I want a wooden staircase instead of the existing concrete staircase that currently serves as the entrance to the house. This one has four steps and is cast in one piece connected to the house's foundation. The simplest way is to leave the concrete staircase and build the new staircase over it. I am unsure how it would work with drainage, i.e., if too much moisture would accumulate and eventually damage the wood. It might be better to remove the concrete staircase (in itself a tricky project that I would prefer to avoid). Does anyone have experience with this?