (3.94 inches)


• Maximum variation in rise between steps: 9 mm (3/8 inch)

For steps serving an entrance used by the public or a rental unit, handrail requirements kick in at 3 or more risers — a graspable handrail must be installed on at least one side.

Tread slope for drainage: Exterior step treads should slope forward (toward the edge) at approximately 1–2% to encourage water to run off rather than pool. Standing water on step treads creates ice in NB winters — a gentle forward pitch is a safety feature, not just an aesthetic preference.

For a custom step project or to confirm code compliance in your municipality, New Brunswick Concrete can connect you with experienced step contractors in Moncton, Fredericton, Saint John, Bathurst, and beyond.