Where Does Mold Hide?

Mold is extremely good at hiding. It can be in your shower, in the crawlspace, or even hiding inside walls. Black mold exposure and mold poisoning can cause many different health issues, and it impacts everyone differently. Some symptoms of mold exposure may be simply a nuisance, and others may be more serious. If you can smell a musty smell or have had a leak recently, chances are you have an issue that needs to be addressed.

What Is Black Mold?

Black mold is a variety of mold known as Stachybotrys. While it is typically dark black, it can also present as green or gray. It typically has a distinctive, musty odor. This variety of mold produces a toxin called mycotoxin, and can lead to a number of symptoms. If you are exposed to mold in your home, you may experience:

• Headaches
• Fatigue
• Fever
• Eye Irritation
• Sneezing
• Rashes
• Coughing
• and more

Mycotoxins can affect everyone. Even healthy people with no allergies. To learn more about mycotoxins and how they affect people, check out our post: When Mold Is Worse Than Allergies.

Where to Look: Finding Black Mold In Your Home

1) Crawlspace

Crawlspaces are one of the most common areas we find mold, especially here in Georgia. Dirt floors act as a wick and draw ground moisture into the crawlspace. Your house then draws this moist crawlspace air into your living spaces through HVAC systems and unsealed gaps. Most vapor barriers we see are torn and have large holes, rendering them ineffective in keeping out the ground moisture. You can tell if you have mold in your crawlspace by pulling back the insulation in several spots and looking at the floor joists.

While you can clean a moldy crawl space, the problem will return if the humidity level is not corrected. While expensive, the #1 solution is to fully encapsulate and condition the crawlspace. If you need a more economical solution, you can repair your vapor barrier, and add a few circulation fans that operate a few hours a day on timers. Anything that will keep the stale air moving will help.

Last, check to be sure water is draining away from your house when it rains, and you do not have any plumbing leaks that are sending water to the crawlspace.

2) Bathrooms

The moisture levels in a bathroom make it an ideal place for black mold to grow. 

Check your shower heads and curtains. Look inside the cabinets and behind the toilet. If you see mold here, you know that the room is staying a little too moist. The good news about bathrooms is that most issues can be addressed with a good cleaning. Stay away from bleach, and use a dish detergent solution or hydrogen peroxide to clean and kill any visible mold. Check out our post A Simple Guide to Cleaning Mold to learn more.

Once the mold has been removed, the next step to prevention is to control moisture in the room. Running the exhaust fan each time you take a shower is a simple step that can make a big difference. See our post Preventing Bathroom Mold to learn even more.

3) Air Conditioner

Your air conditioner has two jobs: to control the temperature, and to dry the air. We find time and time again that HVAC systems are not properly drying the air, and produce moisture levels high enough to allow mold growth. Start by identifying where your air ducts are located. If they are in the floor, you have a crawlspace system, and you should pay extra attention to it.

Start by removing a vent cover and looking inside with a flashlight. Do you see dust and debris? If so, there is a good chance mold is growing here as well. Inspect the vent cover closely, and try to identify if there are any mold spores growing on it.

Last, head down to your crawlspace and look for any ducts that have fallen or come loose. We often find old HVAC ducts with gaps in the crawlspace, allowing that musty air directly into the home.

If you do suspect mold is in your HVAC system, it’s a good idea to call out the pros. Our Indoor Air Quality Assessments include a thorough evaluation of HVAC systems and ductwork. We can determine if the system is drying air properly, and if the ducts are in good shape. You can vacuum out the dust and clean vent covers yourself, but a professional duct cleaning will be necessary to clean the entire system.

4) Doors & Windows

Doors and windows are prone to leaks and could be allowing water into your home. These leaks are generally small and slowly let water in over time. If mold is growing inside the wall or under the floor around a door or window, it can be hard to identify without removing material. Look for anything out of the ordinary that may indicate a water leak is going on. Discoloration of the wood or drywall around the window is a good clue you may have a problem.

5) Inside Walls & Under Floors

Slow water leaks can go undetected for long periods of time and lead to damage far from the original source. If you have ever had a roof or plumbing leak, there is a possibility mold is growing somewhere inside your home. Finding it takes a thorough investigation and comprehensive evaluation of your home. An experienced mold inspector can put together the clues, and often arrive at a conclusion without tearing into the walls.

If you have ever had a water leak, or if you have any reason to suspect mold is hiding in your home, an Indoor Air Quality Inspection is the best way to find it.

Black Mold Prevention

The best way to prevent black mold is by controlling the moisture in your home. If you have a water leak or flooding, correcting the source of the water is essential prior to investing in mold remediation. If your mold issues are in bathrooms or basements, exhaust fans can be effective ways to control humidity.

Keeping the humidity level inside your home down will help you stay on top of any mold issues, especially here in the south. While they are not corrective solutions, dehumidifiers can do a great job of getting control of mold. Running your air conditioner during the warm seasons will help keep the air dry and humidity down as well. To learn more about what type of dehumidifier is right for your home check out our post: How to Choose Between Freestanding and Built-in Basement Dehumidifiers.

Last, regular cleaning, especially in areas like the bathroom and basement, along with a regular home maintenance schedule will help keep mold spores from ever being able to grow in your home.

We’re Here When You Need Us

Call Branch Environmental. We’re experts not only at mold removal, but at determining and remediating the underlying causes. From hidden mold sources to major contaminants. We can identify exactly what is going on in your home and rid it of environmental toxins, often for good.

Branch Environmental – Because nobody should live or work in a building that makes them sick.

For more information go to:

1. Facts about Stachybotrys chartarum (aka “black mold”) – CDC
2. When Mold Is Worse Than Allergies – Branch Environmental
3. How to Keep Mold Out of Your HVAC system – Branch Environmental
4. How To Seal Floor Vents and Improve Indoor Air Quality – Branch Environmental
5. Top 6 Types of Water Damage and How to Avoid Them – Branch Environmental
6. A Simple Guide To Cleaning Mold – Branch Environmental
7. How to Prevent Bathroom Mold – Branch Environmental
8. How To Seal Floor Vents and Improve Indoor Air Quality – Branch Environmental
9. 12 Facts about Duct Cleaning – How to Avoid Scams – Branch Environmental
10. 3 Reasons You May Need A Mold Inspection– Branch Environmental
11. How to Choose Between Freestanding and Built-in Basement Dehumidifiers – Branch Environmental
12. Top 10 Ways to Prevent Water Damage – Branch Environmental

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