Superior Restoration of Murrieta Logo


24/7 Emergency Line

FAQ: What Causes White Mold in Crawl Spaces?


Crawl spaces and basements tend to have high humidity levels, making them susceptible to white mold growth. This type of mold can pose serious health risks, with studies linking it to 21% of asthma cases. In this article, you will understand more about the dangers of white mold in crawl spaces and how it can affect your property.

White Mold in Crawl Space: First, Let’s Find Out What White Mold Is

One type of fungus that you do not want your home to have is white mold. It comprises a wide variety of white-hued mold species. Its texture is soft and fuzzy or light powdery. Like other kinds of mold, white mold grows and flourishes because of excessive moisture due to inadequate dehumidification, plumbing leaks, or pouring rain. 

Most of the time, homeowners get confused if what they notice is white mold, mildew, or efflorescence. However, efflorescence and mildew often evolve into mold if not treated immediately. Generally, mildew grows outside of a house and on plants. The difference between mildew and mold is the odor – mold has a more dominant and noticeable smell.

Conversely, if the odor is not musty and the white substance appears on a stone surface rather than wood, it may be efflorescence – a deposit of minerals resulting from the moisture. You can remove efflorescence by spraying it with water as it dissolves in water.

White Mold in Crawl Space – A Serious Concern

White mold in crawl spaces is a serious concern for homeowners. Not only does it threaten the home’s structural integrity, but it can also cause health issues such as allergic reactions and watery eyes. Crawl spaces, typically damp and dark, provide an ideal environment for mold growth. The mold can spread to the floor joists, insulation, and other structural elements, causing damage that weakens the house’s foundation.

It is also important to note that while black mold is a well-known type, it’s not the only mold that can grow in crawl spaces. White mold is a common mold that can grow in crawl spaces and be just as dangerous as black mold.

If white mold is found in your crawl space, it is crucial to address the problem as soon as possible. You can use various methods to remove mold, including specialized cleaners and disinfectants, and in some cases, you may need professional mold removal services.

Signs and Causes of White Mold Growth

White mold grows in environments with excess moisture and high humidity levels. Leaks, poor ventilation, or a lack of a vapor barrier often cause dampness in a susceptible room. And if the crawl space is not correctly sealed, moisture can seep in from the soil, and the mold can start to grow.

The presence of white mold in crawl spaces can cause serious health problems. People exposed to mold can experience allergic reactions, and in severe cases, it can lead to respiratory problems and other serious health issues. It is essential to address any mold issue earliest to prevent further damage or health problems.

Detecting White Mold in Crawl Space

There are several ways to detect white mold in your home efficiently, including:

  1. Visually inspecting: White mold often has a white or gray appearance and can appear powdery. One can find it on walls, ceilings, floors, and other surfaces.
  1. Using a moisture meter: A moisture meter can detect high moisture levels in areas where mold is likely to grow. This tool can help you identify areas of the home at risk for mold growth and help you take steps to prevent mold from developing.
  1. Conducting a smell test: White mold has a musty odor, so if you notice a strong, musty smell in a room or area of your home, it could be a sign of mold growth.
  1. Checking for water damage: White mold often grows in areas damaged by water, such as in the aftermath of a flood or leak. Look for discoloration, stains, or warping on walls, floors, and ceilings.
  1. Hiring a professional inspector: An experienced inspector can thoroughly inspect your home and detect the presence of white mold. They have the proper tools and expertise to identify mold growth in hard-to-reach areas and can recommend appropriate removal ways. 

Preventing White Mold in Crawl Space

There are several steps that you can take to prevent white mold in crawl spaces, including:

  1. Installing a vapor barrier: A vapor barrier is a material placed on the ground in the crawl space to prevent moisture from seeping into the area. It can be a critical step in preventing mold growth, as mold thrives in environments with excess moisture.
  1. Sealing floor joists and other structural elements: Floor joists are the beams that support the home floor, and they can be a common area where mold grows. To prevent mold growth in this area, it is essential to seal any gaps or cracks in the floor joists with tape lifts or other sealants.
  1. Eliminating exposed soil: Soil can contain high moisture levels, contributing to mold growth. Stop any exposed soil in the crawl space and ensure the area is well-ventilated.
  1. Maintaining proper humidity levels: High humidity levels can contribute to mold growth. Utilize a dehumidifier to keep humidity levels in the crawl space below 50%.
  1. Scheduling regular inspections: Regular inspections can help identify potential mold growth before it becomes a problem. Schedule a free crawl space inspection to identify any potential issues and take steps to correct them.
  1. Addressing leaks or water damage immediately: Leaks or water damage can create the perfect environment for mold growth. Be sure to address any leaks or water damage as soon as they are discovered to prevent mold growth.
  1. Hiring a professional mold removal company: If white mold in crawl space is present, it is vital to hire a professional mold removal company to eradicate it. They have the necessary equipment and expertise to remove mold safely and effectively.

Have a Professional Come and Check

If you sense that you may have a white mold in crawl space, it is essential to schedule a free crawl space inspection as soon as possible. If mold is already present, removing mold spores and hiring a professional like Superior Restoration is crucial.

Superior Restoration of Murrieta is a company that specializes in solving water and mold damage issues. We have a crew of highly skilled and equipped professionals who can handle any water damage, whether it’s from a flood, leaky pipe, or other sources. Our specialists use state-of-the-art equipment and techniques to ensure they can do the job right the first time.

We also offer 24/7 emergency services to ensure your property is protected and restored as soon as possible. With Superior Restoration, you can be confident that our company will take care of your water damage quickly and professionally.


CALL US 24/7