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7 Common Signs of Mold in Your Crawl Space


A typical crawl space under a home with mold growing on the walls

Homes built on a crawl space foundation are prevalent throughout Florida and Georgia — especially in neighborhoods with homes built before the 1970s. With the high humidity and moisture content in these areas, it’s not uncommon for crawl spaces to develop mold. Even though you can’t see it, this mold can be hazardous to your health.

Fortunately, you can minimize this health risk by looking for some common clues that mold is present. We’ve listed seven signs that you may have mold in your crawl space. We’ll also tell you the best way to keep your home’s foundation mold-free.

What Causes Mold to Develop in a Crawl Space?

Before reviewing the signs of mold growth, it’s helpful to understand why mold develops in some crawl spaces but not others. In a nutshell, mold growth tends to occur in crawl spaces that are overly humid or damp. Mold is also likely to grow in crawl spaces that lack waterproofing and those built on yards that have not been properly graded. These conditions allow moisture to enter the crawl space, setting the stage for mold and mildew.

What are the Most Common Signs of Mold in your Crawl Space?

The path to a mold-free crawl space begins with knowledge. As a homeowner, you can learn to recognize the warning signs that mold is present. Here are some of the most common signs that mold is lurking in your crawl space.

1) A Musty Odor

Moisture buildup can cause the wood and structural material inside your crawl space to rot and decay. The result is an unpleasant musty smell that can permeate your crawl space as well as your home’s ground floor.

2) Warped or Sagging Floors

Standing water, mold, and mildew can make the floors in your home sag, bend, or bounce. This is often because moisture damages the wood beams that support your ground floor. As a result, your floor becomes prone to damage.

3) Increased Bugs and Pests

Bugs and pests are common in Georgia and Florida. But if you suddenly notice more pests invading your home than usual, they could be entering through a crack or hole in your crawl space. If pests can enter your home, then rainwater and runoff may enter through the same location. The result is moisture buildup and mold.

4) Discoloration on Walls and Insulation

When mold begins to take over your crawl space, it can leave an unattractive mark on your walls and insulation. Have you seen any greenish or blackish stains on the surfaces in your crawl space? If so, it’s a good idea to have your home’s foundation inspected right away.

5) Worsening Allergy Symptoms

Florida residents are accustomed to a long allergy season. However, if you notice your eyes are more watery than usual or that you are sneezing and coughing more often, your symptoms could be the result of mold growth under your home.

6) Powdery Patches on your Floor Joists or Posts

Mold growth does not always look like a black or dark green stain. Sometimes it is lighter in color and can have a powdery appearance. If you have noticed any dirty or dusty-looking patches on the frame, posts, or joists of your crawl space, you could have a mold problem.

7) Decaying Beams and Joints

An overabundance of moisture can eventually cause your beams and other structural supports to erode. If you notice your wooden beams are starting to rot or take on a curved appearance, then mold is likely a culprit. It’s wise to have your home evaluated immediately by a foundation repair specialist to prevent additional damage to your home.

What Should You Do if You Suspect There is Mold in Your Crawl Space?

If you notice one or more of the symptoms above, then you and your loved ones could be exposed to harmful mold. While this may seem scary at first, it’s important to know that mold can be removed and prevented. However, unless you are a skilled mold removal professional, it’s best to entrust this process to a trained mold remediation specialist.

If you suspect you have a moldy crawl space, the best thing to do is to contact the experts at Alpha Foundations. Since 2002, our team has delivered five-star crawl space repair services to Florida and Southern Georgia residents. Scheduling a free appointment with our team is easy. Within a matter of minutes, you can rest assured that your home’s foundation will soon be mold-free.

What is the Surest Way to Prevent Future Mold Growth in Your Crawl Space?

Once the mold and mildew have been safely removed, the next step is to prevent mold from surfacing again in the future. The Alpha Foundations team can help you prevent mold as well. The process is as easy as 1-2-3:

  • Step One: REPAIR. Mold can damage your crawl space and foundation. Alpha Foundations offers a comprehensive package of crawl space repair services that includes structural repair, treatment of cracks, and efficient drainage solutions.
  • Step Two: RESTORE. With your structural repairs completed, Alpha Foundations can install a crawl space dehumidifier to transform your crawl space from a muggy moisture trap to a cleaner, drier environment where mold is less likely to develop.
  • Step Three: PROTECT. To safeguard against future mold growth, Alpha Foundations offers professional crawl space encapsulation services. Our CleanSpace® encapsulation solution effectively seals your crawl space. The benefits of encapsulation include improved air quality, lower energy bills, and increased comfort. Additionally, the CleanSpace® solution prevents pests from entering your home or destroying your foundation.

To discover why residents across Florida and South Georgia trust Alpha Foundations to keep their crawl spaces mold-free, we invite you to visit our photo gallery to see our results for yourself. Our products and services are fully warrantied, and our stellar reviews are a testament to our commitment to providing the highest quality service. We look forward to helping you keep your home’s foundation safe and healthy!

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