7 Must-Know Mold Precautions Before Buying a House

Buying a home is one of the biggest investments you’ll ever make. While location, layout, and price usually top the checklist, there’s one silent threat that many homebuyers overlook—mold. Before signing on the dotted line, here are 7 must-know mold precautions before buying a house. Left unchecked, mold can lead to serious health concerns and costly repairs down the road.

1. Look for Visible Signs of Mold

During your walkthrough, check for discoloration or water stains on ceilings, walls, and around baseboards. Musty odors, especially in basements or bathrooms, can also be red flags—even if mold isn’t immediately visible.

2. Ask About Past Water Damage

Always ask the seller if the property has experienced any flooding, leaks, or plumbing issues. Even a minor roof or pipe leak can create the perfect breeding ground for mold.

3. Check Ventilation and Humidity Levels

Poor ventilation in bathrooms, attics, and crawl spaces can trap moisture and lead to mold growth. Ask if the home has working exhaust fans and proper attic ventilation. Ideally, indoor humidity should be kept below 60%.

4. Inspect the HVAC System

Mold can hide in air ducts and HVAC units. If the system is old, hasn’t been maintained, or smells musty when it runs, it could be spreading mold spores throughout the home. During most mold scenarios we recommend finding a NADCA-certified duct cleaning / HVAC company

5. Hire a Certified Home Inspector (with Mold Experience)

Not all home inspectors are mold-savvy. Hire someone with specific experience in identifying mold risks or who partners with a mold assessor. If mold is suspected, a professional air quality test or swab test may be warranted.

6. Get a Mold Assessment or Air Quality Test

If there’s any sign of moisture issues, it’s worth investing in a professional mold inspection before you close. This can uncover hidden mold in walls, insulation, or crawl spaces—places not covered by a standard home inspection.

7. Understand the Insurance Implications

Not all homeowner insurance policies cover mold-related damage, especially if it stems from long-term neglect. Make sure you understand what’s covered and consider a policy with broader mold protection.

Mold isn’t just an eyesore—it’s a potential threat to your health and your home’s value. Taking a few extra steps before you buy can save you thousands of dollars and give you peace of mind. WE developed these 7 must-know mold precautions before buying a house.

If you’re buying a home and want a professional mold inspection or second opinion, PuroClean of New Port Richey is here to help. Our team of certified professionals uses industry-leading tools to detect, assess, and remediate mold the right way—before it becomes a problem.