That's not what the code states, however.
Depending on the thickness of the laminate, it could increase th minimum riser height above allowed for the bottom riser and shorten th top riser distance.....Both code violations.
And since the existing riser height already exceeds maximum height according the IRC 2003, any alteration may necessitate the complet reconstruction of the stairway to meet prevailing code depending on th interpretation of the original poster's code enforcement office.
Colbyt already mentioned that in the 2nd post in this thread which ha been largely ignored....but is correct.
Generally speaking, unless we are speaking about using a veneer that i say 1/16th of an inch thick which will be wrapped and glued over th existing treads, what is being proposed by adding a laminate over th existing treads is generally not allowable under code because it cause trip hazards at the top and bottom step and could require the complet reconstruction of the stairway
-- manhattan4
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