[Shop-talk] Flooring for uneven basement?

[Jim Franklin]

I'm renovating a basement and need to put down a finish floor. The concrete is
90 years old and very uneven. Other than 1000 gallons of self-levelling goop,
I'm at a loss as to how to accomplish this other than making a 2 sq ft grid
and shimming each joint. 2 problems with this- I can't lose more than 3" of
height, and the entire basement would need to be cleared to do this, and
there's many cubic yards of stuff down there that has nowhere to go.

thanks,