We are having our bathroom in the basement redone. Having a tub installed and the installer cut a 2 ft wide hole in the floor beneath the tub. after the tub is installed I was told that they no longer fill in the 2x2 ft hole.
However the dirt shows moisture. Seems unclean and unwise.
What can I pour into the hole to seal it?
A gallon can of water based exterior polyacrylic?
I asked if I can pour in liquidity cement and they said that is no longer done.