What to Do About a Flooded Crawlspace

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  • 3-6 hours
  • Beginner
  • $0-500
What You'll Need
Wet and dry vacuum cleaner
Water pump
Waterproof, outdoor radiant heaters

The crawlspace of the home is an often overlooked portion of the house that takes shape in two distinct ways. The first type is located within the home and represents space in and between the walls. The second type of crawlspace is usually located under the home and around the foundation. This space is filled with soil and usually covered with plastic to protect it from moisture, but when there is heavy rainfall, a crawlspace beneath the house can flood. This article will explain some ways for you to alleviate the problem.

Pump the Water Out of the Crawl Space

If you find yourself in a situation where water remains standing in a crawlspace, then you have to remove it before it begins to erode the foundation or soil. It is not practical to use the bucket brigade method to remove this water, and it is tough to broom the water out. Instead, you should utilize a pump.

Place the machine in a safe area. The pump usually has two hoses attached to it, so place the first hose inside the space, in the water, and then take the second outside, away from the house so the water doesn’t end up right back where it came from. Finally, turn the pump on and let it suck up with standing water beneath the house.

Wet and Dry Vacuum

If you have a crawlspace, then a wet and dry vacuum is a definite must-have piece of equipment. It will come in handy in more occasions than just a flooded crawl space.

If the water you are dealing with is minor then this solution will be your best bet. Plug the unit in, place the hose, and turn it on. The vacuum will suck up the water and place it inside the drum, which you can later dump outside.

Push Broom

Not every situation can be completely cleared with a vacuum since your hose may be too short. In those cases, use a push broom to move the water to the front of the crawlspace so that you can vacuum it.

Push brooms have a long handle which allows you to reach a distance greater than usual. All you have to do then is pull the broom forward and water will be brought with it. It is important to get as much water out of the crawlspace as possible prior to drying it.

Drying the Crawl Space


Because concrete is cooler than other materials, moisture can remain even after the standing water is gone. This moisture can cause mildew and mold to grow, so it’s important to dry the crawlspace out fast, rather than allowing it to sit and dry.

The best way to dry a crawlspace is to use a dehumidifier. Run an extension cord beneath your house, plug in the machine, and turn it on, leaving to run for a little while. Another option is to use waterproof and outdoor radiant heaters, which can burn off the moisture.