At some point in life, we’ve probably all experienced mold growing on food and maybe wood or other materials that have started to mold. But can mold grow on a hard surface like concrete?

The answer is yes—mold can grow not only on concrete but also in concrete as the surface begins to degrade from the mold. But while it’s possible, it does require the right conditions to occur.

How mold growth occurs in concrete

Mold requires a few basic things to live: food, moisture, the right temperatures, and oxygen.

Concrete alone isn’t a sufficient food source for mold, but any dust or debris that collects on the concrete surface can be. That means keeping concrete surfaces clean can help reduce the likelihood of mold.

Moisture is a key factor in mold growth and often the key preventative measure. Mold is more likely to grow in locations with high humidity or surface moisture, such as concrete parking garages with insufficient drainage.

Mold typically grows in warmer temperatures, such as 70 degrees Fahrenheit and above. That means it can grow outdoors during spring and summer months and indoors throughout the year, depending on the temperature of the space.

Steps to prevent mold growth in concrete

The first opportunity to prevent mold growth in concrete occurs during installation. Proper setup should be used to control temperature and humidity during installation so that the concrete sets up in the proper drying time.

Good drainage and humidity control go a long way in preventing mold on concrete. This may include ensuring water diverts away from concrete as it drains, improving ventilation, or using a dehumidifier in high humidity indoor locations.

Regular cleaning and maintenance also can help prevent mold growth in concrete. Regular cleaning helps remove the food source for the mold and can remove any mold that has started to grow. Sealing the concrete surface can also reduce moisture penetration and the chances of mold growing and damaging the concrete.

Mold can cause serious health issues for occupants of a building, and it can stain your concrete and create an unsightly appearance. If you need assistance removing mold stains from a concrete surface, contact us today for more information.

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