I am trying to install a bath tub in the basement. Manufacturer recommends that the bath tub be set in a bed of mortar. I followed a recommendation in one of the threads and used a 6 mil poly on top of the mortor bed to prevent the mortar from sticking to the underside of the tub. However, I have a feeling that the poly did not deflect enough and let the mortar to sink in between the ribs of the tub. The tub sunk into mortar by about 1/4" maybe.
Am I better off removeing the tub and redoing the mortar bed?