How Much Can Stair Risers Vary?
How Much Can Stair Risers Vary? The stair riser code is up to 7.75 inches, and can not vary more than 3/8 of an inch. How much can steps vary in height? Per the latest edition of the 2012 International Residential Code (IRC), the maximum allowed difference in riser height is 3/8′′. (This means that