How do I find the source of a musty smell in my house?

Author: Enrico Pfeffer  |  Last update: Thursday, May 22, 2025

How to find the source of musty smells
  1. Look under all of your sinks for leaks or water build-up that may have caused mold or mildew growth and scrub these areas with mild bleach or vinegar solutions. ...
  2. Examine your showers for mold or mildew. ...
  3. Clean your garbage disposal and scrub your dishwasher filter.

How to figure out where a musty smell is coming from?

To check your bedrooms for mould, look for visible signs on the walls, in corners, and behind furniture. Also try checking your dirty laundry, looking for leaks around the ceiling, pipes, and radiators, and for damp patches on your soft furnishings.

How do you pinpoint a musty smell?

One thing you can try is cupping your hands around electrical outlets on exterior walls and sniffing in them. You might be able to pin down the general location of the odor. You can also sniff near the corners of the window trim to try to locate the odor source.

How do I find out what causes a musty smell in my house?

Check for Moisture: Look for any signs of water damage or leaks in bathrooms, kitchens, or around windows. Damp areas can lead to musty odors. Inspect Air Vents and Filters: Dirty air filters or mold in ductwork can contribute to musty smells.

Why does my house smell musty but I can't find mold?

Why does my apartment smell musty even though there is no visible mold? Musty odors can be caused by hidden sources of moisture such as leaking pipes, condensation or poorly ventilated areas.

Helpful Ways to Identify Odors Inside Your Home

What might a musty smell indicate the presence of?

The top causes of musty odors in bathrooms are from fungal growth. Mold and mildew are types of fungus found in damp spaces, like bathrooms. The constant presence of moisture in bathrooms creates an environment where fungus can thrive.

Does a musty smell automatically mean mold?

General dampness, repeated condensation, and high humidity can sometimes bring on a musty smell. Since dampness can also facilitate mold growth it's likely that mold is beginning to form once you start noticing a musty smell.

How to detect where a smell is coming from?

If odors seem to be emanating from this part of your home, check the following locations:
  1. Trash Cans. Under counter trash cans are a frequent source of odors. ...
  2. Ovens. Baked-on foods in your oven can cause burning or smoking odors when your oven is in use. ...
  3. Cooktops and Hoods. ...
  4. Disposals. ...
  5. Dishwashers. ...
  6. Refrigerators. ...
  7. Cabinets.

Where does musty smell come from?

A musty smell is almost always an indicator of unmanaged moisture. This moisture could either be liquid water or vapor. Unmanaged moisture often presents as mold or mildew. If unmanaged moisture reaches the point of smelling musty, it has likely reached the stage of mold or mildew.

What absorbs musty smells?

Baking soda and vinegar are often regarded as some of the best natural cleaning ingredients given their inherent deodorizing properties. When using these ingredients to remove the smell of must, simply place a bowl of either baking soda or vinegar in the affected room overnight to absorb the musty odors.

What is the best musty odor eliminator?

11 Best Odor Eliminators of 2024, Tested and Reviewed by Cleaning Experts
  • Best Overall. Clorox Disinfecting Mist. Read more.
  • Best Value. Febreze Odor-Fighting Air Freshener. Read more.
  • Best for Bathroom Odors. Poo-Pourri Before-You-Go Toilet Spray. Read more.

How to identify the source of mold?

Mold can grow anywhere there is adequate moisture or a water problem. The best way to find mold is to look for signs of mold growth, water staining, warping, or to follow your nose to the source of the odor. It may be necessary to look behind and underneath surfaces, such as carpets, wallpaper, cabinets, and walls.

Why have I started smelling musty?

Serious liver disease can make breath smell musty or like garlic and rotten eggs. Compounds that are transported through the blood can also be released through your sweat glands. That can make your armpits and skin smell bad. It's normal for stress to cause smelly compounds to be released through your sweat.

What does hidden mold smell like?

Mold, when it flourishes indoors, exudes an odor. Experts liken the smell of mold to a forest lush with earthy vegetation, soil and decaying wood. Others connect the scent of dirt lying beneath decayed leaves with the smell of mold. More homely descriptions suggest mold smells like wet, dirty socks.

Why do I smell a musty smell but no one else does?

Or it could be an odor that isn't actually present (known as phantosmia). Your symptoms suggest you have periods of phantosmia: your brain registers an odor when none is present in the environment. But at other times, it could be parosmia, meaning you are more sensitive to a smell that doesn't bother other people.

Who to call for musty smell in house?

Problem: Musty or moldy smells typically indicate mold or mildew growth. Who to Call for Solution: Seek a professional mold remediation service. They are experts in identifying, removing, and preventing mold in homes.

How do I find where the musty smell is coming from in my house?

Check under and in the refrigerator and small appliances that use water, like coffee makers and tea kettles. Be sure to also check the trashcan, as mildew could be growing under the disposable trash bag liner. In the bedroom and living areas, look around window seals for leaks and under potted plants that can leak.

Can musty smell be something other than mold?

Summary. You might be dealing with plumbing leaks, water damage in hidden spots, or washing machine drain issues if your house smells musty but no mold is visibly present. The first thing to do is identify the source of the smell before attempting to eliminate the unwanted odor.

Is it bad to breathe in musty smell?

A moldy odor suggests that mold is growing in the building and should be investigated. The health effects of inhaling mVOCs are largely unknown, although exposure to mVOCs has been linked to symptoms such as headaches, nasal irritation, dizziness, fatigue, and nausea.

How to locate the source of a bad smell?

Places to Check for Bad Odors in Your Home
  1. Plumbing. A sewage smell in a house that comes and goes or is persistent could be caused by blockages in your plumbing. ...
  2. Soft Materials. Carpets, curtains and upholstery can absorb odor-causing compounds from cooking foods, mold and bacteria from humans and pets. ...
  3. Vents. ...
  4. Trash.

Is there such a thing as an odor detector?

Odor sensors have been extensively used to detect gas leakage and in fields such as healthcare, mobility, and spatial environment control, in which the detection of low-concentration biogas and odor is crucial [3].

Why does my room smell musty?

Damp, mould and mildew are the most common causes of a musty or stale smell in houses, creating this smell by emitting gases known as microbial volatile organic compounds (MVOCs) as they grow.

What if I can smell mold but can't find it?

If you weren't able to identify where the moldy smell is coming from, the mold might be growing in hidden areas like ducts, air vents, HVAC, attics, or walls. Check humid and damp areas in your home where mold might be hiding. If these methods fail, consult a professional to inspect your home for mold contamination.

How to find the source of mold in a home?

Most often, a mold problem will be readily identified by a musty smell that becomes obvious in damp environments. Mold also likes to play hide and seek, so if you suspect there is a problem, then check under carpets, behind drywall, inside ductwork, in between bathroom tiles and in other moisture-prone areas.

Why can I smell damp but not see it?

With prolonged condensation dampness, mould spores can thrive and permeate into walls, carpets, furniture and other soft furnishings. In some cases, the actual mould growth and source of the musty smell may be hidden from view perhaps behind a wardrobe or in a cupboard.

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