The short answer
What Causes That Musty Smell
Mildew and mold release compounds that smell musty and earthy. These organisms need moisture to grow, so the smell is a clue that water is getting into your basement. It could be from a slow pipe leak, groundwater seeping through cracks, or condensation on cold surfaces.
High humidity inside the basement can also be the culprit, especially in warmer months. Poor airflow lets damp air sit still, which encourages mold on walls, floors, and stored belongings. Even a small spill or wet cardboard box can start the problem.
How to Find the Moisture Source
Start by looking for visible signs of water: damp spots on walls or floors, water stains, peeling paint, or rust on metal fixtures. Check around windows, pipes, and where the floor meets the wall. A musty smell often hides the exact spot, so use your nose and a flashlight.
If you cannot find a clear leak, consider that moisture might come from the ground below. Concrete floors and walls can wick water upward. You can test by taping a plastic sheet to a section of wall for a few days; if moisture forms underneath, that is the source.
- Check for dripping pipes or visible leaks
- Inspect window wells and frames for gaps
- Look for white or gray stains on concrete, which can indicate water seepage
- Feel walls and floors for dampness, especially after rain
- Notice if the smell gets stronger in certain corners
Dry the Basement Thoroughly
Once you stop the water source, you need to dry everything out. Remove wet items like boxes, furniture, or carpet. Use fans and a dehumidifier to lower humidity and keep air moving. Open windows if the outside air is drier than inside.
If the space is very damp or water has soaked into walls or flooring, the drying process can take time. Professional structural drying may be needed to reach moisture trapped deep in materials. Local water damage pros can use specialized equipment to dry the area properly.
Clean Up Mold Safely
For small patches of mold on hard surfaces, you can scrub with a detergent solution and water. Wear gloves, goggles, and a mask to avoid breathing in spores. Do not use bleach on porous materials, as it may not remove the roots and can release fumes.
If mold covers a large area or has spread into drywall, insulation, or wood, that material often needs to be removed. Trying to clean heavily contaminated items can spread spores. A mold professional can assess the extent and recommend the right approach for your home.
- Wear protective gear when cleaning mold
- Keep the area ventilated while working
- Discard porous items that are heavily moldy
- Dry cleaned surfaces completely to prevent regrowth
- Consider professional help for large areas
Prevent Future Mildew Smells
After your basement is dry and clean, take steps to keep moisture out. Fix any leaks promptly, improve drainage around your home, and seal cracks in the foundation. Use a dehumidifier during humid months and ensure the space has good air circulation.
Keep stored items off the floor and away from walls. Use plastic bins instead of cardboard boxes. Check the basement regularly for dampness or new stains. If you live in Rogers, keep a written record of any past leaks to help you notice patterns.
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Phones are answered 24/7 for Rogers and nearby communities.
Call Now (479) 370-1500Frequently asked questions
Is a mildew smell dangerous?
Mold can trigger allergies or breathing problems, especially for sensitive people. If you feel unwell, see a doctor. The smell itself is not toxic, but the mold behind it can be. Address the moisture source to prevent health issues.
Can I just paint over the mold smell?
Painting over mold does not kill it and the smell often returns. You must clean the mold and fix the moisture problem first. If the mold has soaked into drywall or wood, that material may need replacement before any painting.
How long does it take to get rid of the smell?
It depends on how wet the basement is and how much mold exists. After you dry the space and clean the mold, the smell usually fades within days. If moisture is trapped in walls or floors, it can take longer and may need professional drying.