Key Takeaway
Anti-Concurrent Causation (ACC) is a clause in many Texas property policies that says: when an excluded peril (like flood) and a covered peril (like wind) both contribute to a loss, the entire loss is excluded - regardless of which peril struck first or which did more damage. Texas generally follows the doctrine of concurrent causation, under which a policyholder bears the burden of segregating covered from non-covered loss. ACC clauses are common in homeowner and commercial property forms, and Texas courts have generally enforced them - though enforcement is fact-specific and turns on the policy language and the loss sequence. The practical defense is documentation: contemporaneous photos, videos, and contractor records that establish what damage happened, in what order, and from which peril. This is a legal question as well as a claim-handling question. Pair a licensed public adjuster (to document the loss) with a licensed Texas attorney (to interpret the policy). Our line is 833-4UR-LOSS (833-487-5677). Educational only, not legal advice.
The Direct Answer: What ACC Is and Why It Matters
Texas property insurance disputes frequently turn on a single phrase buried in the exclusions section of the policy: "loss caused directly or indirectly by [an excluded peril], regardless of any other cause or event contributing concurrently or in any sequence to the loss, is excluded." That phrasing - or close variations of it - is the Anti-Concurrent Causation clause.
In plain English, the clause is the carrier's answer to a common factual situation: a loss has two causes, one of them covered and one of them excluded, and both contributed to the damage. The clause says the policyholder gets nothing in that situation. Even if the covered peril did 90% of the damage and the excluded peril did 10%, the language attempts to bar the entire claim.
ACC clauses matter most in hurricane claims (wind + flood), water claims (sudden discharge + long-term seepage), fire claims (fire + firefighter water + smoke + ordinance), and any other scenario where multiple perils contribute to the same damage. They are one of the most consequential pieces of policy language a Texas policyholder will ever encounter - and most policyholders only discover them after a denial.
The Texas Concurrent Causation Doctrine in Brief
Texas courts have long applied a doctrine of concurrent causation in property insurance disputes. The basic principle is that an insured can only recover for damage caused by a covered peril - and that the burden of segregating covered loss from non-covered loss falls on the insured. When damage is caused by both covered and excluded perils, the insured must prove what part of the loss is attributable to the covered peril; what cannot be segregated may be denied.
The ACC clause goes a step further than the doctrine: it tries to exclude the entire loss in the both-perils scenario, not just the portion attributable to the excluded peril. Carriers add ACC language to policies precisely to displace the doctrine's default rule (which still allows partial recovery for the segregable covered portion) and replace it with an all-or-nothing exclusion.
Texas courts have generally enforced ACC clauses where the language is clear and the facts fit the clause. Outcomes are fact-specific. Some opinions have applied ACC strictly; others have found that a wind loss complete before a separate flood event arrived was not the type of concurrent loss the clause was designed to exclude. The specific policy language and the specific sequence of events both matter.
The Most Common ACC Scenarios on Texas Claims
Hurricane wind + storm surge. The classic ACC fact pattern. A hurricane strips a roof during the wind phase, then storm surge floods the lower floors. The carrier invokes ACC and argues that because both wind (covered) and flood (excluded) contributed to the overall property damage, the entire loss is excluded. Whether this argument succeeds depends heavily on whether the wind damage can be isolated and timeline-documented as having occurred before the flood arrived. Detailed treatment is in our companion post Wind vs. Flood: How Texas Hurricane Damage Gets Allocated.
Sudden discharge of water + long-term seepage. A burst pipe releases water; an investigation reveals that the same plumbing system had been slowly leaking for weeks before the burst. The carrier argues ACC: the sudden discharge (covered) and the long-term seepage (excluded) both contributed, so the entire loss is excluded. Pre-event maintenance records, plumber receipts, and condition photos become important.
