What Can Contribute to Mold Growth in Winter?

What Can Contribute to Mold Growth in Winter?

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Eliminating Moisture is the Key!

We tend to close up our homes once it starts getting colder; and with all of the latest energy efficiencies we have today, our homes become too tightly sealed. This can trap moisture and raise humidity levels.
  • Turning up our thermostats creates warmer air that is often unable to escape; and if your home’s indoor environment is too tightly insulated, the likelihood of mold or mildew growth in winter months dramatically climbs. Additionally, warm condensation and trapped moisture from humidity levels tends to dwell in homes for longer periods of time.
  • The fall and winter outdoor environment provides the ability for mold spore activity to be higher. Mold’s job in nature is to break down dead plant matter. When leaves fall and plants die, the decaying plant matter releases mold spores in the air.
  • if you recently replaced your old furnace with an energy efficient furnace it is important to have a professional consultant from Got Mold? out to check and make sure your mechanical systems are properly ventilating

Common Indoor Spaces for Mold Growth in Winter

Mold growth in winter and fall seasons can be commonly found on the exterior of drywall, sheet rock and other surfaces of rooms located in ceilings and corners of the home. Due to corner rooms being exposed to significantly colder air than their adjoining rooms, they have higher relative humidity levels (RH). However, the adjoining rooms have the same water vapor pressure – ultimately creating conditions that can be favorable to sustain mold growth in winter.
If you see mold growth in winter months on a corner room, another common area is a closet in your home or areas behind dressers and where beds are tightly pushed up against the cold wall not allowing humidity to escape, it can mean the RH of the next room’s surfaces is 70% or higher. On the other hand, if the temperature in the room is too cold, or there is a lot of moisture (high water vapor levels), the room may also have RH levels over 70%. Both the relative humidity and the temperature of the rooms’ surfaces and areas need to be balanced – neither too moist, nor too cool.

Tips to Prevent Mold Growth in Winter:

  1. Keep indoor humidity below 60%. Ideally, it should be between 35% and 45%.
  2. Placing a dehumidifier in the room can lower moisture enough to prevent mold growth.
  3. Set ceiling fans in reverse.
  4. Duct-work and filters should be kept clean.
  5. Do not allow water to stand in condensate pans.
  6. HRV Heating and recirculating unit
But, most importantly call Got Mold? to schedule an appointment to perform a professional evaluation of the mechanical systems.

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About got mold?™

got mold?™ is a locally owned and operated Canadian company with over 25 years of combined experience in the disaster restoration industry. A Message from the President Mold is a growing concern. To continue to thrive as a business over the next ten years and beyond, we must look far ahead, understand the ever changing world and power in order to structure our business in the future and maneuver in such a way that will allow us to anticipate challenges we face throughout our journey, enabling us to continue operating as a world class company employing great people for continued success. Our Mission Find & fix sources of unhealthy indoor air Our Vision Healthy indoor air Our Core Values Dependable - We make commitments and meet them Resourceful - We find a way or make one Knowledgeable - We are certified and constantly learning Productive - We get it done right ASAP Trustworthy - We have a great reputation Loyal - We are proud of our company and its values Ethical - We don’t compromise our values and we don’t cut corners Respectful - We care about people, property and good stewardship of money All this while maintaining the utmost in health & safety standards. Indoor air quality specialists, we are experts in mold testing, removal and remediation; fire and flood damage restoration; indoor air quality testing; asbestos surveying, asbestos testing, sampling and abatement.