Are silverfish a sign of a dirty house? Silverfish love damp places so their presence is more of an indicator of moisture in the home. It might suggest that there is an entry point into your home caused by water damage – like small leak allowing rain water in.

Does seeing one silverfish mean an infestation?

If you see one silverfish, there is a good chance there are hundreds living in your walls. ... It doesn't take long for silverfish populations to get out of hand. They will crawl through your wall voids, pass through attic crawl spaces, get into moist basements, and other dirty moist areas.

Is it bad to have silverfish?

Silverfish feed on starchy materials and items that are high in protein. They are active at night and cause damage to books, stored food, and clothing. While these insects do cause problems, silverfish are not harmful to human health and do not carry any diseases.