Can you smell mold in walls?

Asked by: Dr. Nora Schroeder DDS  |  Last update: January 17, 2023
Score: 4.9/5 (41 votes)

If you don't see signs of mold but you can smell it, it may be hidden in your walls. A musty smell is a good indicator that mold is growing in your home. The smell of mold feels earthy, like rotting leaves or decaying wood in a dense, damp forest.

How do you know if you have mold in your walls?

Five most common signs
  1. Odor – you smell something but just can't see anything.
  2. You don't feel good when your home and you feel better when your away.
  3. Constantly itchy nose, red eyes and sneezing.
  4. Staining on interior wall and base molding.
  5. Wall appears to be wet and damp.

What does house mold smell like?

Most people describe the smell of mold as musty, stale, and earthy — somewhat similar the odor of wet socks or decaying wood. Although mold smells can vary, here are some of the most common characteristics: Musty and Stale — like old socks or a stuffy attic that hasn't been aired out in months.

Can mold smell come through walls?

Assuming you aren't seeing any mold now, the smell could be coming from inside the wall cavities, perhaps within insulation stuffed into the walls, with the smells then wafting into the room through gaps around trim and between the walls and flooring.

Can you smell if a house has mold?

These compounds are known as microbial volatile organic compounds (mVOCs). Because mVOCs often have strong or unpleasant odors, they can be the source of the "moldy odor" or musty smell frequently associated with mold growth. A moldy odor suggests that mold is growing in the building and should be investigated.

9 Signs You Have Toxic Mold In Your Home

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How can you tell if you have mold behind drywall?

Visible Signs of Mold

Mold can have different colors and textures, so be sure to recognize them. Mold can be black, green, gray, white, or brown. Mold can even appear orange, pink or purple when it grows behind vinyl wallpaper. Another sign of visible mold is discoloration of walls, even if it has been painted over.

How can I test the air in my house for mold?

In order to test your air for mold, you'll need a viable mold test kit. These are widely available at any home improvement store and online at sites like Amazon and Home Depot. Once mold is determined, call a professional to do additional tests to see what type of mold is present and how to remove it.

What does toxic mold smell like?

Mold has a distinct smell. It's often described as musty and earthy, and may even smell like rotting vegetables or plants. You might notice a musty smell, but not be able to see any mold growing. In this case, you should look for areas that might be exposed to water.

What are signs of mold sickness?

What are the symptoms of mold exposure?
  • skin irritation.
  • sporotrichosis, a skin infection that starts out as a small pink, red, or purple bump on the skin.
  • itchy, red eyes.
  • runny or stuffy nose.
  • postnasal drip.
  • headache.
  • dizziness.
  • asthmatic symptoms, such as coughing, wheezing, shortness of breath, and tightness in the chest.

Why does my wall stink?

Mold or mildew in the walls is the most serious cause of musty smells in houses. If no cleaning methods work to remove the smell, this might be why.

Is there a mold detector?

To test for mold spores in the air you're breathing, you'll need to purchase a viable mold detection kit such as Seeml Labs' Mold Inspector in a Box. Most quality mold tests cost between $20 and $45. The entire testing process will take a few days.

Why does my room smell like mold?

Stagnant air — Stagnant air traps airborne particles like dust, mold spores, and even tobacco smoke from your clothes. This is especially true on hot humid days. If you don't have proper ventilation in your room, the air holds on to these pollutants.

Can you smell black mold in a house?

Most often, the first sign of black mold is to see or smell it. Mold will give off a musty smell or a smell associated with rotting vegetables, depending on the type of mold and what the mold is consuming. If you smell mold, but you can't see it, search for sources of water that may have infiltrated your home.

Can mold behind drywall affect you?

Drywall mold is considered potentially harmful as it can have a huge impact on your health and structural integrity of your property. Mold on drywall can grow and multiply rapidly if you do not act promptly or manage them properly.

How long does it take for mold to spread in walls?

mildew and mold will develop within 24-48 hours of water exposure. Even worse, it will continue to grow until steps are taken to eliminate the source of moisture, and effectively deal with the mold problem. Use the diagram on the facing page to assess the extent of mold in your home.

Does a musty smell always mean mold?

The musty smell that is harbored within your home's walls can be the cause of several factors residing in the environment and/or conditions that are present in the indoor space. Although most people's initial thought is that musty smells only come from mold development in the environment, this is simply not the case.

What does mold poisoning feel like?

Primarily, mold illness is associated with allergic reactions that mimic seasonal allergies. Respiratory symptoms such as wheezing, coughing, watery eyes, and skin irritation are the predominant symptoms.

How quickly can mold make you sick?

These symptoms usually first appear 2 to 9 hours after exposure and last for 1 to 3 days. Other affected persons have progressive shortness of breath and cough, as well as weight loss. Work-relatedness may only become apparent over long holidays if symptoms resolve and then recur on return to work.

Can mold grow in your lungs?

The mold spores can colonize (grow) inside lung cavities that developed as a result of chronic diseases, such tuberculosis, emphysema, or advanced sarcoidosis. The fibers of fungus might form a lump by combining with white blood cells and blood clots.

How do you know if your house is toxic?

Common Symptoms:
  1. Respiratory Symptoms – congestion, aggravated asthma or allergies, sinus infections.
  2. Cognitive Issues – foggy thinking, sleep disturbance, frequent headaches.
  3. Emotional Changes – feeling agitated or depressed.
  4. Physical Symptoms – stomach discomfort, muscle aches, fatigue, rashes, sore throat.

Do air purifiers help with mold?

Air purifiers help capture mold spores from the air, preventing them from reproducing and spreading throughout your home. While air purifiers won't help treat active mold that's already present on surfaces, they are a great way to control the spread of airborne mold particles.

Will a dehumidifier help with mold?

If the humidity in a room increases, mold will start growing in patches on walls, clothes, and more. So, to answer your question, dehumidifiers do NOT kill mold, but they do prevent it by reducing humidity. If you have a mold problem in your home, don't wait. Mold spreads as long as it has a water source.

Does mold smell go away?

A musty odor can be a telltale sign of a mold or moisture problem in a home. Perhaps in your own home, the odor was what prompted you to schedule a mold inspection! Once the mold is discovered and remediated, the odors will likely go away.

What happens if you breathe in black mold?

When people with allergies inhale mold spores, they can experience sneezing, runny nose, red and itchy eyes, headaches, skin rashes, throat and lung irritation, difficulty breathing, wheezing, shortness of breath, asthma attacks and more.

How do you get mildew smell out of walls?

In a large bucket, mix one part bleach to four parts water. Scrub the walls and floors with the homemade mildew killer you've concocted, being sure to sponge away all bleach residue once you've finished the job.