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The Why And How Mold Spreads

Mold is a problem that can affect every home. Because mold is present in the air, it takes very little for it to find a place to settle and grow. New Jersey is known for having wide temperature swings and a lot of humidity, both optimal conditions for mold.

corner where floor and wall meet covered in black mold
Mold Spreads From Floor to Walls

Many times, moisture accumulates in places we don’t notice or can’t see, like underneath flooring, behind wood trim and drywall. Kitchens and bathrooms are even more vulnerable with hidden plumbing behind cabinets and tile. Sometimes the first sign you'll notice is a damp, moldy smell in the air long before you ever see the mold itself.

The optimal conditions mold needs to grow and thrive are warm temperatures, dampness and little air movement. Food sources can range from paper and cardboard, wood and dust and dirt.


Warmer weather can instigate mold growth. Areas in your home that are allowed to surpass the 80-degree mark are the most susceptible. In the winter, check places where condensation collects, such as windows and doors. The heat from your home reacting to the cold outside will create moisture, especially if the area is not well insulated. If you have an older home, consider adding weather strips around drafty openings.

Air Circulation

Mold thrives in environments where there is little or no air movement. Vent fans and ceiling fans in bathrooms and strategically placed floor fans in basements or other places in your home where air can become stagnate are a helpful addition.


This is the most important condition you need to be concerned about. Mold needs moisture to grow. Without moisture in some form, mold will dry up and not spread.

Moisture can occur from any water source:

Leaks and drips from plumbing

Steam from showers and cooking

Rain accumulating in clogged gutters and under eaves

Groundwater seeping through cracks in your foundation

Poor insulation around windows and doors


Dirt can also attract moisture as well as be a food source for mold. Vacuum and dust at least once a week. Areas like attics and basements are harder to keep up with that, so going back to keeping those areas dry with some air movement should help with that.

Remember, mold is everywhere. Once it takes hold and starts to spread in your home it can become an expensive problem to treat. Keeping on top of issues before they arise will make your home less susceptible. If however, you need mold remediation, Dry Master Restorations is always available, and Here to Help… Anytime.


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