The short answer
Direct Water Away
Start with the ground around your house. The soil should slope away from the foundation, about six inches over ten feet. If the slope is flat or tilts toward the house, add fill dirt to create proper drainage. This simple step keeps rainwater from pooling against the walls.
Check your gutters and downspouts. Clean them twice a year, especially before the wet season. Extend downspouts at least six feet from the foundation. If you have a sump pump, test it regularly and consider a battery backup for power outages.
Seal Cracks and Openings
Inspect the basement walls and floor for cracks. Small cracks can let water seep through. Use a hydraulic cement or a masonry sealer to fill them. Pay attention to the joint where the floor meets the wall, a common entry point.
Check windows and doors. Make sure they seal tightly and that window wells have covers or proper drainage. If you have a floor drain, ensure it is clear and not blocked. These small fixes reduce the chance of water finding a way in.
- Seal wall cracks with hydraulic cement
- Install window well covers
- Clear floor drains
- Test sump pump monthly
- Add a backwater valve to the sewer line
Install a Sump Pump
A sump pump is a key defense for many basements. It collects groundwater and pumps it away from the house. If you already have one, test it by pouring water into the pit. If it does not turn on or pump out, have it repaired or replaced.
Choose a pump with enough capacity for your situation. A battery backup keeps it working during power outages, which often happen during storms. A plumber can help you select and install the right pump for your home.
Use a Flood Barrier
For homes in flood-prone areas, a temporary barrier can help. Sandbags or inflatable barriers placed around doorways and window wells redirect water. You can also install a permanent flood vent or a backwater valve to reduce pressure on the walls.
If you expect heavy rain, place barriers before the water rises. Keep them stored in a dry, accessible spot. For a more permanent solution, consider a French drain or a sump system. These options depend on your soil type and budget.
- Sandbags for doorways
- Inflatable barriers for windows
- Backwater valve for sewer backup
- French drain for yard runoff
- Sump pump with battery backup
Address Water Damage Early
Even with prevention, water can sometimes get in. Act fast to dry the area and prevent mold. Remove wet items, use fans and dehumidifiers, and clean surfaces with a mild detergent. If the flooding is extensive, call local water damage pros for extraction and drying.
Inspect the damage to find the source. Sometimes it is a leaky pipe, not groundwater. Fix the source before you repair walls or floors. If you live in Redmond, keep a list of emergency contacts handy. Quick action limits damage and reduces repair costs.
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Call Now (425) 407-5186Frequently asked questions
How often should I check my sump pump?
Test your sump pump every month. Pour a bucket of water into the pit and watch it pump out. Replace the battery backup annually. If the pump runs but does not remove water, have a plumber inspect it.
Can I prevent flooding by painting the walls?
Paint alone does not stop water. Use a waterproofing sealer on masonry walls, but it only works on minor dampness. For active leaks, you need to fix the grading or install drainage. Sealer helps, but it is not a complete solution.
What if my basement floods anyway?
Call the pros for extraction and drying. They can remove standing water and set up dehumidifiers. Also, check your insurance policy to see what is covered. Policies vary, and your insurer decides what is covered. Act quickly to prevent mold.