Multiracial couple doing spring cleaning

Mold Testing Tips for Spring Cleaning

Housekeeper's Hand With Glove Cleaning Mold From Wall With Sponge And Spray Bottle

Spring cleaning isn’t just about dusting shelves and opening windows. It’s also the perfect time to check in on the parts of your home or building that might be hiding something a little more serious—like mold.

Between heavy rain, leftover moisture from winter, and months of stale indoor air, spring creates the perfect conditions for mold to grow. If you’re already in cleanup mode, here’s how to spot potential issues before they become bigger problems.

Housekeeper's Hand With Glove Cleaning Mold From Wall With Sponge And Spray Bottle
Skirting board on a wall damaged by mold.

Start with the Damp Zones

Some areas are more mold-prone than others. When you’re cleaning, give these spots a closer look:

  • Basements and crawlspaces

  • Under sinks and around toilets

  • Attics and rooflines

  • Windows and exterior walls

Even if you don’t see visible mold, keep an eye out for peeling paint, water stains, or any soft spots in drywall. And trust your gut: if something smells weird, it’s worth paying attention to.

If It Smells Musty, Pay Attention

That damp, earthy smell is often the first sign mold is lurking somewhere nearby. It might be behind a wall, under flooring, or in your HVAC system. If you’re noticing a funky smell that lingers even after you clean, it’s time to investigate.

plumber looking under broken sink in kitchen

Scrubbing Over and Over? That’s a Red Flag

If you’ve cleaned the same spot more than once and the staining keeps coming back, it could be active mold. And while bleach might make things look better, it doesn’t always get to the root of the issue—especially on wood, drywall, or fabric.

Housekeeper's Hand With Glove Cleaning Mold From Wall With Sponge And Spray Bottle

Don’t Guess: Test!

Mold can look like dirt or dust at first. But guessing wrong could lead to health issues or delays in your project. At ETL, we make testing simple. You send a sample, we analyze it, and we help you understand what the results mean.

Esecially if you’re renovating!

Whether you’re removing flooring or opening up old drywall, you want to know what you’re dealing with before disturbing it. Mold spreads quickly once airborne, and if you’re working in an older building, there could be asbestos or lead present too.

Why Choose ETL for Mold Testing in Michigan?

We’re Michigan’s fastest growing mold lab for a reason. We don’t just run your test and send a report—we help you understand it. Our team is known for being responsive, approachable, and easy to work with. We take the guesswork out of mold testing, whether it’s your first time or your fiftieth.

Check out or Mold for Homeowners Page for sampling guides, and more information! 

Frequently Asked Questions

What causes mold in spring?

Mold thrives in warm, damp environments. After winter, melting snow and spring rain often create moisture issues in basements, attics, and crawlspaces.

How do I know if I need a mold test?

If you smell something musty, see discoloration, or recently had a leak or flood, testing is a smart next step—especially before renovations.

Is mold testing required in Michigan?

While testing isn’t always legally required, it’s often recommended during real estate transactions, insurance claims, or before starting remediation work.

Is all black mold “toxic black mold”?

Not necessarily. Many types of mold can appear black, but not all of them are the notorious Stachybotrys chartarum, which is sometimes called "toxic black mold." Only a lab test can confirm what type of mold you're dealing with. If you see black staining or smell something musty, it’s a good idea to test so you can know for sure.

Can mold make you sick, even if you can't see it?

Yes. Mold spores can be airborne and affect your health even if the mold isn't visible. People with asthma, allergies, or weakened immune systems are especially sensitive to mold exposure. That’s why testing the air can be just as important as testing surfaces.

How much does mold testing cost in Michigan?

Mold testing costs can vary depending on the type of sample (air, swab, bulk material) and how quickly you need results. At ETL, we work with homeowners, contractors, and remediation firms across Michigan to provide fast, affordable lab analysis. Contact us for current pricing and sample submission instructions.

Need Help? Let's Talk.

If you’re seeing signs of mold or planning a spring project where mold could be a concern, let us know. We’ll help you choose the right test and walk you through the next steps.

Just fill out the form  below and someone from our team will reach out to you directly. We’re here to help.

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