A: Hi Ruth. Please don't take this the wrong way, but I need to ask our readers a question so we can all learn from your stressful experience:

If your best friend's brother was an unlicensed doctor would you go to him for medical attention?

Most people I know would politely turn down the offer, yet many of these same individuals will allow unlicensed tradespeople into their home just because they are "friends of the family."

I know what's done is done in your case, so let's get back to your question. A "mud" based tile shower stall needs to have a copper pan or rubber liner installed during the "frame in" of the shower. This pan or liner is sealed to the special drain assembly on the floor and usually comes up around the walls and threshold of the shower bottom about four to six inches.

Once installed, the pan and drain flange is filled with water to test for leaks. If it passes the leak test, then the concrete base and tiles are installed.

My guess is that you did not pull any permits for this job as well or the building inspector would have stopped construction on the rough inspection.

I'm sorry but I don't have good news for you. From what I have experienced in cases like this, the leaking shower stall base will have to be removed and the job redone according to local codes.

Chances are you will be left holding the bag on this one, and sadly it will probably strain your wallet... and your friendship.