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Winter Mold Awareness: Why Mold Grows Faster in December

Winter in Nevada and Placer County means colder nights, more rain, and damp conditions, exactly the type of environment where mold thrives. Many homeowners don’t realize that mold growth is most common during the winter months, not summer. With homes sealed up tight, moisture trapped inside, and limited airflow, mold can spread quickly.

At Cecil Construction Inc. (CCI), we specialize in mold testing, inspections, and full remediation to keep your home safe, healthy, and protected through the wet season. Here’s what homeowners should know as we head into winter and how to spot mold before it becomes a bigger problem.

Why Mold Grows More in Winter

Mold needs two things: moisture and organic material. Winter provides both, often in hidden ways.

Common winter sources of mold:

  • Roof leaks from past storms or early winter rain
  • Condensation on windows, walls, or in attics
  • Poor ventilation from keeping homes sealed tight
  • Unnoticed plumbing leaks behind walls

With lower airflow in winter, moisture has fewer places to escape, meaning mold can grow in as little as 24–48 hours.

Signs You May Need Mold Testing

You don’t have to see mold for it to be a problem. Some of the earliest signs include:

  • Musty or earthy odors
  • Increased allergies or coughing indoors
  • Excess condensation on windows
  • Discoloration or staining on walls and ceilings
  • Warped or soft drywall
  • Visible fuzz or dark spotting in corners, vents, or bathrooms

If you’ve had recent water damage, a plumbing leak, or roof issues, mold testing is strongly recommended for allergy sensitive individuals.

How CCI Performs Professional Mold Testing

  1. Full Visual Inspection

We start by inspecting high-risk areas including attics, crawl spaces, bathrooms, basements, behind appliances, and areas with previous leaks.

  1. Moisture Mapping

If signs of water damage are detected, we use moisture meters and thermal imaging to help locate and map trapped moisture that could lead to mold growth.

  1. Air Quality Testing

We take indoor air samples to measure mold spores in the air. These are compared to an outdoor baseline sample to determine if your home has elevated interior levels.

  1. Lab Analysis

All samples are sent to an accredited laboratory for detailed analysis with results typically in 3 to 5 business days.

Results typically highlight:

  • Mold type(s) present
  • Spore concentration
  • Whether the levels pose a health risk
  • Next steps for remediation
  1. Results Review + Custom Remediation Plan

We walk you through your report in plain language, explaining what it means, where the mold is coming from, and the best plan to remove it safely.

CCI also offers full mold remediation, including removal, cleaning, restoration, and repairs, so the job is truly complete from start to finish.

Schedule Professional Mold Testing with CCI

Cecil Construction Inc. proudly serves Nevada and Placer County with reliable, certified mold testing, mold remediation, and full-service restoration.

If you’ve noticed moisture, leaks, strange smells, or just want peace of mind, CCI is here to help.

Call today to schedule mold testing: (530) 274-1516
Local. Trusted. Experienced.