QUESTION: I have a bathroom shower that is lined with travertine tiles. There seems to be leaking taking place around the grout lines on the tiles, and the drywall seems to be wet after someone ...

Bathroom surfaces might include marble, granite, slate, travertine, or ceramic and porcelain tile. Each has unique characteristics, especially when it comes to porosity.

Marble, travertine, and limestone are sensitive to acids and can be etched by anything containing vinegar or lemon juice. Even if your tile is durable enough to handle acids, the cleaner will ...