One of our basement rooms has an unleveled concrete floor with a square wooden well lid (2ftx2ft) in the center. We used to have carpet in the room, and it was obvious the carpet was uneven. How should we go about leveling this floor? A wood subfloor seems like too much work, can we fully cover or seal up the well with a floor leveler (must the lid always be easily accessible)? After leveling, can we put laminate flooring on top (will there be moisture problems)?
As I understand, it's a well/drain that's part of the city sewer system. The house is >70 years old, and in the 15 that we've lived in it, I haven't had a flooding problem yet. But, we are still wary of sealing the entire floor with floor leveler. However, if we level the floor around the 2ftx2ft lid, there will inevitably be some air between the floor and the lid, and don't know if its secure to put laminate over that. Also, we're not sure if that room would be too moist for laminate flooring.