How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manufactured and modular homes
Is a stair nosing required by code?
Sunday, March 15, 2020
A stair nosing (extension of the tread past the front face of the riser below) is only required when a tread is less than 11 inches, according to the International Residential Code (IRC 311.7.5.3). Since the minimum tread allowed is 10 inches, a nosing is only required for treads between 10 and 11 inches. Other criteria are that “the greatest nosing projection shall not exceed the smallest nosing projection by more than 3/8 inch,” and “beveling of nosings shall not exceed 1/2 inch."
Also see our blog post Do stair tread edges have to be rounded?
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Here’s links to a collection of our other blog posts about STAIRS:
• What do home inspectors check when inspecting stairs?
• Is a landing always required at the top and bottom of stairs?
• When is a railing required at stairs?
• What is the building code for the minimum height of stair steps (risers)?
• When is a nosing required on a stair tread?
• What is the building code requirement for receptacle outlets at stairs and stair landings?
• Are open stair risers acceptable?
• What is the steepest residential stair allowed?
• Why is a single step dangerous in a house?
• Do I need stairs at all exit doors from a mobile home?
• The stairs feel too steep. What's the building code?
• What is the longest stair run allowed?
• What is the lighting requirement for stairs?
• A light is required over a stair after how many steps/risers?
• When is safety glass required for windows at stairs and stair landings?
Visit our STAIRS page for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles.
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