Hello, we have had long lasting problem with wet tile grout on floor adjacent to toilet and nearby shower dam. Not sure if water is coming from toilet seal or shower pan failure, or possibly both. The house is 14 years old, on concrete slab, and the shower has deteriorated to point that we are in the process off hiring a contractor to replace. He suggested simply replacing the toilet seal now, just in case. Any other suggestions appreciated - thank you very much.