Rental townhouse, low budget. I have two small bathroom floors with glued asbestos 12x12's onto the subfloor (1976 original) w/ cutback, I think. Floors will be getting 12x12 ceramic. The carpeting outside the bathrooms is higher, given the pad/carpet combo. What do you guys typically do with these? Add a layer of ply/ditra or ply/durock, etc., or do something else?