What homeowners insurance doesn't cover

A standard homeowners policy does not cover flood or surface water, earthquake and other earth movement, sewer or drain backup, wear and tear, deterioration, neglect, most mold, pest damage, intentional acts, war or nuclear hazard. It also leaves out some property (land, cars, animals, business data) and some liability (auto, most business activity, injury to your own household). Several of these gaps can be closed with a separate policy or an endorsement, which is why reading the exclusions before a loss is cheaper than reading them after.

This guide follows the ISO HO-3 (form HO 00 03 05 11), the model for most U.S. homeowners policies. Your insurer's form and your state's amendatory endorsements can add, narrow or remove exclusions, so check your own policy. What is covered is in what does homeowners insurance cover?.

Three layers of "not covered"

Exclusions show up in three places in the policy, and a claim denial usually cites one of them.

• The Section I Exclusions page. Nine broad exclusions, from ordinance or law to governmental action, apply to the whole property half of the policy. A second group, covering weather conditions, acts or decisions of others and faulty planning, design, workmanship, materials or maintenance, applies to the dwelling and other structures.
• Exclusions inside the covered perils. The part of the form that says the insurer insures the dwelling against direct physical loss then lists what it will not insure: collapse (except as separately covered), freezing in an unheated house, most mold, wear and tear, rust, settling and cracking, and damage by birds, rodents or insects.
• Property and liability that are never covered. Land, motor vehicles, animals and business data on the property side; auto, watercraft, business and professional liability on the liability side.

The main exclusions, with the usual fix

Water: where most denials start

The water exclusion is the one homeowners hit hardest. Under the HO-3, "Water" means flood, surface water, waves, tides, overflow of any body of water and spray from these, whether or not wind drives them, including storm surge. It also means water that backs up through sewers or drains, water that overflows from a sump, and groundwater that seeps through a building, foundation or driveway. The exclusion applies regardless of whether the water is caused by nature or otherwise, and includes failures of a dam, levee or seawall.

Water from a burst pipe is different: the form covers accidental discharge from plumbing, heating, air conditioning and sprinkler systems and household appliances. The line is mostly the water's source. See is water damage covered by homeowners insurance? and, for the hurricane version of the argument, wind vs water: the hurricane claim dispute.

The fixes are separate products. Federal flood insurance through the National Flood Insurance Program carries a standard 30-day waiting period for new policies, with exceptions for loan closings and certain map changes, and for a single-family home limits of $250,000 for the building and $100,000 for contents, according to FEMA's Flood Insurance Manual (October 2025 edition). A water backup endorsement is a different, smaller purchase that covers sewer and sump events. See does homeowners insurance cover flooding? and water backup and sewer backup coverage.

Wear, tear and neglect

Insurance pays for sudden events, not for the slow end of a product's life. The HO-3 excludes wear and tear, marring, deterioration, mechanical breakdown, latent defect, rust, corrosion and dry rot, plus faulty workmanship and defective maintenance. A roof that fails because the shingles are 25 years old, a water heater that rusts out and a deck that rots are maintenance items.

The form then adds a sentence that is easy to miss: any ensuing loss to the dwelling or other structures that no other provision excludes is covered. Say a corroded supply line fails and floods the kitchen. The pipe is not covered, but the resulting water damage to cabinets and flooring may be. Disputes arise over what is "ensuing" and what is gradual, which is the focus of sudden vs gradual water damage: where insurers draw the line and termites, pests, wear and tear: the maintenance exclusions.

Neglect works differently. It excludes loss that follows a covered event because you failed to use all reasonable means to save and preserve the property at and after the time of loss. Leave a storm-damaged roof uncovered for weeks and the insurer can refuse the rain damage that follows. The form also requires you to make reasonable and necessary repairs to protect the property and keep a record of what you spend.

The wording that lets exclusions override cause

The HO-3's Section I exclusions begin with a lead-in that matters in a mixed-cause loss: the loss is excluded no matter what other cause or event contributed to it, concurrently or in any sequence. That is an anti-concurrent-causation clause. If flood and wind both damage a house, the insurer can argue the whole loss is excluded rather than split. Courts and states treat these clauses differently, and the burden of proving which cause did what often decides the outcome. See anti-concurrent causation clauses explained.

The form carves out one thing helpfully. Direct loss by fire, explosion or theft that results from earth movement or water is still covered, so a fire after an earthquake falls to the policy even though the earthquake does not.

Property and liability the policy leaves out

On the property side, Coverage C does not cover animals, birds or fish, motor vehicles and most of their parts, aircraft, business data, property of tenants and roomers who are not related to you, or property rented to others. Land is excluded from Coverages A and B. Items insured by their own schedule are excluded here and covered there.

On the liability side, Coverages E and F exclude:

• Motor vehicles registered for road use, and most watercraft and aircraft liability.
• Business activity and professional services.
• Expected or intended injury.
• Injury to you or to residents of your household.
• Injury to anyone eligible for benefits you provide or must provide under a workers' compensation law.
• Damage to property you own or rent, except certain fire, smoke and explosion damage to rented property.

Home-based work and short-term rentals sit on the edge of these exclusions; see running a business from home: the insurance gaps and Liability exclusions: what Coverage E won't pay.

Finding your own gaps

1. Pull your declarations page and list every form number and endorsement. Anything not listed is not part of your policy.
2. Look up your flood zone, then decide separately on flood coverage whether or not a lender requires it.
3. Find out whether your policy includes water backup, and at what limit.
4. Check your county and state for earthquake or sinkhole exposure and read what your state requires insurers to offer.
5. Compare your valuables against the special limits. The HO-3 pays no more than $1,500 for stolen jewelry and watches, a ceiling that surprises owners after a theft. ISO's newer 2022 forms raise several of these limits (jewelry theft to $2,000, for example), but North Carolina's version does not take effect until June 1, 2027, and most policies still use the 2011 form or an insurer's own.
6. Ask whether any activity you do at home, from a daycare to short-term rentals, triggers a business exclusion.
7. Ask your agent for a written list of the optional endorsements your insurer offers. homeowners endorsements worth considering is a starting point.

Key takeaways

• Flood, earthquake, sewer backup, wear and tear, neglect, intentional loss, war and nuclear hazard are excluded from the standard HO-3, along with certain property and liability.
• The water exclusion turns on the source: a burst pipe is covered, flood and sewer backup are not, and flood and backup coverage are sold separately.
• The ISO form excludes the worn or corroded part, but covers an ensuing loss that nothing else excludes, so a failed pipe and the water damage it causes can be treated differently.
• Anti-concurrent-causation wording can exclude a whole mixed-cause loss, which is why wind-versus-water disputes are hard to settle.
• Close gaps before a loss: flood, backup, earthquake, high-value items and business activity each have their own fix.