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What Should I Do If I See Mold During a Home Inspection?

Last updated October 25, 2026

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The short answer

Assess the Mold

First, determine whether the mold is surface-level or indicates a deeper problem. Surface mold on tiles or grout may be a simple cleaning issue. Mold on drywall, wood, or insulation often means moisture has been present for a while, and the material may need replacement.

Look for signs of water damage nearby, such as stains, peeling paint, or warped flooring. If you see mold, you should also check for leaks, poor ventilation, or high humidity. In a humid climate like Detroit's, moisture problems can be persistent, so take them seriously.

  • Identify the mold type if possible (e.g., black mold, mildew)
  • Check the size of the affected area
  • Look for visible water stains or discoloration
  • Feel for dampness in walls, floors, or ceilings
  • Note any musty odors
  • Take photos for your records

Find the Moisture Source

Mold cannot grow without moisture. Your priority is to locate the source of the water. It could be a leaking pipe, a roof leak, poor drainage, or condensation from high humidity. A moisture meter or thermal imaging can help detect hidden dampness.

If you are considering buying the home, you may want to hire a professional to perform a water damage inspection. They can use specialized equipment to find moisture behind walls and under floors. Addressing the source is essential before any mold removal can be effective.

  • Check under sinks and around toilets
  • Inspect the roof and attic for leaks
  • Look at the basement or crawlspace for seepage
  • Examine windows and doors for condensation
  • Test the humidity levels with a hygrometer

Decide on Next Steps

If the mold is small (less than a few square feet) and the moisture source is easily fixed, you might handle it yourself with soap and water. However, if the mold covers a large area or is inside walls, professional help is often necessary. Mold can cause health issues, so do not ignore it.

Consider the cost of remediation versus the value of the property. If you are a buyer, you may negotiate with the seller to fix the problem or adjust the price. If you are a seller, you may need to address the issue before closing. Always get a clear assessment from a qualified professional.

Protect Your Health

Mold can trigger allergies, asthma, and other respiratory problems. If you feel unwell during the inspection, leave the area and see a doctor if symptoms persist. Wear protective gear like gloves and a mask if you must be near the mold.

Do not attempt to clean large mold infestations without proper equipment. The pros use containment measures to prevent spores from spreading. Your health and safety come first, so take precautions seriously.

Know When to Call the Pros

If the mold covers more than a small patch, or if you suspect it is inside walls or HVAC systems, it's time to call local water damage pros. They have the tools and training to assess the extent of the damage and remove mold safely. They can also identify hidden moisture that you might miss.

For a thorough evaluation, consider a water damage inspection or thermal imaging inspection. These services can reveal the full scope of the problem. The cost depends on the size of your home and the extent of the damage, and it varies by situation. Policies vary, and your insurer decides what is covered.

If you live in Detroit, keep your shutoff valve location written down so you can stop leaks quickly. Acting fast can limit mold growth.

Talk to someone now

Water keeps spreading into floors and walls, so it is worth acting early. Calls are answered 24/7.

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Frequently asked questions

Can mold in a home be a deal-breaker?

It depends on the extent and cause. Small, surface mold might be easily fixed. But if mold is widespread or indicates a serious moisture problem, it could affect the home's value and your health. Get a professional assessment before deciding.

Should I test the mold before buying?

Testing can be helpful, but a visual inspection by a professional is often enough to identify the problem. If you are concerned about health risks, you can ask for a mold test. However, the most important step is finding and fixing the moisture source.

Can I remove the mold myself?

For small areas, yes, using detergent and water. But for larger areas or mold inside walls, professional removal is safer and more effective. You must also address the underlying moisture or the mold will return.

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