Mold in Homes Frequently Asked Questions

The short answer is yes. Mold spores are naturally present in all environments, indoors and outdoors. However, an indoor mold growth source should never be present. The real concern isn’t the presence of spores, it’s when moisture problems allow those spores to grow and multiply on building materials - increasing exposure to potentially dangerous levels.

Not necessarily. Mold often grows where you can’t see it—behind walls, in attics, or under flooring. Just because you don’t see growth doesn’t mean it’s not there.

Air purifiers can help reduce particles in the air, but they don’t eliminate the mold releasing those particles. As long as the growth is there, it will keep producing spores.

Painting over mold is like putting a bandage on a bigger issue—it doesn’t make it go away. Mold will continue to grow beneath the paint if not properly addressed.

Cleaning with vinegar or bleach may remove the visible signs of mold, but it usually doesn’t eliminate it at the root—especially in porous materials like drywall or wood. Professional remediation is often needed.

Not always. Some people are very sensitive to mold odors, while others can’t smell it at all. And some mold doesn’t produce a strong odor. Smell alone isn’t a reliable test.

No. Mold-resistant paints are good for prevention, but they don’t kill existing growth. You need to remediate any existing growth for mold-resistant pain to be effective.

Not always. Tools like cavity samples and moisture meters can help us detect hidden mold without major demolition. Sometimes we may need to drill a small hole - no wider than a common nail.

Yes. Mold doesn’t simply “die” when moisture is gone. It can lie dormant for years, reactivating and releasing new spores once it has a viable moisture source.

Yes. Mold exposure can affect people in many different ways, depending on the type of mold, the level of exposure, and individual sensitivities. Reported reactions range from mild allergies - such as sneezing, itchy eyes - to more significant respiratory problems, as well as neurological, gastrointestinal, and dermatological symptoms.

Yes. Different people react differently to mold. What bothers one person might not affect another. Sensitivity varies widely.

Mildew is actually a type of mold, usually appearing as a flat, powdery growth on surfaces. Mold is a broader category that includes many types, some of which are much more dangerous.

Under the right conditions—moisture and organic material—mold can begin growing within 24 to 48 hours.

All mold should be treated with caution. Some molds are more associated with health risks than others, but labeling them ‘safe’ isn’t accurate. It’s more about exposure levels and sensitivities.

Sometimes, but usually only if the mold is a result of a covered event, like a burst pipe. It often doesn’t cover long-term issues caused by leaks or maintenance problems.

This depends on local laws, but typically landlords are responsible for maintaining a safe, habitable space. If a landlord isn’t addressing the issue, renters can document everything, notify in writing, and sometimes escalate through housing authorities or legal channels.

Not always. It depends on the extent of work. For large projects or for people who are very sensitive, temporary relocation may be recommended. Your remediation company will advise.