How to Get Mold Smell Out of a House for Good

The smell comes from mold or mildew growing somewhere in your home. It could be behind drywall, under flooring, in the HVAC system, or around a leaking pipe. If you can smell it but cannot see it, the source is likely hidden in a wall, ceiling, or subfloor.

Start by checking damp areas like bathrooms and kitchens. Look for water stains, discoloration, or a musty odor near windows, doors, and vents. If the smell is strong, a water damage inspection can help locate hidden moisture. In humid climates, moisture can sneak in after heavy rains or storms.

Once dry, clean all affected surfaces. Use a mild detergent and water for non-porous surfaces, then apply a mold-killing solution. Do not mix bleach with other cleaners, as it can create dangerous fumes. Always wear gloves and a mask to avoid inhaling spores.

For porous materials that cannot be cleaned, such as drywall or wood, removal is safer than trying to scrub away the mold. If the mold has spread extensively, a mold professional can assess the situation. After cleaning, dry the area again to prevent regrowth.

Wear gloves, goggles, and an N95 mask

Use a HEPA vacuum to remove loose spores

Clean with detergent, then a disinfectant

Rinse and dry thoroughly

Discard porous items that cannot be cleaned

Some mold problems are too large for a homeowner to handle safely. If the mold covers more than a small area, or if you have health concerns like asthma or allergies, bring in a mold professional. They have the equipment and experience to remove mold safely.

The pros can also handle water-damaged materials like drywall, flooring, and subfloors. If the smell persists after cleaning, hidden mold may be in the structure. A water damage inspection can identify the extent of the problem. Act quickly to prevent further damage.

Large mold patches (over 10 square feet)

Mold in HVAC ducts or behind walls

Signs of structural damage from water

Health symptoms like coughing or headaches

Recurring mold after cleaning