How To Prevent Mold After A Flood

Nick Durante
by Nick Durante
Credit: Shuttterstock / Tattoboo

The last thing any homeowner wants to deal with is the overwhelming effects of a flooded home. Not only does it cause extensive damage, but it can cause mold to grow and spread in your home. That’s why so many homeowners want to know how to prevent mold after a flood. 

The best way to prevent mold after a flood is to remove porous, wet items, and use dehumidifiers and fans to ventilate. Call a flood restoration company, as they may need to remove sections of your floors, walls and insulation. It’s also important to disinfect your walls and other surfaces, as bacteria can contribute to mold growth. 

Unfortunately, your homeowner insurance plan may not cover the cost of mold remediation after a flood. However, it’s still worth calling them, as they can refer you to a mold remediation or flood restoration company. Follow along as we highlight the best ways to prevent mold after a flood. 


7 Mold Prevention Tips After A Flood

1. Use Protective Equipment

You must protect yourself before you can protect your home from mold after a flood. Floods can stir up harmful bacteria and materials that are dangerous to inhale. Ideally, you should protect your lungs with an N-95 mask to avoid breathing in dangerous materials. 

It’s also a great idea to wear water-resistant boots and pants if you must wade through water. Rubber boots are particularly effective as they’re easy to clean afterwards. You must also wear gloves, as you’ll likely move many waterlogged items. 

It’s also worth wearing goggles to keep dirty water and bacteria out of your eyes. After all, you must work quickly and water will likely splash as you move your belongings. This also helps if you remove insulation, as small particles can get into your eyes. 


2. Remove Wet Items

Once the flooding is done, you must carefully assess the damage. Inspect your furniture and belongings in the affected areas to see what has been damaged. Pay particular attention to porous items likely to absorb lots of water.

This includes carpeting, upholstered furniture, insulation, and wooden objects. Depending on the extent of the damage, you may also want to inspect the ceiling panels. Porous items retain water, making them more susceptible to mold and mildew. 

You can place some of these items in a dry, warm area to help them dry out. However, deciding what’s worth keeping and what you should throw away is important. Mold can develop on wet surfaces in as little as 24 hours.


3. Quickly Dry The Area

Time is of the essence when it comes to mold prevention after a flood. You can’t rely on sunlight to dry your home out, so you must devise simple alternatives. For example, you can run a sump pump to drain the standing water in your home.

Running fans can also help some of the water evaporate and reduce the risk of mold. 


4. Ventilate The Space

Poorly ventilated spaces are a dream come true for mold and mildew. Failure to ventilate your home after a flood is a sure way to get a mold outbreak. Strategically place fans throughout the affected areas in your home.

In some cases, you may even need to put fans behind walls that suffered lots of flood damage. Many homeowners must remove sections of their walls that are too waterlogged. Even then, you must still place dehumidifiers behind or between walls to reduce further water damage. 

Whenever possible, it’s a great idea to open windows, especially if it’s warm outside. Keep in mind that you may want to set up mosquito netting so bugs don’t enter your home. However, you obviously shouldn’t open windows if rain is in the forecast. 


5. Use A Dehumidifier

Moisture can remain in your home even after drying and ventilating the flooded areas. As long as moisture remains, there’s still a chance of mold growing in your home. You can minimize this risk if you run a dehumidifier in the affected areas. 

Dehumidifiers draw moisture from the air until it condenses into water droplets. They collect the water droplets to protect the surrounding area. Ideally, you should run a dehumidifier for at least 48 hours after your home floods. 

Depending on the extent of the damage, you may even want to run two dehumidifiers. Strategically place your dehumidifiers in dry spots surrounding the flood damage. That way, they won't become damaged by the water and stop working. 


6. Disinfect The Area

The dirtier the surfaces are in your home, the more likely mold will grow. Floodwater can kick up lots of dirt, debris, and bacteria that contribute to mold. Some people mistakenly dry the surfaces in their homes without disinfecting, and mold still grows. 

Mix 1 cup of bleach with 1 gallon of water, soak a rag or sponge, and scrub hard surfaces in the affected areas. Be patient, as this can take a while if the flood damage is extensive. You can also wash appliances using the same process, but with 5 gallons of water to 1 cup of bleach. 

There’s also a strong chance that your walls got dirty during the flood. In that case, you must clean them with unscented soap and a wet/dry vacuum. However, you may have to replace your wallpaper or repaint your walls. 


7. Call A Restoration Company

You can only do so much to prevent mold after a flood if you aren’t an expert. Luckily, restoration companies have the equipment and knowledge needed to restore your home to its original state. Call your homeowner insurance and they can likely recommend a restoration company.

Keep in mind that flood coverage may not be included in your homeowner insurance plan. Flood insurance comes at an extra premium in most cases. Even with flood insurance, they may not cover the cost of damage if it’s deemed to be your fault.

For example, they may not cover damages if the flood is caused by a boiler or water heater you failed to repair. However, they should at least refer you to a local restoration company even if they can’t offer financial help. It’s still a great idea to do as much as you can to prevent mold before the restoration company arrives. 


How Quickly Can Mold Grow From Water Damage?

Mold can grow in 24 to 48 hours after your home suffers water damage from a flood. However, you won’t see the mold appear at first, which is why time is of the essence. Mold is sneaky, as spores are invisible as they travel through the air at first. 

You may not even see the mold form until up to 21 days after the initial water damage. That said, the mold will slowly form and spread starting a day or two after the flood. Once it is visible, the problem is much worse than it seems. 

Even cleaning the mold with rags and paper towels can make the problem worse. This can dislodge the mold spores, letting them travel through the air and spread. That’s why you must act fast after a flood and call a mold remediation company equipped to get rid of mold for good. 


Summing It Up

After a flood, you must gear up with an N-95 mask and gloves before you remove wet, porous items from the affected area. Dry wet surfaces by hand, set up fans, and run a dehumidifier to reduce the risk of mold after a flood. Carefully disinfect surfaces once they’re dry, and call a flood restoration company within 24 hours of the water damage. 


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Nick Durante
Nick Durante

Nick Durante is a professional writer with a primary focus on home improvement. When he is not writing about home improvement or taking on projects around the house, he likes to read and create art. He is always looking towards the newest trends in home improvement.

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