Our Alcove bathtubs have tile flanges on three sides for a seamless transition into your wall covering. Some alcove models have built-in aprons and some require one to be built.Our Drop-in bathtubs have no tile flange which allows for more flexible installation. Our drop-in tubs require a full frame to be built around the tub.If you are unsure which bathtub is right for you, please be sure to consult your plumber or contractor, as they will have the best advice regarding your installation area.