How far should stair nosing stick out?

Sunday, March 22, 2020

A nosing should not extend past the face of the riser below it less than 1/4 inch or more than 1-1/4 inch, according to the International Residential Code (IRC R311.7.5.3). A nosing is not required for treads 11 inches or more. Since the minimum size tread is 10 inches, this means that treads between 10 and 11 inches need a nosing to provide additional surface for a shoe heel on the tread.

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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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