Many environmental factors can lead to a sudden growth of fungal colonies. In most artificial environments, such as a building, temperature and humidity are the deciding factors. Molds have a comparable range of comfort to humans when it comes to temperature.
Mold and Cold
Only a very small number of molds that can grow below 39 degrees Fahrenheit, and this is one of the reasons why we refrigerate our perishable food like fruits, vegetables and meat.
Most rotting food is merely the result of molds eating the food before we do, and so having some readily available form of nutrition can be a deciding factor for mold growth.
Mold and Moisture
Indeed, the most important step one can take to reduce the presence of mold in your home or office is to reduce the level of humidity.
It is necessary to first identify the source of moisture, whether it is a shower or humidifier, or even a window that was left open (this is particularly true if you live in region that is naturally very humid). Many times a bathroom fan can eliminate extra humidity during a shower, and so can cracking a nearby window in the bathroom.
Mold Hates the Sun
Once the source of moisture has been eliminated, one can assess other causes that may facilitate the growth of mold. Areas that receive little or no sunlight are also prone to mold growth, and so it is recommended that one take steps to allow sunlight into the affected area more regularly if possible.
If this is not possible, one can use a work lamp or even a CFL bulb to emulate the sun’s UV rays in that specific environment. If the room appears cool, it is recommended to increase the temperature closer to the ambient temperature of your home as this will help prevent mold growth.