Signs You May Have Crawlspace Mold

Signs You May Have Crawlspace Mold

Published by Remtech Environmental Team · Last updated April 2025

At Remtech Environmental, we are used to dealing with mold. We have extensive experience in the mold remediation business, and we offer services to help you protect you and your property from this family of organisms. Some parts of your home are more vulnerable to mold than others, so it’s important to pay special attention to these areas. In this article, our team will focus on one such area: the crawlspace. Keep reading to learn a few signs to look out for to tell if you have crawlspace mold.

• Discolored Walls – One sign you may have crawlspace mold is stains or discolored patches appearing on your floor joists or subfloor. If dark patches appear on these structures, give us a call—they might not be caused by dirt but instead by mold growth.
• Powdery Substance – In addition, we encourage you to keep a close eye out for light-colored, powdery patches appearing on your wood members in the crawlspace. Mold isn’t always black or green in color but can often look like a white or gray powder. If you notice this kind of stain or growth appearing in your home, we encourage you to get your home checked for crawlspace mold.
• Respiratory Symptoms – The last sign of crawlspace mold we’ll cover here is an increase in allergy-like symptoms. If you or anyone else in your household is coughing or sneezing a lot, or experiencing other respiratory issues, then it’s possible those symptoms are caused by mold spores.