If you prefer stronger cleaning agents or you're concerned about the effect of your local water on your shower floor, a ready-made shower base may be a better choice, since it won't stain as easily as tile. Tip: Not all shower bases are created equal. Many are slightly flexible and can benefit from the use of a concrete bed underneath. Double-check with the manufacturer that this is OK before purchasing, and make sure that this is done during installation. Often, this flexibility will lead to a leak at the drain connection, so extra care is needed to carefully support the drain at the drain connection area.