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Fire & Water - Cleanup & Restoration

How Come the Mold Came Back?

4/12/2022 (Permalink)

Mold on wall under a window A common place for mold colonies to form on a wall is below a window.

Fix the Moisture Source to Prevent Mold from Returning

Many homeowners tell us that they removed the mold from their bathroom walls, but it returned several days later. They ask why? Our response is based upon the science of drying and years of experience concerning working in damp or wet structures to perform mold remediation. Here’s our answer, “Mold requires moisture to grow. There are always mold spores in the air in both the outdoors and within our indoor environments. When a surface becomes damp and when the relative humidity of the indoor air reaches 60% or higher, mold will grow.”

Why Does Mold Return to the Same Location?

This is another common question and there is a logical reason why mold first grew on a certain location and why it returns to that location even after being removed. It’s because the conditions were ideal for mold growth in the first place. The air-movement in the room carried mold spores to a certain location where the texture, temperature, and moisture conditions were perfect for a mold colony to develop, These locations are often found on outside facing walls and usually above or below windows. Bathrooms and kitchens produce steam and are the usual rooms in which mold can become a problem. 

It’s easy to remove mold patches, but if the moisture conditions are not corrected, new airborne mold spores will settle in the exact locations. There are ways to prevent this cycle from repeating:

  • Ventilate kitchens, bathrooms, and bedrooms so moisture doesn’t exceed 60% RH.
  • Use dehumidifiers and HVAC system as necessary
  • Install and use powerful exhaust fans in kitchens and bathrooms
  • Be sure that exterior walls are properly insulated
  • Inspect for exterior leaks, including pipe leaks that could dampen a wall
  • Maintain indoor temperature so condensation doesn’t collect on exterior walls

SERVPRO of Yuma East, Foothills has observed that most interior mold is caused by lack of ventilation. That means opening doors, and window to ventilate and operating exhaust fans in damp rooms to prevent mold growth.  Anytime you need advice about a mold problem or require mold remediation, we are here to help. Our experienced team can be reached at: 928-247-1180

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