What Is an Anti-Concurrent Causation Clause for Florida Property Insurance Claims?

Anti-concurrent causation language appears in many Florida homeowners and commercial property insurance policies. After hurricanes and other multi-peril losses, insurers often rely on ACC clauses to deny or limit claims involving wind, rain, storm surge, flooding, wear and tear, or other disputed causes.

Below are common questions about how ACC clauses work, when they may be enforceable, and how Florida policyholders can challenge an ACC-based denial.

What Is An Anti-Concurrent Causation Clause In A Florida Property Insurance Policy?

An anti-concurrent causation clause, often called an ACC clause, allows an insurer to deny coverage when an excluded cause contributes to the loss, even if a covered cause also caused damage.

The clause usually says an exclusion applies regardless of any other cause or event that contributes concurrently or in any sequence to the loss. In practical terms, if flooding, storm surge, wear and tear, or another excluded cause plays any role in the damage, the insurer may argue the entire claim is barred.

ACC language is designed to limit the more policyholder-friendly concurrent causation rule, which may otherwise allow coverage when at least one covered peril contributes to the loss.

How Do Florida Insurers Use ACC Clauses To Deny Property Insurance Claims?

Insurers often use ACC clauses by identifying an excluded cause and claiming it contributed to the damage. In hurricane claims, that excluded cause is often flood, storm surge, surface water, deterioration, or pre-existing damage.

Once the insurer connects the loss to an excluded cause, it may argue that the entire claim is excluded, even if wind or another covered peril caused substantial damage.

Whether that denial is valid depends on the policy language, the facts of the loss, and the strength of the causation evidence.

How Does an ACC Clause Work in a Florida Hurricane Damage Claim?

Hurricane claims often involve multiple causes of damage, including wind, wind-driven rain, flooding, and storm surge. A standard property insurance policy may cover windstorm damage but exclude flood or surface water.

After a storm, the insurer may rely on an adjuster or engineer who concludes that flooding or storm surge contributed to the damage. The insurer may then cite the flood exclusion and ACC clause to deny the claim, even when wind caused part of the loss.

Challenging that type of denial usually requires forensic engineering, meteorological data, flood mapping, photographs, repair findings, and expert analysis.

Are Anti-Concurrent Causation Clauses Enforceable Under Florida Law?

Florida courts generally enforce clear and unambiguous ACC clauses when the insurer can prove that an excluded peril contributed to the loss.

However, enforceability is not automatic. An ACC denial may be challenged if the insurer cannot prove the excluded peril caused the specific damage, if the policy language is ambiguous, or if the clause conflicts with other policy provisions.

Every ACC dispute depends on the exact policy wording, the physical evidence, and how Florida law applies to the facts.

What Is the Efficient Proximate Cause Doctrine, And Does It Affect ACC Clauses?

The efficient proximate cause doctrine focuses on the primary cause that set the chain of events in motion. If the initiating cause was a covered peril, such as wind, a policyholder may argue that coverage should apply even if an excluded peril contributed later.

Florida courts recognize the doctrine, but its interaction with ACC language depends heavily on the policy and facts. In many cases, the insurer will argue that the ACC clause overrides the doctrine. Our Florida property insurance attorneys can evaluate whether efficient proximate cause supports coverage in a specific claim.

Can Ambiguous Policy Language Make An ACC Clause Unenforceable?

Yes. Under Florida law, ambiguous insurance policy language is generally interpreted in favor of the policyholder and against the insurer that drafted the policy.

If an ACC clause is unclear, internally inconsistent, or conflicts with other coverage provisions or endorsements, the insurer’s reliance on that clause may be challenged. This is why a complete policy review is critical. The declarations page, exclusions, endorsements, coverage grants, definitions, and conditions all matter.

What Types of Florida Property Claims Often Involve ACC Clause Denials?

