What Home Insurance Never Covers: 10 Surprising Gaps
"Open peril" sounds like "everything," and that is the misunderstanding this guide is built around. A standard HO-3 does cover the house against any direct physical loss that the form does not exclude, but the same form removes whole categories of damage (flood, earthquake, sewer backup, an outage that starts down the street), caps others at amounts most owners never notice ($200 for cash in the standard ISO wording), and pays only a slice of what it costs to rebuild a burned house to today's building code. The ten gaps below are the ones that surprise people most, including a few fire twists that run in the opposite direction from what you might expect. The policy language quoted here comes from the ISO Homeowners 3 Special Form, edition HO 00 03 10 00 (copyright ISO 1999), as hosted by the Insurance Information Institute (Triple-I); newer editions and insurer-specific forms can differ by state, so treat each point as something to confirm in your own booklet.
This guide does not re-explain what an exclusion is; how insurance exclusions work and the most common examples are covered in a separate guide. The focus here is the gap between what homeowners believe and what the form actually says. If you are not sure which policy form you have, the differences between HO-1 through HO-8 policy types are the place to start, because an HO-3 and an HO-5 handle some of these gaps differently.
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Water Your Policy Refuses to Call Water Damage
Owners who once had a burst pipe paid in full tend to conclude that "water damage is covered." It is, for one narrow kind of water: sudden, accidental discharge from inside the house. Three other kinds are carved out.
1. Flood, including the mudflow that follows a wildfire
The HO-3 excludes "Flood, surface water, waves, tidal water, overflow of a body of water, or spray from any of these, whether or not driven by wind," and it applies that exclusion regardless of any other cause contributing "concurrently or in any sequence." FEMA lists "homeowners' insurance policies cover flooding" as a myth in its Myths and Facts fact sheet (originally released June 11, 2019), noting that many owners "do not find out until it is too late." The cost of finding out is steep: FEMA's August 19, 2025 press release says one inch of floodwater can cause up to $25,000 in damage, and that in the 10 Central Texas counties hit by the July 2025 floods, more than 90% of homes had no National Flood Insurance Program (NFIP) coverage.
The fire twist runs in two directions. The same exclusion states that "direct loss by fire, explosion or theft resulting from water damage is covered," so a fire sparked by floodwater shorting a panel still falls under the homeowners policy. But water that arrives because of a fire does not. FEMA's "Flood After Fire" fact sheet (November 2020) explains that burned ground is left "charred, barren, and unable to absorb water," and that flood risk stays significantly higher "up to 5 years after a wildfire." Those flash floods and mudflows are flood losses, paid only by a flood policy.
Checking your own situation: Look for the "Water Damage" exclusion in Section I. If you want flood coverage, NFIP policies generally carry a 30-day waiting period, with limited exceptions, including one FEMA describes for flooding from federal land made worse by post-wildfire conditions when the policy is bought before the fire is contained or within 60 days after. NFIP building coverage for a single-family home tops out at $250,000, with $100,000 for contents.
2. Sewer and drain backup, and sump pump overflow
This one surprises people twice. The HO-3 excludes water "which backs up through sewers or drains or which overflows or is discharged from a sump, sump pump or related equipment," so a basement filling with sewage after a heavy storm is not the covered "water in the house" claim owners picture. And, as Triple-I's current guide "Protect your house from sewer backups" points out, sewer backups are not covered by flood insurance either. The homeowner is also responsible for the sewer lateral running from the house to the city main, which is where tree roots and aging pipes cause trouble.
Checking your own situation: Search your declarations page for a "water backup" or "sump discharge" endorsement. The NAIC's A Consumer's Guide to Home Insurance (2022) notes that such endorsements can be bought because most homeowners policies offer "limited or no coverage" for these events. Limits vary by insurer, so read the dollar figure attached to it rather than assuming it matches your dwelling limit. How an endorsement changes the base policy matters here, because the endorsement typically adds coverage only up to its own stated amount.
3. Slow leaks, wear and tear, and most mold
The form does not insure loss caused by "wear and tear, marring, deterioration," "mechanical breakdown, latent defect," rust, dry rot, settling cracks, or "mold, fungus or wet rot." The Texas Department of Insurance Home Insurance Guide (revised June 1, 2026) lists "a continuous water leak" among common exclusions. The difference owners miss is time: a supply line that bursts on Tuesday is sudden and covered; the same line dripping behind a cabinet for eight months is maintenance.
