How to Clean Grout and Keep It From Getting Gross Again

The porous nature of grout makes it susceptible to grime, but experts offer several tricks to maintain stain and mildew-free tiles. Over time, white grout lines can yellow and dull, or even darken and stain. Fortunately, cleaning grout doesn’t have to be a difficult task.

What is Grout?

Grout is a paste-like construction material primarily made from cement-based powder. Cementitious grout consists of cement, water, aggregate materials, and sometimes sand. Epoxy grout, made from epoxy resins and a filler powder, is an alternative. This article will focus on cementitious grout, the most common type found in homes.

Why Does Grout Get So Gross?

Grout’s porosity allows it to absorb liquids, grease, and dirt. Improper sealing increases this absorption and discoloration. Common culprits include spills, cleaning residue, and mold/mildew buildup. Regular cleaning and proper cleaners are key to prevention.

Does Grout Need to Be Maintained?

All grout types require regular cleaning, and cement-based grout needs occasional resealing. Consistent maintenance, such as immediate spill cleanup and adequate ventilation, will improve appearance and longevity. Avoid abrasive cleaners that can damage grout and strip away sealant.

How to Clean Grout

For lightly soiled grout, the following steps should suffice. Photo: chuckcollier/Getty Images