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What Pests Thrive in a Mold-Infested Home?

Last updated October 26, 2026

The short answer

Fungus Gnats and Springtails

Fungus gnats are tiny flying insects that breed in damp soil and organic matter. They feed on mold and fungi, so a moldy area in your home becomes a perfect nursery. You might notice them hovering near houseplants, potted soil, or damp spots in the bathroom.

Springtails are small, wingless insects that jump when disturbed. They thrive in high humidity and feed on mold and mildew. You often find them around drains, in basements, or near leaky pipes. Both pests are more a sign of moisture problems than a serious threat themselves.

Silverfish and Cockroaches

Silverfish are nocturnal insects that love dark, humid spaces. They feed on mold, starchy materials, and even paper. A mold problem gives them both food and shelter, so they may multiply in the same damp areas where mold grows, like under sinks or in closets.

Cockroaches also prefer warm, moist environments and will eat mold and decaying organic matter. Their presence often points to a water issue that needs attention. If you spot them, it is a strong signal that your home has excess moisture that should be addressed.

Rodents and Termites

Mice and rats are attracted to moldy environments because they offer shelter and a water source. They can also carry mold spores on their fur, spreading them further. Rodents often nest in attics, walls, or basements where moisture has softened wood and insulation.

Termites are drawn to water-damaged wood, which is often the same wood that supports mold growth. While termites do not eat mold, they are more likely to infest wood that is damp and decaying. A moisture problem can therefore make your home more vulnerable to structural damage from these pests.

Other Mold-Eating Pests

Several beetles, such as the plaster beetle and the foreign grain beetle, feed on mold fungi. These small beetles often appear in large numbers in damp areas where mold is prevalent. They are harmless to humans but indicate a mold issue that needs attention.

Booklice are another pest that thrives on mold, especially in humid rooms. They are tiny and often found in stored books or paper. Their presence is a clear sign of high humidity. While they do not bite, they can be a nuisance and should prompt you to look for moisture sources.

How to Address Both Mold and Pests

The most effective way to handle pests that thrive on mold is to eliminate the mold and the moisture that feeds it. Start by fixing any leaks, improving ventilation, and using a dehumidifier in damp rooms. Remove moldy materials and clean the area thoroughly.

If the mold covers a large area or has affected drywall or flooring, local water damage pros can help with mold cleanup and moisture control. They have the tools to find hidden water sources and dry out affected areas. You can also take steps to prevent future problems by keeping your home dry and well-ventilated.

  • Fix leaky pipes and roof leaks promptly
  • Use exhaust fans in bathrooms and kitchens
  • Keep humidity levels below 50 percent
  • Remove and replace moldy drywall or carpet
  • Seal cracks and gaps in walls and floors
  • Store firewood and paper away from the home

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Frequently asked questions

Can mold attract pests even if the mold is not visible?

Yes, mold can grow behind walls, under floors, or in attics where you cannot see it. Pests like silverfish and cockroaches can find these hidden spots. If you notice an increase in pests, it is worth checking for hidden moisture or mold with a moisture meter or by calling a professional.

Are these pests dangerous to humans?

Most mold-eating pests are not directly dangerous. They do not bite or spread serious diseases. However, their presence can aggravate allergies or asthma because they move mold spores around. Rodents and cockroaches can carry pathogens, so it is sensible to address them quickly.

How do I get rid of pests that are living in mold?

First, remove the mold and fix the moisture problem. Dry out the area, clean with a mold-killing solution, and repair leaks. Then, clean up any pest droppings and seal entry points. If the infestation is large or the mold is extensive, consider hiring pest control and water damage professionals.

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