[villagetinker]

Stu, check your irrigation system, especially the spray head just outside of your shower location. True story: We had our house built, was empty for about 4 months before we moved in. A week before the actual move I came down to a soaked bed room carpet. It turns out the sprinkler head had failed, and the irrigation water was going straight up, hitting the soffit, getting into the the block wall and draining into the bedroom. Took 5 people to eventually determine where and how the water was getting in, including the builder.