Laying laminate after adding 1/2" plywood to eliminate transitions at tile interfaces. Plan for stairs is to carpet them, or install new stained treads & risers, or ... Something else.
Of course one problem is the extra height added from top step to floor. Used to be 8 3/8", now it'll be 9 3/4" (1/2" plywood, 9/16 bullnose, 5/16 laminate). The other step heights averaged 7.5".
Question #1. For the previous height difference, is it normal to have the top step height to be 8 3/8" while the other steps are 7.5" ? Or did the builder make a mistake, maybe by not accounting for 3/4" sub flooring in his stringer calculations?
Question #2: What is typically done for these steps when height is added?
Question #3: How to accommodate the added first step height? I could shim/stub the treads, transitioning from bigger shim at top step to smaller shim at bottom step. Would not have uniform step heights but height difference between 2 consecutive steps would only be 1/8".