Why Does My House Smell Musty? | Causes and Removal | Aire Serv (2024)

Why Does My House Smell Musty? | Causes and Removal | Aire Serv (1)

Indoor air quality counts for a lot. When there’s no fresh air circulating, musty smells become inevitable. This isn’t an issue reserved for older homes – even brand-new ones can smell musty if there’s an abundance of pet odors, mold, mildew, or cigarette smoke. If you have a musty smell in your house, there are a few ways to combat it.

What Does Musty Smell Like?

If you’ve ever been in an old attic that hasn’t been cleaned or aired out in a while, you’ve experienced a musty scent. Some people describe it as smelling like old socks. Others describe it as a sour or earthy odor. It’s a very distinctive scent that most people immediately recognize. Even if you’re unsure exactly what a musty smell in your house is like, you’ve probably experienced the smell at some point in your life.

In some cases, musty smells stem from mold growth. Such an odor can be a red flag that something is wrong and needs to be addressed. If you’re unsure if your home has mold, a musty odor is a good indicator that it may indeed be an issue.

Why Does My House Smell Musty? | Causes and Removal | Aire Serv (2)

Musty Smell Sources

Why does my house smell musty, you may ask? There may be several contributing factors. For starters, homes with a lot of humidity may begin to smell bad. A damp odor may stem from mold and mildew buildup in a bathroom, attic, basem*nt, or laundry room. These are typically places without a lot of ventilation and where moisture buildup is more common. As water droplets seep into the floors, walls, and ceilings, mold and mildew begin to grow. They release foul-smelling gas, which can permeate carpeting, drapes, and other upholstery.

Sources of excessive humidity that cause mildew and mold may include a leaky roof, leaky air conditioner, damp fabrics, poor ventilation, water leaks behind walls, cracked foundations, and water damage. While the mold smell in the house won’t immediately cause harm, long-term mold exposure can lead to headaches, dizziness, nausea, fatigue, itchy skin or eyes, and nasal congestion.

How to Get Rid of Musty House Smells

If you’re hoping to eliminate mildew smells in the house, open some windows and circulate fresh air through the space. A dehumidifier can help remove excess moisture from specific areas. Keep a fan circulating, too. Dust, mop, and vacuum the floors regularly, then deep clean the bathroom, washing machine, and dishwasher occasionally. You can also invest in houseplants to help naturally clean the air.

Sometimes, a deep cleaning isn’t enough to completely eliminate mold and mildew smells. If foul odors persist, you may want to have a professional perform an indoor air quality test. A professional will also know what to look for and can identify signs of a more serious mold issue. Mold can lurk in surprising spots, so it’s important to have a potential problem checked out by an expert.

Test Your Home’s Air Quality

The best way to measure the effectiveness of your musty smell remediation efforts is to test the air quality in your home. Tests can identify contaminants like radon and formaldehyde, particulates like dust and pollen, and even VOCs (volatile organic compounds). All these can be harmful to your health, so if you suspect you have air quality issues, it’s important to act fast.

Although air quality testing strips can reveal a lot about what is floating invisibly through your air, a test conducted by a professional will give you a more accurate and comprehensive reading of your indoor air quality. Aire Serv professionals can perform this testing, change air filters and clean your air ducts to ensure the quality of your air remains good. You don’t have to live in a house that smells musty when you have professionals who can help remedy the problem!

Get Your HVAC Thoroughly Cleaned, Inspected, and Replaced

A musty smell in your house can be annoying and downright dangerous for you and your family. The good news is that you don’t have to just accept the foul odors. A call to your local Aire Serv team will help you understand what’s causing the musty odor and how to eliminate it. There’s no one size fits all approach to addressing musty smells, which is why calling for help is so important. If your initial efforts to remove the odor haven't worked, schedule an appointment online with Aire Serv today.

Why Does My House Smell Musty? | Causes and Removal | Aire Serv (2024)

FAQs

Why Does My House Smell Musty? | Causes and Removal | Aire Serv? ›

Clean the air ducts: It's possible the ductwork in your older home has never been cleaned. Professional air duct cleaning is an effective way to eliminate odors that manifest when you turn on the furnace or air conditioner. Update the HVAC system: Air duct cleaning isn't always enough.

Who to call if your house smells musty? ›

Who to call for a strange odor in your home depends on the smell, but home inspectors are a great place to start. They're especially helpful if you don't know the source of the smell and can't narrow it down on your own. A home inspector has expertise in the most common home issues.

Why does my house all of a sudden smell musty? ›

The most common cause of a sudden musty smell in a house, especially in winter, is the development of mold and mildew, often caused by humid conditions and condensation.

How do I find where the musty smell is coming from in my house? ›

Around windows where condensation could gather. Behind or under any storage areas that do not get a lot of traffic. Other places you should check for mildew, mold, or moisture are in your air conditioning and heating ducts, inside and around your washer and dryer, and in the walls and ceiling around your home.

Does musty smell always mean mold? ›

Excess Humidity

Humidity in the air is often the cause of mold, but it can also cause a strong smell even if no mold has formed. Dehumidifiers fix this issue, as does proper ventilation.

Why does my house smell musty but I cant find mold? ›

Check humidity: Musty odors can often be due to excess moisture. Use dehumidifiers to reduce humidity, especially in rooms such as the bathroom, basem*nt or other damp areas. Cleaning: Thorough cleaning is crucial.

What kills musty smell? ›

Good ol' baking soda. It's odorless, but absorbs odors really well, which makes it the perfect deodorizer for problem spots (here's looking at you, Fido and Fluffy). Simply sprinkle it on your carpet and let it sit an hour before vacuuming it up to help neutralize odors embedded in your carpet.

What to do if you smell mold but can't find it? ›

Call for professional help: If you are unable to find the source of the mold smell or suspect a more severe mold infestation, it may be time to call a mold remediation specialist. These professionals can conduct mold testing, identify the source of the mold, and safely remove it from your home.

What would a musty smell indicate? ›

A musty smell is almost always an indicator of unmanaged moisture. This moisture could either be liquid water or vapor. Unmanaged moisture often presents as mold or mildew.

Should you buy a house that smells musty? ›

Mildew and mold smells indicate a much larger problem -- mold removal can cost thousands of dollars, plus whatever's letting moisture in will need to be fixed. If you notice a strong smell but are interested in the house, hire an inspector who will pay special attention to unmasking the foul odor.

Can mold smell go through walls? ›

While you might not see mold, its presence might still be noticeable due to a distinct odor. Mold growth behind walls often produces a musty smell that seems to permeate throughout the room or even the entire home.

Why can I smell damp but not see it? ›

What's causing a damp smell in the house if there's no sign of damp? An old leak or flood. You might have fixed an old leak, or cleaned up after a flood, but it takes time for your home to completely dry out. There could be some remaining damp within the wood, bricks, or plaster – hidden behind dry walls and floors.

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