Shower pans and pan liners may not seem to be a very interesting subject for discussion. First of all, one cannot see them once the installation is complete. And then, because they are out of sight and mind, you tend to forget about them. That is, until problems surface in the form of odors, drain blockage and bacteria growth.
Hence, an improperly specified or installed shower pan or pan liner can often become a source of serious and costly problems. Sometimes they can even create environmental concerns.