Dry House Notes

How a Toilet Base Leak Can Fuel Bathroom Mold Problems

Yes, a toilet base leak is a common hidden cause of bathroom mold. Water seeping from the base of a toilet saturates flooring, subflooring, and baseboards, creating the damp environment mold needs to grow. Many homeowners clean visible mold on tile grout or caulk but overlook the chronic moisture source right under the toilet. Fixing that leak is a critical first step before any tile mold remediation can succeed. Why Toilet Base Leaks Are Easy to Miss A toilet base leak is