Dry Wall Journal

What to Check First When You Find Bathroom Surface Mold on Grout and Caulk

Bathrooms are the most moisture-prone rooms in a home, and the places where mold shows up first are almost always the same: the grout between tiles and the caulk along edges and corners. These materials are porous, they stay damp longer than other surfaces, and they trap soap scum and organic matter that mold feeds on. For a homeowner, spotting dark spots on grout or a black line along the caulk is not unusual, but knowing what to check first can mean the difference between