What Causes Mold Indoors?

3 Primary Causes Mold Indoors

1. Moisture: Is Trapped and Is Never Properly Dried

What causes mold indoors to start? There must be a source of water or moisture (which could even be trapped humidity), getting a substance or material wet that is capable of sustaining mold growth. Common building materials, such as wood, drywall, insulation, carpets and carpet padding are the most common building materials where we find mold damage.  In carpet, after a single incident of water damage occurs in a building, getting the carpet & pad dry are not the only concern, as most people assume.

Water many times is trapped behind baseboards, and if not pulled, can become a big breeding ground for mold.  The biggest concern is the unseen damage from water…trapped moisture!  Even if you have a water on the surface, large amounts of humidity can cause all suitable material in an area to become a breeding ground for mold.  Getting air movement under the carpet & behind walls is of the greatest importance.  Placement of adequate dehumidifiers to properly remove the moisture from the air and materials is essential for maintaining a healthy mold free environment.  Moisture causes mold indoors to grow inside of the walls and then becomes inactive until a later incident of high humidity; this illustrates how mold can seem to be a sudden problem, long after a previous flood or water incidents that did not produce such a problem. The right conditions reactivate mold.


2. Materials: That Can Absorb Moisture Get Wet

Many of our building materials are porous and absorb moisture easily. Materials that are commonly used as a mold food source is wood, drywall, and common building materials. Because these materials retain moisture, this is what creates a food source when humidity is introduced and is the beginning of what causes mold indoors. Mold spores are ubiquitous, mold growth in an indoor environment is typically related to water or moisture indoors. Mold growth may also be caused by incomplete drying of flooring materials such as concrete.  Flooding, leaky roofs, building maintenance problems, or indoor plumbing problems can lead to mold growth inside homes, schools, or office buildings.

3. Time: Begins Growing in as Little as 24 Hours

The last element of what causes mold to grow is time. Mold growth begins between twenty-four and seventy-two hours from time of exposure. Mold that is not rectified only continues to grow at a rapid rate. In our experience, we have seen small areas less than a foot in diameter grow rapidly. Only in a matter of a couple of months, that same one-foot area grew at an alarming rate. Becoming over fifteen-foot in diameter and needing extensive remediation. Mold that is caused by water damage quickly becomes a breeding ground for more dangerous mold types such as black mold.

causes mold to grow

Please follow and like us: