The short answer
How Heavy Rain Saturates Foundation Soil
Soil expands when it absorbs large amounts of water from a storm. This swelling, called heaving, puts uneven pressure on your foundation walls and footings. Over time, this pressure can cause cracks in concrete or cause sections of the foundation to tilt or bow inward. Saturated soil also loses its load-bearing strength, which can lead to settling in parts of your home.
Clay-rich soils, common in many areas, are especially prone to expansion and contraction. After a storm, the soil holds the water for a long time, maintaining pressure. As the sun dries the soil, it shrinks away from the foundation, creating gaps. This cycle of wetting and drying weakens the soil's support, making future storm damage more likely to cause serious foundation issues.
Wind-Driven Water and Flooding Impacts
High winds during a storm do more than damage roofs. They can force rain sideways against your home, driving moisture into small cracks in the foundation's exterior. This water then seeps into your basement or crawlspace, leading to interior water damage and promoting mold growth behind walls or under flooring.
Flooding presents the most direct threat. When water pools around your foundation, it creates hydrostatic pressure. This is the force of the water pushing against the walls. If the pressure becomes too great, it can cause basement walls to crack or even collapse inward. Floodwater can also wash away supporting soil, a process called erosion, which undermines the foundation's stability.
- Water pools against foundation walls creating immense pressure.
- Hydrostatic pressure can cause wall cracks or inward bowing.
- Fast-moving floodwater can erode and wash away crucial supporting soil.
- Standing water prevents proper drainage and keeps soil saturated for weeks.
- Flooding often carries debris that can physically impact and damage the foundation.
- Salt or contaminants in floodwater can degrade concrete over time.
Recognizing Signs of Foundation Trouble
After a major storm, inspect your home's interior and exterior for warning signs. Inside, look for new cracks in drywall, especially around door frames and windows. Doors or windows that suddenly stick or won't close properly can indicate a shifting foundation. Floors that feel uneven or slope noticeably are another serious red flag.
Outside, walk around your home's perimeter. Look for new, widening cracks in the foundation walls themselves. Check for gaps between the foundation and the exterior siding or brick. Observe if any part of the foundation appears to be sinking or separating from the rest of the structure. Cracks in your driveway or patio that lead toward the house can also signal soil movement.
Immediate Actions to Take After a Storm
Your first priority is safety. If you see significant cracks or shifting, or if doors are jammed shut, consult a structural engineer or foundation specialist before re-entering. While waiting for an assessment, you can take steps to prevent further water accumulation. Clear gutters and downspouts of debris to ensure they direct water away from your home.
Use a wet-dry vacuum or pump to remove standing water from around the foundation if it is safe to do so. If you have a sump pump, check that it is operating. Document all damage with photos and notes for your insurance company. Policies vary, and your insurer decides what is covered. Then, contact local water damage pros to address any interior flooding and moisture.
Long-Term Prevention and Professional Solutions
Preventing future problems involves improving drainage around your home. Extend downspouts so they discharge water at least five feet from the foundation. Grade the soil so it slopes away from your house. Consider installing French drains or a sump pump system to manage groundwater. These measures help keep the soil around your foundation consistently dry and stable.
- Extend downspouts to discharge water far from the foundation.
- Grade soil to create a slope directing water away from the house.
- Install gutter guards to prevent clogs from leaves and debris.
- Use foundation plantings with deep roots to help absorb excess water.
- Ensure window wells have proper covers and drainage.
- Schedule regular inspections of your foundation and drainage systems.
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Call Now (405) 565-9833Frequently asked questions
What should I do if I see a new foundation crack after a storm?
First, monitor the crack. If it is growing wider or longer, or if you see signs of water seepage, contact a foundation specialist for an assessment. Do not attempt to seal a significant structural crack yourself, as this can trap moisture inside and worsen the problem.
Can tree roots near my home cause foundation problems in a storm?
Yes, large tree roots can absorb massive amounts of water from the soil, especially during a drought. When a storm soaks the ground, the roots expand and the soil swells, which can create shifting and pressure against your foundation. It's wise to keep large trees a safe distance from your home.
Does homeowners insurance cover storm-related foundation repair?
Coverage depends entirely on your policy's cause of loss. Sudden damage from a covered peril like a windstorm or hail might be included. Damage from flooding or long-term seepage is often excluded. Policies vary, and your insurer decides what is covered. Review your policy and document the damage thoroughly.