Why does my basement smell?

Mold and mildew growth occurs where there is dense or substantial humidity. Moisture accumulates in basements when there is an avenue for it to enter. Common reasons why basements smell musty include: Cracks and gaps in the walls or floor.

How do you get rid of basement smells?

Tackle the Smell

Place bowls of baking soda around the basement. The baking soda will begin to absorb the odors and should make a significant difference over the course of a few days. You can also use bowls of white vinegar or clean cat litter—both will absorb odors as well.

What is that smell in my basement?

Generally, if we are talking about a smell in your basement, it isn't a pretty one. What you smell may be mold, mildew, cat urine (or feces), dead mice, or sewer gas. If you have an older home, there's a good chance you battle with moisture in your basement, which leads to some of these problem smells.

Is it normal for a basement to smell?

Since the basement is below ground level, this moisture never really goes away and just keeps accumulating. This causes mold and fungus to grow and spread. If the moisture in your basement is not eliminated, you will start to notice a musty smell.

Can a basement smell musty without mold?

The musty smell that is harbored within your home's walls can be the cause of several factors residing in the environment and/or conditions that are present in the indoor space. Although most people's initial thought is that musty smells only come from mold development in the environment, this is simply not the case.

Will a dehumidifier get rid of basement smell?

The best way to remove moisture from a damp basement is to keep a dehumidifier down there. A single dehumidifier in the basement will remove quite a bit of the dampness and lessen the smell.

Why does my unfinished basement smell?

Underground living spaces can't hold moisture like the upper levels of your home. When the warmer air from above seeps into your basement, the moisture in the air condenses, and ends up on your dark basement walls and cold water pipes. Mold begins to form, and the unpleasant smell you can't seem to shake is born.

How do you get rid of sewer smell in basement?

Simply pour a few gallons of water to re-establish the proper water barrier. You can add a small amount of vinegar to help remove any persistent odors. If you don't use basement toilets often, the water from the P-trap can evaporate just like with floor drains. Give the toilet a flush or two to remedy the problem.

Why does basement smell like rotten eggs?

That “rotten egg” smell in the basement is sewer gas, or hydrogen sulfide. It comes from decaying organic matter like sewage in your plumbing lines, according to The Scottish Plumber on Angie's List.

What does a damp basement smell like?

A: That unpleasant, musty smell—some people describe it as akin to a wet dog—in is the calling card of mold and/or mildew. The spores of these ubiquitous fungi drift through the air until they find the damp, dark, and warm environment that allow them to multiply and thrive—conditions common to basements.

Why does my basement smell like sour milk?

A sour and stale smell can be the result of stagnant air, especially probable after closing up a house for a season, with minimal air circulation and no fresh air added to the room. Throwing open the windows and turning on a fan helps to improve the air.

How do you test for mold in the basement?

Most mold is unmistakable, but sometimes small or largely hidden growths just make a surface look dirty. A quick test for mold can be done when you dip a swab in diluted bleach (1 part bleach, 16 parts water) and dab it on the wall. If the spot quickly lightens (or keeps coming back after cleaning), assume it's mold.

Why am I getting sewer smell in my basement?

The most common cause of sewer gas odors in a basement will be due to your home being equipped with a large basement floor drain. This drain runs deep into your sewer line, and can give off foul sewer gas odors when: There is damage present in the drain line. The drain line is clogged, or needs cleaning.

How do I get the rotten egg smell out of my basement?

If the dry trap is to blame, the fix is simple: Just turn on the faucet a few seconds and let the water drain out. The water will fill the trap and effectively block sewer gases. If the smell is strongest in your basement, the floor drain trap may have dried out.

Why do I smell septic in my basement?

When we experience a foul sewer smell in the basement, the large drain in the basement is usually where it is coming from. The drain may be clogged, but something simple like a dried-out water seal in a basement floor drain could also be the culprit. Other times a sewer odor is a sign of a bigger problem.

Why does my basement smell like a fart?

When the seal in the floor drain pipe drys out it releases sewer gas. The smell that is released is similar to poop or rotten eggs. The smell can move up through the basement and into your home. It's important that the issue is addressed immediately.

Why does my house smell like a sewer?

If you are detecting foul sewer odors inside the house, this means that there is a weak link somewhere in your plumbing system. Possible sources include bathroom sink drains, toilets, kitchen drains, basement drains, old cast iron piping, or even the vent stack that goes out through your roof.

How do I clean the air in my basement?

How to Improve Basement Air Quality

1. Clean the Air. The most simple way for how to improve basement air quality is by cleaning the air. ...
2. Dry it Out. ...
3. Ventilate. ...
4. Keep Windows Closed. ...
5. Seal Up Cracks and Gaps. ...
6. Remove High VOC Contributors. ...
7. Use Low-VOC Paint. ...
8. Test for Radon.

How do I circulate the air in my basement?

Placing a fan in front of a window and pointing it so that the indoor air is pushed outdoors. If you have a second window or door in the basement, you can crack it slightly to further improve ventilation. Installing an exhaust fan with a ventilation pipe.

Does musty smell always mean mold?

Find the source of the musty smell:

And because the microbial volatile organic compounds (MVOCs) emitted from mold and mildew have a low odor threshold, a musty smell does not necessarily mean that there is a lot of it. Before you try to cover up the odor, take some time to look around for patches of mildew or mold.

Why does my basement suddenly smell musty?

The old musty basement smell that most people are familiar with is typically caused by mold and mildew. As these fungi grow, they release foul-smelling gases that permeate the room and embed themselves in fabric such as carpet, curtains, clothing stored in the basement, or even upholstered furniture.

How long does it take for a dehumidifier to stop smelling?

Improper storage can cause biological growth inside the unit that creates a musty smell. This is often due to storing the dehumidifier with water still inside. To properly store your dehumidifier, turn it off and wait 24 hours; then empty the tank.

Can I pour bleach down my basement drain?

Bleach and cleaning fluids create toxic gasses when mixed together. If you pour bleach and other cleaning agents down your sink drains, and they mix in your pipes, you can contaminate the air in your home with the resulting gas created. The following items should never be poured down the sink with bleach: Vinegar.

Will a dehumidifier help with mold?

Reduce Mold and Mildew

A dehumidifier is designed to reduce the moisture level in the air by extracting the excess water. By doing so, dehumidifiers can help prevent the growth of mold and mildew and improves the indoor air quality of your space.

What are signs of mold in your house?

Signs Your Home May Have a Mold Problem

• Rotten Smell. Is there a damp, musty odor reminiscent of the smell of old books emanating from your floors or walls? ...
• Spotted Clothing. ...
• Contaminated Carpets. ...
• Water Heater Hideaway. ...
• Allergy or Asthma Flare-Ups. ...
• Fungus in the Furniture. ...
• Warped Walls. ...
• Persistent Cough or Cold.