Mold testing image of a cartoon man testing air particles

Why That Musty Smell Could Be a Warning Sign

July 06, 20251 min read

You walk into your basement or crawlspace and smell... something. It’s earthy, damp, and unpleasant. You spray some air freshener and move on. But that musty odor could be telling you something important: there may be mold growing behind the scenes.

Here’s what you should know about that smell:

  1. Mold Has a Signature Scent: The musty smell often comes from microbial volatile organic compounds (MVOCs), which are gases released by mold as it grows. If you smell it, there's a high chance mold is nearby.

  2. You Won’t Always See It: Mold often hides behind walls, under carpets, or inside HVAC systems. Just because you don’t see visible damage doesn’t mean the problem isn’t real.

  3. Air Fresheners Can Make It Worse: Covering the smell with sprays or candles won’t solve the issue and could add more irritants to your air. It’s like putting a Band-Aid on a leak.

  4. Moisture Is the Root Cause: Musty odors usually follow water issues — leaks, high humidity, or poor drainage. Fixing the moisture source is critical.

  5. It’s Not Just About Smell — It’s About Health: Breathing in mold-related particles can affect your health, especially if you have allergies or asthma.

Bottom Line? Trust Your Nose.

If something smells "off," get it checked. MacLean Environmental specializes in identifying and addressing the source of indoor air problems so you can breathe easy again.

Evan Cauler, CMI, CFST, is a licensed environmental professional with experience addressing concerns in both residential and commercial settings, who has also worked on environmental projects for local and national government agencies. Evan established MacLean Environmental with a dual commitment to service excellence and environmental stewardship. His leadership and expertise have been instrumental in guiding homeowners, insurance professionals, and businesses towards a cleaner future.

Evan MacLean Cauler

Evan Cauler, CMI, CFST, is a licensed environmental professional with experience addressing concerns in both residential and commercial settings, who has also worked on environmental projects for local and national government agencies. Evan established MacLean Environmental with a dual commitment to service excellence and environmental stewardship. His leadership and expertise have been instrumental in guiding homeowners, insurance professionals, and businesses towards a cleaner future.

LinkedIn logo icon
Instagram logo icon
Back to Blog