Quick answer: Usually not for the most common causes. The standard HO-3 excludes settling, shrinking, bulging and expansion, including the resulting cracks in foundations, and it excludes earth movement such as earthquakes, landslides and most sinking ground. Foundation damage is generally covered only when a covered peril causes it, such as a sudden plumbing leak, a vehicle hitting the house, a fire or a fallen tree. Earthquake and sinkhole damage need separate coverage, and flood damage needs a flood policy.
Few things worry a homeowner more than a new crack in the foundation, a door that suddenly sticks or a floor that slopes where it did not before. Foundation repairs can be expensive, and the first question many people ask is whether insurance will help.
The answer depends almost entirely on why the foundation moved. This article explains how the Insurance Services Office (ISO) Homeowners 3 Special Form, the model most U.S. insurers build on, treats foundation damage. For the overall structure of a policy, start with our homeowners insurance guide.
Sources: Insurance Services Office (ISO) Homeowners 3 Special Form (HO 00 03) exclusions for settling, cracking, earth movement and water, and the additional coverage for collapse; Insurance Information Institute (Triple-I) and National Association of Insurance Commissioners (NAIC) consumer guidance; Federal Emergency Management Agency (FEMA) National Flood Insurance Program materials. Policies differ by insurer and state. This is general information, not insurance advice. Read your own policy.
How an HO-3 Approaches Foundation Damage
Coverage A in a standard HO-3 protects the dwelling, including its foundation, on an open perils basis. That means damage is covered unless the policy excludes it. The trouble for foundation claims is that the most common causes of foundation movement are on the exclusion list.
Our explainer on Coverages A through F shows where the dwelling fits in the larger policy. For foundations, three groups of exclusions matter most:
- Wear, deterioration and settling. The ISO form excludes settling, shrinking, bulging or expansion, including resulting cracking, of foundations, footings, walls, floors, patios and pavements.
- Earth movement. The policy excludes earthquakes, landslides, mudflow, mine subsidence, sinkholes and earth sinking, rising or shifting, regardless of cause, with limited exceptions for ensuing fire or explosion.
- Water. The policy excludes flood, surface water and water below the surface of the ground that seeps or flows through a foundation, along with water backup unless an endorsement is added.
Together, those exclusions remove coverage for the slow movement most foundation repair companies see every day.
Common Causes and How They Are Usually Treated
| Cause of damage | Usually covered under a standard HO-3? |
|---|---|
| Normal settling and shrinkage cracks | No, excluded |
| Expansive clay soil swelling and shrinking | No, earth movement and settling exclusions |
| Poor construction or defective design | Generally no; resulting damage may be considered |
| Tree roots | Generally no |
| Earthquake | No, needs earthquake coverage |
| Sinkhole or ground collapse | No, unless sinkhole or catastrophic ground cover collapse coverage applies |
| Flood or rising groundwater | No, needs flood insurance |
| Sudden plumbing leak under or inside the house | Often yes for resulting water damage |
| Vehicle striking the house | Yes, vehicles are a covered peril |
| Tree falling on the house | Yes, if a covered peril such as wind caused it |
| Fire or explosion | Yes |
Each claim depends on the exact facts and policy wording, so treat the table as a starting point, not a decision.
When Foundation Damage Can Be Covered
Sudden Plumbing Leaks
The ISO form contains an important exception to its settling and wear exclusions. If one of those excluded causes leads to water damage from a plumbing, heating, air conditioning or sprinkler system, the resulting water damage can be covered. The form also pays to tear out and replace part of the building to reach the system that leaked.
That means a sudden break in a pipe under a slab may produce a covered claim for the water damage and access costs. The pipe repair itself and any slow leak that went on for weeks are generally not covered. Insurers often investigate carefully, because the line between a sudden leak and long-term seepage decides the claim.
Impact and Fire
A car that crashes into the house, a large tree blown down by wind or a fire that damages footings are all covered perils. Damage to the foundation caused by those events is treated like any other covered dwelling damage, subject to your deductible and limits. Our guide to fallen tree coverage covers the tree rules in more detail.
Collapse
The ISO form includes an additional coverage for collapse, defined as an abrupt falling down or caving in of a building or part of it. It applies only to certain causes, such as hidden decay, hidden insect damage, the weight of people or contents and defective materials if the collapse happens during construction. The form states that collapse does not include settling, cracking, shrinking, bulging or expansion. A cracked but standing foundation usually does not qualify.
Earthquake, Sinkhole and Flood Gaps
The earth movement and water exclusions are where separate coverage comes in.
Earthquake. Earthquake coverage is sold as an endorsement or a separate policy, often with a percentage deductible. Our earthquake insurance basics guide explains how those deductibles work.
Sinkholes. Some states have special rules. Florida, for example, requires insurers to cover catastrophic ground cover collapse, while broader sinkhole coverage is optional. Our article on sinkhole insurance walks through that distinction.
Flood. Water from outside that rises around the foundation is flood, which homeowners policies exclude. Coverage comes from the National Flood Insurance Program or a private flood insurer, usually with a 30-day waiting period for new NFIP policies.
Engineering Reports and Disputes
Foundation claims often turn on causation, so insurers frequently hire a structural engineer to inspect the home. The engineer’s report may conclude that cracking came from long-term settling or soil movement, both excluded, or from a sudden covered event.
If you disagree with the findings:
- Ask for a copy of the engineer’s report and read the reasoning.
- Consider hiring your own licensed structural engineer for a second opinion.
