3.4 Hazards, Perils, Named vs. Open Perils, Blanket vs. Specific Insurance & Basic Construction Types

Key Takeaways

  • A peril is the cause of loss, such as fire or windstorm; a hazard is a condition that makes a loss more likely or more severe.
  • Physical hazards are tangible conditions, moral hazards involve dishonesty, and morale hazards involve carelessness or indifference because insurance exists.
  • Under a named-perils form the insured must show a listed peril caused the loss; under an open-perils form the insurer must show an exclusion applies.
  • Blanket insurance applies one limit across multiple locations or property types, while specific insurance assigns a separate limit to each item or location.
  • ISO construction classes run from Frame (1) through Joisted Masonry, Non-Combustible, Masonry Non-Combustible and Modified Fire Resistive to Fire Resistive (6).
Last updated: September 2026

Perils, Hazards, and Losses

Exam questions in the Insurance Basics domain (13% of Series 17-62) test vocabulary precisely. A public adjuster also needs this vocabulary to argue coverage correctly.

TermDefinitionExample
RiskUncertainty about whether a loss will occurA homeowner does not know whether the house will burn this year
ExposureThe property or activity that could be damaged or cause lossThe building, contents, and business income at a location
PerilThe cause of lossFire, lightning, windstorm, theft, collapse
HazardA condition that increases the chance or severity of lossOily rags in a garage, a vacant building, an owner in financial distress
LossThe reduction in value that resultsCharred framing, smoke-damaged contents, lost rent

The Three Hazard Types

  1. Physical hazard is a tangible condition of the property or its use: wood-frame construction, knob-and-tube wiring, stored flammables, a restaurant fryer without an automatic suppression system.
  2. Moral hazard is a character condition, meaning a tendency toward dishonesty. An insured in financial trouble who sets a fire, or who inflates an inventory, illustrates moral hazard. This is the underwriting basis for the concealment-and-fraud provision in the Standard Fire Policy.
  3. Morale hazard (sometimes called attitudinal hazard) is carelessness or indifference because insurance exists: leaving doors unlocked because "the policy will cover it," or failing to heat a vacant building in January.

Adjusting connection: many policy provisions exist to control hazards. Vacancy clauses, protective-safeguards endorsements, increase-in-hazard suspensions, and neglect exclusions are all hazard-control devices. When an insurer invokes one, the public adjuster checks the actual wording and the actual facts. For example, was the building "vacant" as the policy defines it, or merely "unoccupied"?

Named Perils vs. Open Perils

FeatureNamed-perils (specified) formOpen-perils ("special") form
Coverage grantOnly the causes of loss listed in the policyDirect physical loss unless excluded or limited
Burden of proofInsured must show a listed peril caused the lossInsured shows a direct physical loss; insurer must prove an exclusion applies
ExamplesDP-1, DP-2, HO-2, HO-3 Coverage C, CP 10 10 Basic and CP 10 20 BroadDP-3 and HO-3 Coverages A and B, HO-5, CP 10 30 Special

The older term "all risk" is avoided in modern forms because no policy covers every risk. Open-perils forms still exclude flood, earth movement, wear and tear, and many other causes.

Direct vs. Consequential (Indirect) Loss

  • Direct loss is physical damage to the property itself caused immediately by the peril: a fire burns the roof.
  • Consequential or indirect loss is the financial loss that follows because of the direct damage: lost business income, extra expense, additional living expense, spoilage from a power interruption, or lost rent.

Basic property coverage grants address direct loss. Consequential losses are covered only when the policy adds a time-element coverage (Coverage D in homeowners, Coverages D and E in dwelling forms, and business income forms in commercial lines). Section 3.2 covers the causation doctrines that decide whether a chain of events is still "direct."

Blanket vs. Specific Insurance

  • Specific insurance assigns a separate limit to each building, location, or class of property (Building 1: $2,000,000; Building 2: $800,000). A loss at Building 2 is capped at $800,000 even if Building 1 is over-insured.
  • Blanket insurance applies one limit across several buildings, locations, or types of property (one $2,800,000 limit covering both buildings and their contents). Blanket limits give flexibility after a large loss at one location. Insurers usually require a statement of values and a higher coinsurance percentage, and they may attach a margin clause that caps recovery for any one location at a percentage of its reported value. See Section 10.2.

Basic Types of Construction

Construction class affects how a fire spreads, how a building is rated, and what repair methods an estimate must include. The Insurance Services Office (ISO) uses six classes:

ISO classNameTypical description
1FrameExterior walls of wood or other combustible material, including brick-veneer over wood frame
2Joisted masonryMasonry exterior walls (brick, block, stone) with combustible (wood) floors and roof
3Non-combustibleExterior walls, floors, and roof of non-combustible materials such as metal
4Masonry non-combustibleMasonry exterior walls with non-combustible floors and roof
5Modified fire resistiveMasonry or fire-resistive materials with a fire-resistance rating less than Class 6
6Fire resistiveStructural members of materials with a high fire-resistance rating (typically at least two hours), such as reinforced concrete

Why the adjuster cares: a fire in a Class 2 joisted-masonry building often leaves exterior brick walls standing while the interior wood structure is destroyed. The estimate then turns on whether the remaining walls can be reused (engineering, bracing, code review) or must be demolished. That in turn drives ordinance-or-law coverage and valuation arguments. Frame buildings in dense New York neighborhoods raise exposure (adjacent-building) questions and smoke migration between attached structures.

Test Your Knowledge

An insured stops locking a detached garage because "the homeowners policy will pay if anything is stolen." Which type of hazard does this attitude illustrate?

A
B
C
D
Test Your Knowledge

Under an open-perils (special form) policy, who generally bears the burden of proving that an exclusion bars coverage for a direct physical loss?

A
B
C
D
Test Your Knowledge

A building has brick exterior walls with wood floor joists and a wood roof structure. Which ISO construction class describes it?

A
B
C
D