The short answer
Find the Source
Mildew smell comes from moisture, so the first step is locating where the dampness is coming from. Check common spots like under sinks, around windows, or behind appliances. A musty odor often means there is active mold growing somewhere.
Look for visible signs like dark spots, discoloration, or water stains. If you cannot find the source, it could be inside walls, under flooring, or in the HVAC system. In that case, a moisture mapping service can help pinpoint hidden damp areas.
- Check under sinks and around pipes
- Inspect window frames and door seals
- Look in closets and corners
- Feel walls for dampness
- Check the attic and crawl spaces
Dry the Area
Once you find the moisture, dry the area completely. Use fans, open windows, or run a dehumidifier to pull moisture from the air. In humid climates, drying can take longer, so be patient.
Remove any wet materials like carpets, padding, or drywall that cannot be dried quickly. These items can harbor mold and continue to produce the smell. If the area is large or the water damage is extensive, structural drying and dehumidification may be needed.
Clean the Surfaces
After drying, clean all affected surfaces. A solution of white vinegar and water works for many non-porous surfaces. For porous materials like wood or fabric, use an enzyme cleaner designed to break down mold and mildew at the source.
Scrub gently with a brush or cloth, then rinse with clean water. Let everything air dry completely. Avoid using bleach on porous surfaces, as it can leave residue and may not penetrate deep enough to kill the mold roots.
- Mix one part vinegar with three parts water
- Apply with a spray bottle or cloth
- Let it sit for a few minutes before scrubbing
- Rinse with water and dry thoroughly
- For fabric, wash with hot water and dry in sunlight
Use Odor Absorbers
After cleaning, you can use odor absorbers to tackle lingering smells. Baking soda is a simple option: sprinkle it on carpets or upholstery, let it sit overnight, then vacuum. Activated charcoal bags work well in closed spaces like closets or storage areas.
Commercial odor neutralizers are also available, but choose one that targets mildew, not just fragrances. Keep the area ventilated while using these products. Remember, odor absorbers only mask the smell if the source is still present, so ensure the area is dry and clean first.
When to Call the Pros
If the mildew smell persists after your efforts, the mold may be deeply embedded in building materials. Hidden moisture can lead to health issues and structural damage. In such cases, professional water damage inspection can identify the extent of the problem.
Local water damage pros have specialized equipment to detect moisture and dry structures thoroughly. They can also remove and replace affected materials like drywall or flooring. Policies vary, and your insurer decides what is covered.
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Call Now (214) 730-5993Frequently asked questions
Why does my house smell like mildew even after cleaning?
The smell usually means moisture is still present somewhere. It could be behind walls, under floors, or in the HVAC system. Cleaning the surface removes visible mold, but if the source is not dried, the smell returns. Check for hidden leaks or high humidity.
Can I use bleach to remove mildew smell?
Bleach can clean non-porous surfaces, but it may not penetrate porous materials like wood or drywall, leaving mold roots behind. It also does not neutralize odors well. Vinegar or enzyme cleaners are often more effective for both cleaning and odor removal.
How long does it take to get rid of mildew smell?
It depends on the extent of the moisture and the materials affected. Small areas may dry and clean in a few days with good ventilation and a dehumidifier. Larger issues, like soaked drywall or carpets, may take longer and might require professional drying equipment.