Rainstorms And Mold Growth.

Rainstorms don’t just produce flooded streets and hazardous driving conditions. They also provide a breeding ground for mold spores. Mold spores travel through the air and attach themselves to wet or damp surfaces, which they thrive on. Rainy weather creates a very habitable and prosperous environment for these spores to grow. Even after the rain subsides, these spores can then travel and attach themselves to other surfaces, such as damp and dark places inside your home. drainage-problem1

The main things mold needs to grow in a home are organic materials to feed on and moisture. In houses there are always plenty of organic materials for mold to live on such as wood, drywall and various other building materials. Most molds need 24-48 hours of moisture to begin to grow. Therefore if a suitable material in your home is wet for more than 24 hours then you run the risk of mold starting to grow.

Under optimal conditions, a single mold spore can germinate and produce a fungal colony with hundreds of thousands of spores in 4-9 days. To grow and thrive a fungus requires organic matter and water. The organic matter can be almost any carbon-containing material, such as plant matter, cotton, wood, hemp, wool, leather, soil, house dust, or paints. Water can be in the form of standing water, condensation, dampness, or high humidity.


Mold growth is inevitable after rainstorms, however, there are ways to prevent it from spreading and allowing it to turn into a harmful and hazardous problem.

  • One is water leaks. These include things such as leaking roofs or walls, leaking pipes and leaking taps or a leaking shower. If you know of any leaks in your home you should fix them without delay. You might need to inspect your home to find any water leaks you didn’t know about.
  • Condensation is another frequent cause of moisture. One way to reduce condensation is to keep the temperature warmer in rooms. You can also insulate the surfaces themselves such as putting coverings over metal pipes. You’ll also have less condensation occurring if you keep the humidity in your home low.
  • The best way to keep humidity low in your home is through ventilation. Open the windows during the day, especially when it’s hot since this is when humidity is usually the lowest outside. Close your windows when it’s raining outside though. Air conditioners can also reduce household humidity, as can using dehumidifiers in your home.
  • One common cause of moisture problems in homes is wet clothes. After you’ve washed your clothes you should immediately dry them. Don’t leave them sitting in a wet pile for a long time. Make sure not to leave any wet clothes lying around waiting to be washed too.
  • Mold loves dark spaces indoors to grow in. Allowing sunlight in will reduce the chances of mold growing so open the curtains in rooms during the day to let natural light in.
  • To minimize mold spores clean and dust often. Also vacuum your home regularly, preferably with a HEPA vacuum cleaner to remove mold spores. HEPA air filters in your home also help remove mold spores from the air.

Once mold has begun to grow in your home it’s not enough to just take away the mold’s moisture source. Mold that runs out of moisture can lie dormant for a long time without dying. So if you already have mold growth in your home you need to take steps to have it removed. The best thing you can do is contact a mold remediation company or water damage specialist who performs clean ups of mold or water damage. This way you can be sure that all mold problems will be properly taken care of. You will also have the peace of mind of knowing that your home will be completely safe to continue living in after it’s been professionally remediated.



“How To prevent mold” Web blog post. Mold in House. Black Mold Award Space. 8 July 2016

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