Common Types of Household Mold in Tennessee, Kentucky, and Alabama

Mold isn’t just an ugly stain on your walls or ceilings — it’s a health hazard that can quietly spread behind surfaces and affect the air you breathe. For homeowners in Tennessee, Kentucky, and Alabama, the warm climate and frequent humidity create ideal conditions for mold to thrive.

Below are the five most common mold types found in homes across the region, how to recognize them, and why it’s important to address them quickly.

5 Common Types of Mold

1. Cladosporium

Cladosporium is one of the most widespread indoor molds. It grows on wood, carpets, fabrics, and inside HVAC vents. Unlike some molds, it thrives in both warm and cool conditions. Exposure often triggers allergic reactions such as sneezing, coughing, and eye irritation.

2. Penicillium

Penicillium appears as blue, green, or yellow fuzzy patches on water-damaged walls, insulation, or furniture. Its lightweight spores travel easily through the air and may cause sinus infections, breathing problems, and chronic inflammation in mold-sensitive individuals.

3. Aspergillus

Common in dust, air conditioning systems, and old building materials, Aspergillus includes many strains — some harmless, others capable of producing dangerous mycotoxins. People with asthma or weakened immune systems are especially at risk when exposed to toxic varieties.

4. Stachybotrys chartarum (Black Mold)

Known as “toxic black mold,” Stachybotrys thrives in areas with excessive moisture — such as after flooding, leaks, or chronic humidity problems. It produces mycotoxins linked to fatigue, headaches, memory issues, and serious respiratory symptoms. This is one of the most urgent molds to remediate.

5. Alternaria

Alternaria is often found in bathrooms, kitchens, under sinks, and near leaky windows. It spreads quickly in damp, dark areas and is a major trigger for asthma flare-ups and chronic allergy symptoms if not removed promptly.

Why Mold Can Come Back

Even after cleanup, mold can return if the underlying issue — moisture or poor ventilation — isn’t fully fixed. Hidden leaks, lingering humidity, or damp materials can allow mold to regrow behind walls or under flooring.

That’s why post-remediation mold inspections are so important. With the help of a detection dog like Ace, homeowners can confirm whether remediation was truly effective before walls are closed up or renovations begin.

Protect Your Home and Health

Mold problems don’t resolve on their own — and the longer they remain hidden, the greater the risk to your health and your property. Whether you’re dealing with a current issue or want peace of mind after remediation, canine mold detection offers unmatched accuracy.