The mold exclusion has a narrow exception. The HO-3 does pay for mold hidden inside walls, ceilings or under floors when it results from an accidental discharge from plumbing, heating, air conditioning, fire sprinklers or household appliances. A sump pump, roof drain, gutter or downspout does not count as plumbing for that exception.
There is a post-fire angle too. The "Neglect" exclusion removes coverage when an insured fails "to use all reasonable means to save and preserve property at and after the time of a loss." After a fire, leaving a hole in the roof untarped or soaked drywall to sit for weeks can turn covered damage into excluded mold and rot.
When the Ground Shifts or the Power Goes Out
Both of these gaps involve events that feel completely outside an owner's control, which is exactly why people expect insurance to respond. In both cases the policy draws a sharp line between the event itself and a fire that follows it.
4. Earthquake, landslide and sinkhole
The "Earth Movement" exclusion removes earthquake, landslide, mudslide, subsidence, sinkholes and "any other earth movement including earth sinking, rising or shifting," with one important exception: "unless direct loss by fire or explosion ensues and then we will pay only for the ensuing loss." In plain terms, the cracked foundation is not covered, but the fire from a ruptured gas line is. The California Department of Insurance states this directly in its earthquake consumer guide (guide updated October 29, 2024): your homeowners policy "covers fire damage, even if an earthquake causes the fire," which is why an earthquake policy does not cover fire.
The gap also reaches your living expenses. The NAIC notes that if an earthquake makes your home unlivable and your policy does not cover earthquakes, it "won't pay for loss of use of your home," because loss of use coverage for hotel and temporary housing costs follows the peril that caused the damage.
Checking your own situation: Earthquake coverage is a separate policy or endorsement. In California, insurers selling residential property insurance must offer it. In Florida, Florida Statutes §627.706 (2025) requires every property insurer to cover "catastrophic ground cover collapse," while broader sinkhole coverage is offered for an additional premium, with a deductible that may be 1%, 2%, 5% or 10% of the dwelling limit. A Florida policy that excludes sinkhole must say so in bold, 14-point type.
5. A power outage that starts off your property
The "Power Failure" exclusion removes "the failure of power or other utility service if the failure takes place off the 'residence premises'." A spoiled freezer or a basement that floods because the sump pump lost power during a neighborhood outage falls into this gap. Triple-I's "Am I Covered?" guide describes food spoilage as generally not covered, with state-specific exceptions.
This gap has grown more relevant in wildfire country. The California Public Utilities Commission explains that utilities may temporarily turn off power during high fire-risk weather "to reduce the risk of fires caused by electric infrastructure," a Public Safety Power Shutoff (PSPS). An outage that was not your fault still counts as an off-premises power failure under the form. The exclusion does carve out one outcome: if the outage leads to a covered peril on your property, such as a fire, "we will pay for the loss caused by that peril."
Checking your own situation: Some insurers sell food spoilage or utility-interruption endorsements, and the terms vary widely. The documentation side of a spoiled-food claim is covered in what to record for a food spoilage insurance claim.
Small Caps Hiding Inside Coverage You Already Have
These three are not exclusions in the usual sense. The coverage exists, but it is capped at a figure far below what most owners assume, and the cap is buried in a list or an "additional coverage" paragraph rather than printed on the declarations page.
6. Cash, jewelry, firearms and silverware
Under Coverage C, the HO-3 sets "special limits of liability," each of which is "the total limit for each loss for all property in that category." In the 10 00 edition these include $200 on money, bank notes, bullion, coins and similar items; $1,500 on securities, deeds, passports and stamps; $1,500 for loss by theft of jewelry, watches, furs and precious stones; $2,500 for theft of firearms; and $2,500 for theft of silverware and goldware. Jewelry figures vary more than the others across sources: the standard form says $1,500, Triple-I's "Am I Covered?" guide describes $1,000 to $2,000 for jewelry theft, and some insurers set it lower still.
The twist is in two words: "by theft." In the standard ISO form, the jewelry, firearm and silverware caps apply only to theft. A ring destroyed in a covered house fire is not held to the $1,500 theft cap; it falls under the general personal property coverage limit for your belongings, subject to how the policy values it. Cash is different. The $200 limit applies to cash lost to any cause, fire included, so money kept in a drawer at home is effectively uninsured above that amount.
Checking your own situation: Find the "Special Limits Of Liability" paragraph under Coverage C and compare each figure with what you actually own. Also check whether your personal property is settled at replacement cost or depreciated value, since actual cash value versus replacement cost settlement changes what a covered ring or watch pays. For items above the caps, the route is a scheduled personal property endorsement or floater, walked through step by step in insuring jewelry and art beyond standard policy limits.