- Gather records such as plumbing invoices, leak detection reports and photos showing when the damage appeared.
- Use the policy’s appraisal clause if the dispute is about the amount of loss.
- Contact your state insurance department if you believe a claim was handled unfairly.
Foundation Types and the Problems Each Tends to Have
The type of foundation under your home affects both the kinds of problems you are likely to see and how a claim may play out.
Slab-on-grade. Common in warmer regions, a slab is a concrete pad poured directly on prepared soil. Plumbing lines often run beneath or within the slab, which is why sudden under-slab leaks are a frequent source of foundation-related claims. Soil that swells and shrinks with moisture can also crack or lift a slab, which falls under the settling and earth movement exclusions.
Crawl space. The house sits on footings and piers or walls with a short open space below. Moisture, poor ventilation and wood-destroying insects are common concerns, and sagging floors often trace back to deteriorated supports rather than a single sudden event.
Basement. Full basements add living or storage space below grade. Water intrusion is the main concern, and the source of the water decides the coverage: a burst pipe is treated differently from groundwater seepage, sewer backup or flooding.
Pier and beam. Older homes and coastal homes may sit on piers. Shifting piers usually reflect soil movement or deterioration, both excluded, while damage from a vehicle or storm surge may fall under other coverages, with surge needing flood insurance.
Coverage Options to Ask About
Because the base policy excludes so many causes, a short conversation with your agent can help you decide which add-ons make sense:
- Water backup coverage for water that comes up through drains or overflows from a sump pump.
- Earthquake coverage if you live in a seismically active area.
- Sinkhole coverage where it is offered, beyond any required catastrophic ground cover collapse coverage.
- Flood insurance from the NFIP or a private insurer, even outside high-risk zones.
- Ordinance or law coverage, which helps pay to bring repaired parts of the home up to current building codes after a covered loss. The ISO HO-3 includes a basic amount, often 10 percent of the dwelling limit, and higher limits can be purchased.
Buying or Selling a Home With Foundation Repairs
Foundation history matters during a sale. Many states require sellers to disclose known material defects, and past foundation repairs often appear on disclosure forms. Buyers commonly hire a home inspector and, when there are concerns, a structural engineer.
Insurers may ask about prior foundation work when writing a new policy. Repair records, engineering reports and any transferable repair warranty from the foundation contractor can help both the sale and the insurance application.
Signs of Foundation Trouble to Watch For
Catching movement early helps you separate normal settling from a sudden event and keeps repair costs lower. Common warning signs include:
- Diagonal or stair-step cracks in brick or block walls.
- Cracks in drywall above door and window frames.
- Doors and windows that stick or no longer latch.
- Sloping or bouncing floors.
- Gaps between walls and ceilings or floors.
- Unexplained damp spots on slab floors or a sudden jump in the water bill.
- The sound of running water when no fixtures are on.
Hairline shrinkage cracks in new concrete are common and often harmless. Wide, growing or uneven cracks deserve a professional opinion.
Protecting the Foundation and Your Claim
The policy expects you to maintain the home and to protect it from further damage after a loss. Practical steps include:
- Manage water around the house. Keep gutters clean, extend downspouts away from the foundation and grade soil so it slopes away.
- Keep soil moisture steady. In areas with expansive clay, very dry or very wet soil near the foundation can contribute to movement.
- Watch large trees planted close to the house.
- Fix plumbing leaks quickly. Long-running leaks can be excluded and can damage soil under the slab.
- Photograph cracks with a dated measuring tape for reference, so you can show when something changed.
How to File a Foundation Claim
If you believe a covered event damaged your foundation:
- Document the damage with photos and video before repairs.
- Stop any active leak by shutting off the main water valve.
- Call a licensed plumber to locate a suspected leak and keep the leak detection report.
- Notify your insurer promptly and describe what happened and when.
- Keep receipts for emergency repairs and mitigation.
- Meet the adjuster and any engineer, and ask what they are looking for.
Our step-by-step guide on how to file a homeowners insurance claim explains the process from first notice to settlement.
Frequently Asked Questions
Does homeowners insurance cover foundation cracks?
Usually not when cracks come from settling, shrinking or soil movement, which the standard HO-3 excludes. Cracks caused by a covered peril, such as a vehicle impact or a sudden plumbing leak, may be covered.
Is foundation repair covered by home insurance if a pipe bursts?
The resulting water damage and the cost to tear out part of the building to reach the pipe are often covered. Repairs to the pipe itself and damage from slow leaks are generally not.
Does homeowners insurance cover foundation damage from an earthquake?
No. Earthquake damage requires an earthquake endorsement or a separate earthquake policy.
Does homeowners insurance cover foundation damage from tree roots?
Generally no. Root damage develops over time and falls under exclusions for settling, deterioration and earth movement in most policies.
Will my insurer cancel my policy over foundation cracks?
Cracks alone do not automatically lead to cancellation, but insurers may ask about visible structural issues at renewal or inspection. Keeping repair records and fixing problems promptly helps.
Can I buy separate foundation insurance?
There is no standard stand-alone foundation policy. The main ways to fill gaps are earthquake coverage, sinkhole coverage where offered, flood insurance and water backup endorsements.
The Bottom Line
Homeowners insurance protects the foundation from sudden covered events, not from the slow movement that causes most foundation repairs. Know the settling, earth movement and water exclusions, consider earthquake, sinkhole and flood coverage based on where you live, maintain drainage around the house and act quickly on leaks to protect both the structure and any claim.
