Abstract: An old bath is renovated by selecting a new bath, e.g., a plastics bath, having a tub to fit within the old tub and a surround to extend over all the surround of the old bath, cutting the surround of the new bath to suit adjacent wall surfaces when the new bath tub is centralized in the old bath tub, cutting away the old tub around old drain and overflow fittings and removing them, installing new drain and overflow fittings to suit holes cut in the new bath tub, applying insulating adhesive filler to the bottom of the old tub and the existing surround, fitting the new bath in place and connecting the new drain and overflow fittings, and loading the bath while the filler sets and adheres between the old and new baths, any joints with adjacent wall surfaces being filled with a sealant.