A musty smell in the house is annoying and sometimes difficult to explain: there is no visible mold or obvious mess, and yet a room doesn't smell fresh. The cause is usually a combination of moisture and insufficient air circulation. Here you can read where a musty smell comes from and how to get rid of it.
Where does a musty smell come from?
A musty smell almost always arises from moisture that remains trapped somewhere, often in places you don't see or air out daily. Common causes include:
- Insufficient ventilation, which causes moist air to linger instead of being removed
- Textiles, cardboard, or paper that have absorbed moisture, for example in a cupboard or storage area
- Early-stage mold growth in a place with little air circulation, such as behind a cabinet or in a corner
- High humidity in the home, which makes odors take longer to disappear
- Poorly ventilated spaces such as a basement, attic, or walk-in closet
Start with proper ventilation
The first and most important step is to let in enough fresh air. Open a window daily, even in rooms you use infrequently, and leave the doors of cupboards and storage spaces open occasionally so that the air inside can be refreshed.
Actively search for the source
A musty smell without an obvious cause often points to a damp spot you haven't found yet. Check behind cabinets, under sinks, in basements, and in attics. Feel textiles and cardboard: if they feel clammy or cold, they have likely absorbed moisture.
Lower the humidity structurally
Ventilating helps, but in many homes, the humidity remains too high even after that to truly get rid of a musty smell, especially in the autumn and winter. Our advice in that case is to use the Dynter AirPure DH251 dehumidifier: this device lowers the humidity structurally, which reduces the environment in which odors and mold can develop.
Address textiles and storage
Wash bedding, curtains, and clothing that smell musty, and let them dry thoroughly before storing them again. Preferably store textiles and paper in closed containers instead of open boxes, so that they absorb less moisture from the air and are less likely to start smelling musty.
When is it more than just an odor?
If the smell persists despite ventilating and dehumidifying, check extra carefully for visible mold or a hidden source of moisture, such as a small leak. A musty smell that doesn't go away is often a sign that there is more going on than just a lack of fresh air.