5 Tips For How to Prevent Basement Flooding During Heavy Rain
A flooded basement is a homeowner's worst nightmare. When it happens, your old pictures, the spare chest of drawers, your children's clothes — it could all be in jeopardy. It's especially important to watch out for basement floods if you live in certain flood-prone areas of the U.S., like the upper Midwest, but it can't hurt to know how to prevent basement flooding no matter where you live.
Check out these five tips for how to prevent basement flooding during heavy rain to keep your home safe.
Why Does Basement Flooding Happen During Heavy Rain?
When it rains hard, water often has nowhere to go, so it seeps into your basement through cracks, foundation walls, and floors. The problems can be worse if:
- You have poor drainage around your home
- Your sump pump fails
- Your house has clogged gutters
Floodplains, in particular, are susceptible to flooding because of their proximity to water, topographical layout, and soil composition.
#1 – Keep Gutters and Downspouts Clean and Clear
Clogged gutters and downspouts force water to spill over and seep into your basement. Over time, this excess water can erode your foundation. To prevent this:
- Remove leaves and debris from gutters at least twice a year.
- Extend downspouts at least five feet away from the foundation.
- Check for sagging or disconnected gutters.
If water collects around your foundation, it increases the risk of leaks. Learn more about how to prevent flooding around your house.
#2 – Install and Maintain a Sump Pump System
Sump pumps are devices you install in your basement floor. They can redirect excess water out of your basement and away from your home. They’re a great tool if you have chronic flooding problems. But to get the most benefits from them, you have to maintain them:
- Test the pump regularly by pouring a bucket of water into the pit.
- Clean the sump pit to prevent clogs.
- Install a battery or water-powered backup in case the power goes out.
If you don’t have a sump pump or need installation guidance, check out these sump pump installation tips.
#3 – Grade the Soil to Direct Water Away from Your Foundation
If your yard slopes toward your house, rainwater naturally pools around the foundation. This increases the likelihood of basement leaks. To improve drainage and prevent basement flooding in the long term:
- Reslope the ground away from the foundation at a minimum of six inches over ten feet.
- Add soil or landscaping material to maintain proper grading and keep water from pooling.
- Avoid planting shrubs too close to the foundation, as roots can trap moisture against the basement walls.
#4 – Seal Cracks in Foundation Walls and Basement Floors
Even small cracks in basement walls and floors can allow water to seep inside during heavy rain. These cracks expand over time, leading to potential structural damage. To keep your basement dry:
- Use a waterproof sealant to block water entry and reinforce weak areas.
- Check for new cracks annually and reseal them as needed.
- Schedule a professional inspection for serious foundation issues, such as large cracks or bowing walls.
#5 – Consider Installing a French Drain or Interior Drain Tile System
A French drain or drain tile system provides long-term basement flooding prevention by directing excess moisture away from your foundation. Here’s how these drainage solutions work:
- They collect water in a perforated pipe buried beneath gravel or rock.
- They redirect water to a drainage area, sump pump, or storm drain.
- They lower hydrostatic pressure buildup that forces water through foundation cracks.
Installing a French drain or interior drain tile system is a big job, as it involves digging a trench around the entirety of your home. Because of that, it’s a task best left to professionals for optimal results.
Frequently Asked Questions About Basement Flooding Prevention
Will sandbags prevent basement flooding?
Sandbags can help in minor flooding, but they aren’t a long-term solution. You might use them during an unprecedented storm. Otherwise, more effective flood prevention strategies include proper drainage, foundation sealing, and sump pump installation.
How do you prevent mold after a flooded basement?
To reduce the risk of mold growth after flooding, start the cleanup process right away. Remove standing water using a wet vacuum or pump. Use fans and dehumidifiers to dry the area thoroughly. Finally, wipe all surfaces with a mold-killing solution, such as diluted bleach or a commercial disinfectant.
Does clay soil prevent basement flooding?
Clay soil absorbs water, which can reduce runoff. However, it can also retain moisture near the foundation, increasing the risk of leaks. Homes built on clay-heavy soil should incorporate proper drainage solutions, such as French drains, to prevent water accumulation.
How do I know if I need a sump pump?
You may need a sump pump if you experience water pooling in your basement during heavy rain, even in small amounts. Also, if your basement is frequently damp or has musty odors, it’s a sign of too much moisture.
Take Basement Flood Prevention Steps Before the Next Storm
To protect your home from basement flooding, make sure to clean gutters and drainage pipes regularly. You might also consider installing a sump pump or French drain for a more permanent solution.
If you're experiencing ongoing basement flooding or need professional assistance with sump pump installation or drainage solutions, contact Roto-Rooter for expert help. Our experienced plumbers are ready to help safeguard your home from water damage.