7. Home business property and business liability
The same special-limits list caps property used "primarily for 'business' purposes" at $2,500 on the residence premises and $500 away from it. Section II separately excludes bodily injury and property damage "arising out of or in connection with a 'business'" (with narrow exceptions). The NAIC's "Working from Home & Your Insurance Coverage" (January 1, 2018) states that business-related property and liability exposures are "typically excluded from a traditional homeowners policy."
Owners are surprised because a laptop feels like personal property and a visiting client feels like any other guest. A fire in a home office can hit both caps at once: inventory and equipment run into the $2,500 limit, and a client injured in the same incident falls outside liability coverage. The full breakdown is in fire coverage gaps for a home-based business.
8. Rebuilding to today's building code after a fire
This is the most expensive gap on the list for older homes. The "Ordinance Or Law" exclusion removes the extra cost of meeting current construction codes, except for an additional coverage that lets you "use up to 10% of the limit of liability that applies to Coverage A" for those increased costs. When a 1970s house burns, the rebuild must meet today's electrical, energy and, in high-hazard areas, wildfire-resistant construction rules. The policy restores the house to "like kind and quality"; the extra cost of code compliance comes only from that 10% allowance. On a $400,000 dwelling coverage (Coverage A) limit, that is $40,000, which is simple arithmetic, not a typical cost figure.
The California Assembly Committee on Insurance, in its analysis of SB 876 for a June 24, 2026 hearing, noted that "building code upgrades required during reconstruction are often not fully covered, creating unexpected financial gaps." SB 876 would, among other changes, measure building code upgrade coverage by the codes in effect at the time of rebuilding rather than at the time of loss. According to Senator Steve Padilla's September 1, 2026 release, the bill passed the Legislature (Senate 26-9, Assembly 44-16) and went to Governor Newsom. As of this writing, we could not confirm that it had been signed.
One reverse surprise belongs here. The HO-3 excludes destruction "by order of any governmental or public authority," but that exclusion does not apply to acts "taken at the time of a fire to prevent its spread," as long as the fire loss itself would be covered. If firefighters tear down part of your house to stop a blaze, that damage is covered.
Checking your own situation: Look for "Ordinance Or Law" under Additional Coverages in Section I and any endorsement that raises the percentage. The NAIC describes an ordinance or law endorsement as paying the extra expense to rebuild under codes "that didn't exist when your home was originally built."
Conditions That Quietly Switch Coverage Off
The last two gaps depend less on what happened and more on the state of the house when it happened.
9. Termites, rodents and your own pets
The form excludes loss caused by "birds, vermin, rodents, or insects" and by "animals owned or kept by an 'insured'." Termite damage can be structurally serious and feel sudden on the day someone discovers it, but the policy treats it as a slow process the owner was expected to catch. The same logic applies to the dog that chewed through the door frame or the cat that shredded the carpet. The Texas Department of Insurance guide lists "termites, insects, rats, or mice" among its standard exclusions, and the NAIC consumer guide groups termites and other infestations with damage homeowners insurance typically leaves out.
A liability claim for a dog bite is a separate question. It usually falls under the personal liability section of a homeowners policy, although Triple-I notes that some insurers decline certain breeds or exclude a specific dog after a bite.
10. A house left empty for more than 60 days
The HO-3 removes vandalism and malicious mischief coverage "if the dwelling has been vacant for more than 60 consecutive days immediately before the loss," and glass breakage carries the same limit. Freeze damage to plumbing is excluded unless the owner used reasonable care to keep the heat on or to shut off and drain the water, a condition an empty house often fails. The Texas Department of Insurance guide notes that the vacancy period is "the number of days specified by your policy," so 60 is the ISO baseline, not a universal number.
The people caught by this are rarely careless: snowbirds, owners waiting on a sale, heirs settling an estate, and families displaced by a fire who are living elsewhere while the house is rebuilt. How different policy forms treat the vacancy clock, and what a vacancy permit changes, is laid out in why vacant homes need special insurance coverage.
Taken together, these ten gaps share one pattern. Each is a category the policy handles on purpose, usually because the risk is catastrophic (flood, earthquake), gradual (leaks, termites), or priced separately (valuables, business use, code upgrades). Most can be closed with a separate policy or an endorsement, and the few that cannot are maintenance issues. Nothing in this guide replaces your own policy booklet; forms vary by insurer, edition and state. Before your next renewal, open the booklet to Section I Exclusions and the Coverage C special limits, set it beside your declarations page, and mark each of the ten items above as closed, capped or open for your house.
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