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How to Prevent Crawl Space Flooding

crawl space flooding
crawl space flooding
ByMariel McClung
Table of Contents

Are you concerned about potential crawl space flooding in your home? Protection from costly and potentially disastrous crawl space flooding doesn’t have to be complicated. With the right preventative measures, you can protect your home’s foundation and keep moisture away for good. In this blog post, we’ll review the causes of crawl space flooding, what to do if your crawl space has already flooded, and how to help prevent a flooded crawl space.

What Causes Crawl Space Flooding?

Various things, including the following, can cause crawl space flooding:

What Causes Crawl Space Flooding

  • Poor drainage around the foundation – If the area surrounding the house doesn’t have good drainage, water can accumulate and seep into the crawl space, especially during heavy rainfall. This can also happen if the gutters and downspouts are clogged or malfunctioning.
  • High water table – A high water table means the groundwater is too close to the surface and can easily seep into the crawl space through the dirt floor. This usually happens in low-lying areas.
  • Broken or leaking pipes – Leaking or broken pipes in the crawl space can cause water to accumulate and eventually flood the area.
  • Natural disasters – Hurricanes, flash floods, and heavy rainstorms can all cause crawl space flooding.

My Crawl Space Has Flooded. What Should I Do?

If your crawl space has flooded, here’s what you need to do:

  1. First things first, cut the power supply to your home. Electrical wiring exposed to water poses a severe electrocution threat; hence, safety should always be your top priority. Once you’ve done that, you can start with the cleanup process.
  2. Depending on the severity of the flooding, you may need to use a sump pump or a wet/dry vacuum to extract the water. Once most of the standing water has been removed, use fans and dehumidifiers to dry the area. Make sure you keep an eye out for mold growth as well. Mold can spread quickly, so if you notice any, contact professionals to remove it.
  3. It’s also essential to find the cause of the flooding, so once the area is dry, inspect the space for any cracks or gaps where water could seep in.

A flooded crawl space can cause significant damage if not tackled immediately. Always remember to prioritize safety, remove the water, assess the cause of flooding, and dry the area as soon as possible. If you’re unsure or unable to do so, contact professional services for help.

How To Help Prevent Crawl Space Flooding

Fortunately, there are some things you can do that will help prevent your home’s crawl space from flooding. These include the following:

  • If necessary, regrade your yard – The yard around your house should slope away from the foundation. If it slopes towards the foundation, it can cause water to accumulate around the foundation, leading to crawl space flooding. Poor grading can also cause water to infiltrate through the walls, compromising the foundation.
  • Use downspout extensions – Downspouts are designed to channel rainwater from the roof away from the house and into a designated area. When downspouts are short or not extended far enough away from the home, rainwater can accumulate near the foundation and get into the crawl space. Installing downspout extensions can divert the water away from the foundation.
  • Clean gutters regularly – Clogged gutters can cause rainwater to overflow and spill onto the ground near your foundation, increasing the risk of saturated soil and crawl space flooding. Clean your gutters at least twice a year to prevent clogs and ensure rainwater flows through them properly.
  • Install a drain tile system – A drain tile system involves installing a perforated drainage pipe around the perimeter of your foundation at the footing level. This pipe collects groundwater and directs it away from the foundation, keeping the soil around it from becoming too saturated. A drain tile system is a more involved process than some other preventative measures, but it can be especially helpful for homes in areas with high rainfall or a high water table.
  • Perform regular maintenance checks – This will ensure the preventive measures are working effectively. This includes checking the sump pump connected to the drain tile system, inspecting the crawl space area for signs of moisture, etc.
  • Use flood vents – Flood vents are specially designed openings in the walls of your crawl space that allow water to flow in and out freely, depending on the water level outside your home. By allowing the water to move in and out of your crawl space, flood vents prevent the buildup of hydrostatic pressure that can cause serious damage. Flood vents are also an affordable and easy-to-install solution that can be added to your existing crawl space walls without major construction.

    To ensure the most effective flood protection for your home, it’s essential to choose the right flood vents and have them installed by an experienced professional. Look for flood vents that are ICC-certified, with engineered openings designed to provide maximum protection against flooding. For more information, see The SMART VENT Flood Vent System to Prevent Structural Damage.

Crawl space flooding can be a nightmare for any homeowner. Fortunately, proactive measures can help protect your home and its foundation from damage. If flooding has already occurred, options are always available to reduce the impact of water damage. Remember to seek professional help as soon as possible if you think flood water has entered your crawl space; the sooner you act, the less costly the repair will be.

If you’d like more information on how to better safeguard your crawl space from flood damage, don’t hesitate. Contact AMC911 today, and one of our team members will be able to work with you on finding the right solution for your needs.


Mariel McClung

Mariel McClung is AMC911’s Vice President and full-time mother. Mariel studied Marketing at The College of William & Mary and is the operational brain behind AMC911.

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