4.3 Section I Perils Insured Against and Exclusions

Key Takeaways

  • On HO-3 the dwelling and other structures are open-peril (covered unless excluded) while personal property is covered for the broad named-peril list of sixteen perils.
  • Flood is the most-tested exclusion and is never covered by a homeowners policy; coverage requires a separate National Flood Insurance Program (NFIP) policy.
  • Earthquake and earth movement are excluded and need an endorsement or Difference-in-Conditions (DIC) policy; an ensuing fire is generally still covered.
  • The anti-concurrent causation clause denies a loss when an excluded peril (flood) combines with a covered peril (wind), so wind and water damage must be separated.
  • Maintenance losses (wear and tear, rust, mold, vermin, settling, mechanical breakdown) and gradual water (seepage, sewer backup) are excluded; sudden and accidental internal water is covered.
Last updated: June 2026

Perils Insured Against

Which perils trigger coverage depends on the form and the coverage. On HO-3, the dwelling and other structures are open peril (any cause not excluded), while personal property is covered only for a list of named perils.

The Broad Named-Peril List (16 perils)

Used for contents on HO-3 and throughout HO-2:

  1. Fire or lightning
  2. Windstorm or hail
  3. Explosion
  4. Riot or civil commotion
  5. Aircraft
  6. Vehicles
  7. Smoke
  8. Vandalism or malicious mischief
  9. Theft
  10. Falling objects
  11. Weight of ice, snow, or sleet
  12. Accidental discharge or overflow of water or steam
  13. Sudden tearing apart, cracking, or burning of a heating/air-conditioning system
  14. Freezing of plumbing, heating, or air conditioning
  15. Sudden and accidental damage from artificially generated electrical current
  16. Volcanic eruption

Note: Perils 10-16 (the "broad" perils) are what separate the HO-2 broad list from the older, narrower basic list.

Why Exclusions Exist

Exclusions fall into three buckets:

  • Catastrophic / correlated perils that could bankrupt an insurer (flood, earthquake, war, nuclear).
  • Maintenance problems the owner controls (wear and tear, mold, vermin).
  • Exposures belonging on another policy (auto, business).

Structure vs. Contents — Same Loss, Different Trigger

Because HO-3 covers the structure open peril but contents named peril, one event can produce a split result. Suppose an unexplained electrical surge of unknown origin damages the home's wiring and also fries a television.

The wiring (part of Coverage A, open peril) is paid unless the insurer proves an exclusion. The television (Coverage C, named peril) is paid only if the loss matches a listed peril — here, sudden and accidental damage from artificially generated electrical current is on the list, so the TV is covered too.

Change the contents loss to something not on the list, and only the structure would be paid. Reading the form's two peril bases together is the skill the exam rewards.

Catastrophic Exclusions

ExclusionReasonWhere to get coverage
Flood (surface water, storm surge, overflow)Correlated, severeNFIP flood policy
Earthquake / earth movement (landslide, mudflow, sinkhole)Regional catastropheEarthquake endorsement / DIC
WarUninsurableNone
Nuclear hazardCatastrophicNone
Ordinance or lawPolice powerOrdinance or Law endorsement (partial)

Exam alert: Flood is the #1 tested exclusion. When a hurricane brings both wind (covered) and storm-surge flood (excluded), only the wind damage is paid.

Maintenance and Gradual-Loss Exclusions

The policy is not a maintenance contract:

ExcludedWhy
Wear and tear, deteriorationNormal aging
Rust, corrosion, dampnessMaintenance
Mold, wet rot, dry rotPreventable / gradual
Insects, vermin, rodents, birdsPest-control duty
Settling, cracking, shrinkingNormal building movement
Mechanical breakdownWarranty matter

Water Damage — The Covered / Excluded Split

Excluded waterCovered water
Flood / surface water / storm surgeSudden burst pipe
Sewer or drain backupAccidental overflow of plumbing
Seepage or continuous leakage over timeRain through a wind-damaged roof
Groundwater / hydrostatic pressureWater used to extinguish a fire

Rule of thumb: Sudden and accidental internal water is covered; surface, ground, backup, or gradual water is excluded. The Water Backup endorsement buys back sewer/drain backup.

Anti-Concurrent Causation

When an excluded peril and a covered peril combine to cause one loss, the anti-concurrent causation language excludes the loss even if the covered peril contributed. A hurricane delivers wind (covered) and flood (excluded); the adjuster must separate the wind loss (paid) from the flood loss (denied), and inseparable damage may be denied entirely.

Ensuing Loss — The Exception Inside Exclusions

Many exclusions contain an ensuing loss (or resulting loss) exception. Even though a peril is excluded, the policy may still pay for a covered peril that results from it. Classic example: earthquake damage is excluded, but if the quake ruptures a gas line and a fire follows, the fire damage is generally covered, because fire is a separate covered peril.

Vacancy

If the dwelling is vacant more than 60 consecutive days before a loss, vandalism and glass breakage are excluded and certain other losses may be limited. The distinction between vacant (empty of both people and contents) and merely unoccupied (furnished but no one present) matters: a furnished vacation home is unoccupied, not vacant, so the 60-day vandalism rule may not bite.

How Exclusions Drive Endorsement Sales

Producers translate exclusions into recommendations, and the exam tests the matching:

Excluded perilRecommended solution
FloodNFIP flood policy
Sewer / drain backupWater Backup endorsement
Earthquake / earth movementEarthquake endorsement or DIC policy
Mold (above a small sublimit)Mold buy-back endorsement
Ordinance or law (rebuild to code)Ordinance or Law endorsement

Knowing the exclusion is only half the job; matching it to the correct fix is what the licensing exam and the real client expect.

Intentional Loss and Neglect

Two further property conditions function like exclusions. Intentional loss caused by or at the direction of an insured is never covered — you cannot collect for damage you deliberately cause. Neglect to use all reasonable means to save and preserve property at and after a loss bars recovery for the additional damage that neglect produces. Both reflect the principle that insurance restores fortuitous (accidental) losses, not losses the insured chose or allowed to worsen, which is why an open-peril form still will not pay a deliberately set fire or a soaked floor the owner left to rot.

Test Your Knowledge

A hurricane drives both wind and storm-surge flooding into an insured's home. Under a standard HO-3, the insurer will:

A
B
C
D
Test Your Knowledge

An earthquake ruptures a gas line and the resulting fire destroys part of the home. Under a homeowners policy without an earthquake endorsement, the fire damage is:

A
B
C
D