The short answer
Check Humidity and Airflow
High humidity alone can make a condo feel musty, especially if the air doesn't move. Bathrooms without exhaust fans, closets with no ventilation, and tightly sealed windows can trap moisture from cooking, showers, and even breathing. Over time, that moisture settles into fabrics, drywall, and wood.
A simple hydrometer can tell you if indoor humidity stays above 60 percent. If it does, you may need to run a dehumidifier or improve airflow with fans. Opening windows when weather allows and using exhaust fans while cooking or showering can also help reduce the musty smell.
- Run the bathroom exhaust fan during and after showers
- Use a kitchen vent while cooking on the stove
- Open windows for a few minutes each day, if possible
- Keep closet doors open to let air circulate
- Consider a portable dehumidifier in damp areas
Inspect for Leaks and Mold
If you don't find obvious dampness, the smell might come from mold growing in a hidden place. Mold can develop behind drywall, under flooring, or inside ductwork. It often appears as black or green spots, but it can also be hidden and only reveal itself through the odor.
Look for signs of past leaks, such as warped wood, peeling paint, or bubbling drywall. If you find mold, avoid disturbing it, as that can release spores into the air. See a doctor if you feel unwell from the smell, and consider having a mold professional assess the situation.
Consider a Professional Moisture Check
When you can't find the source, it's time to call in the pros. A water damage inspection can detect moisture behind walls and under floors using specialized tools. This is especially useful in a condo, where the problem might be in a shared wall or a neighbor's unit.
The pros can also map moisture levels to identify the exact area of concern. That information helps you decide what to fix, whether it's a small pipe leak or a larger issue. If you live in Layton, keep a list of local water damage pros handy for quick reference.
Drying Out the Condo
Once the moisture source is found and fixed, the next step is drying the affected materials. Structural drying and dehumidification can remove trapped moisture from drywall, wood, and insulation. This process may involve air movers, dehumidifiers, and sometimes opening up walls to allow air to reach wet cavities.
Drying takes time, and the extent depends on how long materials stayed wet. In some cases, wet drywall or flooring may need to be removed and replaced. A local water damage pro can assess what's salvageable and what needs to go.
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Call Now (801) 383-0232Frequently asked questions
Can a musty smell in a condo be from a neighbor?
Yes, in attached condos, moisture can travel through shared walls or floors. A leak or high humidity in a neighbor's unit can cause a musty smell in yours. If you suspect this, talk to your neighbor or building manager, and consider a moisture inspection to pinpoint the source.
Is a musty smell always mold?
Not always. A musty odor can come from damp materials, like wet drywall or carpet, even before mold grows. However, mold often follows if moisture isn't addressed. If you see mold or feel unwell, see a doctor and have a mold professional assess the situation.
How long does it take to get rid of a musty smell?
It depends on the cause and how quickly you address it. If it's just high humidity, improving airflow and using a dehumidifier can help within days. If there's hidden water damage, drying or removing materials may take weeks. Acting quickly can prevent the smell from getting worse.