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Mold Testing Services

Category Press Release
Publish Date 12/31/2025
Author Paul Cochrane
Title Moisture and Mold in Cold Climates: How Winter Conditions Can Trigger Hidden Microbial Growth
Introduction EMSL Analytical provides laboratory testing services, sampling supplies, and building inspection tools to identify mold, moisture, and other environmental issues in the built environment.

Cinnaminson, New Jersey, December 31, 2025

As temperatures drop, property owners and facility managers are being reminded that cold weather often brings an increased risk of moisture and mold problems indoors. While in some areas, winter typically signals a drier season, condensation, inadequate insulation, ventilation issues, and burst pipes can all create ideal conditions for microbial growth, even when outdoor temperatures are below freezing.

When warm, humid indoor air meets cold surfaces like windows, walls, or poorly insulated areas, condensation can occur. Over time, this moisture can support the growth of mold and bacteria, especially in hidden areas.

Common winter moisture sources include:

  • Condensation: Resulting from temperature differentials between indoor air and cold building materials.
  • Poor insulation: Allowing cold spots and dew point formation on walls or ceilings.
  • Inadequate ventilation: Trapping humidity from daily activities like cooking, bathing, or drying clothes indoors.
  • Burst or leaking pipes: Water intrusion from frozen or damaged plumbing that often goes unnoticed until mold has already begun to grow.


“Indoor mold can impact structural materials and degrade indoor air quality,” said Joe Frasca, Senior Vice President of Marketing at EMSL Analytical, Inc. “Certain types of molds may also produce allergens, irritants, or even mycotoxins that can affect sensitive individuals. This is why preventing moisture accumulation during the winter months is essential for maintaining a healthy indoor environment. When a problem is suspected, professional testing can identify mold species and determine the extent of contamination.”

To help in this effort, EMSL Analytical offers a comprehensive suite of laboratory services and sampling supplies for mold and other microbial contaminants. The company operates accredited laboratories across North America, providing rapid turnaround times and expert consultation to environmental professionals, building managers, and homeowners.

For more information about EMSL’s indoor environmental quality (IEQ) testing services and resources, please visit www.EMSL.com, call (800) 220-3675, or email info@EMSL.com. To access IEQ test kits, visit www.EMSLTestKits.com.


About EMSL Analytical, Inc.

EMSL Analytical is one of the leading testing laboratories with locations throughout the United States and Canada. EMSL is a nationally recognized and locally focused provider specializing in fast laboratory results for mold, bacteria, Legionella, USP <797>, pathogens, asbestos, lead, soot, char & ash from fires, VOCs, odors, radon, formaldehyde, indoor air quality, microbiology, environmental, industrial hygiene, radiological, food, beverage & consumer products, and material testing services for the identification of unknown substances. EMSL services both professionals and the general public. EMSL maintains an extensive list of accreditations from leading organizations as well as state and federal regulating bodies including, but not limited to A2LA, AIHA LAP, LLC. (AIHA EMLAP, AIHA IHLAP, AIHA ELLAP), NVLAP, CDC ELITE, CPSC, CA ELAP, NY ELAP, TX DOH, NJDEP and multiple other state accrediting agencies. Please visit our website at www.EMSL.com for a complete listing of accreditations. In addition, EMSL carries a wide range of Sampling Equipment and Investigative Products for environmental professionals.



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