ACC clause disputes most often arise in claims involving multiple potential causes of damage, including:

• Hurricane and tropical storm claims involving wind, wind-driven rain, storm surge, or flood
• Water damage claims involving plumbing failures, seepage, groundwater, or surface water
• Foundation and structural claims involving earth movement, soil settlement, subsidence, or sudden covered events
• Mold claims where the insurer argues the damage resulted from long-term moisture rather than a covered water loss

What Evidence Does a Florida Homeowner Need to Challenge a Denial of an ACC Clause?

A successful challenge usually requires evidence showing that a covered peril caused the specific damage, or that the insurer cannot prove an excluded peril contributed.

Important evidence may include forensic engineering reports, meteorological data, flood maps, photographs, videos, repair records, contractor estimates, prior inspection records, and the complete policy with all endorsements.

Timing matters. The longer a policyholder waits, the more likely it becomes that repairs, weather, deterioration, or cleanup will alter the evidence.

Can a Florida Homeowner Recover for Wind Damage When an ACC Clause Is Invoked?

Sometimes. The key question is whether covered wind damage can be separated from excluded flood, storm surge, or surface water damage.

For example, if evidence shows that wind damaged the roof, windows, siding, or exterior envelope before flooding occurred, the policyholder may be able to challenge a full denial. The stronger the damage mapping and expert causation analysis, the stronger the claim.

Insurers often resist separable-damage arguments, which is why these disputes usually require legal and technical review.

Does Citizens Property Insurance Use Anti-Concurrent Causation Clauses?

Yes. Citizens Property Insurance Corporation policies may include anti-concurrent causation language for excluded causes such as flood, storm surge, surface water, and earth movement.

Citizens’ claims have been heavily litigated after major hurricanes in Florida. Courts generally enforce clear ACC language when Citizens can prove that an excluded peril contributed to the loss.

However, every Citizens claim depends on the specific policy form, endorsements, exclusions, dispute-resolution provisions, and the date of loss. Citizens policies are not always identical to private carrier policies, so the exact language matters.

How Does A Florida Property Insurance Attorney Challenge An ACC Clause Denial?

A property insurance attorney starts by reviewing the full policy to determine whether the ACC language is clear, enforceable, and consistent with the rest of the policy. Our attorneys may then build an independent evidentiary record using engineering analysis, weather data, flood information, photographs, contractor estimates, and expert opinions.

That evidence can be used to challenge the denial, submit a demand, pursue litigation, or preserve potential bad faith remedies. If appropriate, the attorney may also file a Civil Remedy Notice under Florida Statute § 624.155, which gives the insurer 60 days to cure before a bad faith action may proceed.

How Long Does a Florida Homeowner Have to Act After an ACC Clause Denial?

Florida property insurance claims are subject to strict deadlines. Under Florida Statute § 627.70132, policyholders generally must report a new property insurance claim within one year of the date of loss and a supplemental or reopened claim within 18 months.

Separate lawsuit deadlines may apply under Florida Statute § 95.11. Because ACC denials often involve complex causation issues and evidence that can disappear quickly, policyholders should act as soon as possible after receiving a denial.

What Should A Florida Homeowner Do After Receiving An ACC Clause Denial?

After receiving an ACC clause denial, a homeowner should preserve the damage, avoid unnecessary permanent repairs before an independent inspection, request a complete certified copy of the policy, keep all claim communications, and avoid accepting a settlement before understanding the full value of the claim.

Most importantly, the homeowner should have a Florida property insurance attorney review the denial, the policy language, and the evidence.

An ACC denial does not always mean the claim is over. It means the insurer has taken a coverage position that should be tested against the policy, the facts, and Florida law.

Get Help With An ACC Clause Denial In Florida

Williams Law Association, P.A. represents Florida homeowners and commercial property owners in anti-concurrent causation disputes, hurricane damage claims, wind-versus-water disputes, and bad faith insurance cases.

Since 1995, our Tampa-based property insurance law firm has fought for Florida policyholders, recovered more than $300 million, and never represented insurance companies.

If your insurer denied, delayed, or underpaid your claim based on an anti-concurrent causation clause, contact Williams Law Association, P.A. for a free consultation. Property insurance claims are handled on a contingency-fee basis with no upfront cost.