Basement flooring question
Last Nov I had an interior perimeter drain installed in the basement and prior to that, asbestos tiles abatement. The abatement company had a very difficult time removing the mastic, none of the removal solutions worked, and they had to use a cutting tool to remove all the mastic by the perimeter of the wall. There are still patches that weren't fully removed. They sealed the surface of the mastic, but there is no way that mastic will come apart without power tools.
I am looking to add flooring to the concrete. My contractor suggests putting laminate with a good layer of underlayment. Other friends tell me I need a subfloor. In my case, there are sections of the floor that have patches of mastic. They aren't thick, but they are not smooth. I looked up dricore, and it seems it requires a level ground. What are my options?