Fire + firefighter water + smoke + code upgrades. Fire is generally covered, smoke is generally covered, water used to suppress fire is generally covered. Code upgrades may be covered only by an Ordinance or Law endorsement. ACC issues arise when an excluded peril (often a faulty workmanship exclusion on the underlying cause) is also present. Less common than wind-flood, but real.
Roof leak + age-related wear. A roof develops a leak after a storm; the carrier argues the leak was actually caused by age-related deterioration rather than the storm, and invokes wear-and-tear exclusions plus ACC. Pre-loss roof inspections and recent maintenance records help.
Earth movement + water. Foundation issues paired with plumbing leaks or flooding. ACC arguments arise when both an excluded peril (earth movement) and a covered peril (sudden water discharge) appear to have contributed. Engineering reports become central.
How to Document a Loss So It Survives an ACC Argument
The practical defense against an ACC argument is contemporaneous documentation that establishes what happened, in what order, and to what specific parts of the property. The single best practice in every category:
Establish a pre-loss baseline. A dated photo and video inventory of the home or business before any loss event is the most powerful single piece of evidence. Without it, the carrier can argue that pre-existing wear, prior damage, or pre-existing deterioration contributed to the loss - and ACC may then attach.
Document the sequence. Timestamped photos and videos taken during and immediately after the event matter enormously. A photo of a destroyed roof during the wind phase of a hurricane - before storm surge arrives - is the cleanest possible proof of a wind-first sequence. Photos of a dry basement before a burst pipe and a flooded basement after isolate the sudden discharge from any prior seepage.
Isolate the damage by peril. The high-water mark on a wall isolates flood damage from wind damage above the line. Soot patterns isolate fire damage from water damage. The direction of impact damage isolates wind-borne debris from waterborne debris. Photographs that capture these distinctions support the segregation analysis a Texas court will perform if the dispute escalates.
Pre-loss maintenance records. For water and roof claims especially, plumber receipts, roof inspections, HVAC service records, and prior repair invoices defeat the carrier's argument that long-term wear (excluded) contributed. Keep these records off-site and dated.
Independent engineering and contractor reports. When a carrier produces an engineering report attributing damage to an excluded peril, a competing report from a qualified independent engineer or contractor is often the decisive evidence. A public adjuster coordinates this; an attorney admits it.
When an ACC Argument Becomes a Legal Question - Not a Claim-Handling Question
There is a clear line in an ACC dispute beyond which the question stops being about claim-handling and starts being about policy interpretation, which is a legal question. A public adjuster documents the loss and negotiates the settlement; a public adjuster does not give legal opinions on policy interpretation.
Signs that an ACC dispute has crossed into legal territory include: the carrier has issued a written denial citing the ACC clause; the carrier has produced an engineering report attributing damage to an excluded peril; the dispute has continued past 60-90 days without movement; the carrier is invoking other litigated exclusions (faulty workmanship, wear and tear, earth movement, settlement) alongside ACC. At this point a licensed Texas attorney with first-party property experience should be consulted.
In our practice, the best outcomes on contested ACC claims come from early collaboration between the public adjuster and the attorney. The public adjuster does the documentation, the scoping, and the negotiation with the desk adjuster; the attorney interprets the policy, advises on the legal posture, and (if necessary) pursues litigation. Each plays a different role; both add value at different stages.
The Public Adjuster's Role in an ACC-Threatened Claim
A licensed public adjuster on an ACC-threatened claim does five things that make a real difference:
- Reads the policy - including all endorsements and exclusions - and identifies the specific ACC language and any related exclusions the carrier is likely to invoke.
- Documents the loss thoroughly - room by room, system by system - with photos, videos, measurements, and contractor input that supports segregation of covered from non-covered damage.
- Builds a line-item scope in the same software the carrier uses (Xactimate), so the settlement conversation happens on shared terms.
- Coordinates independent engineering or expert reports when the carrier produces a report attributing damage to an excluded peril.
- Negotiates with the carrier from a documented position - and recognizes when the dispute has crossed into legal territory and refers to a licensed attorney.
There is no charge to talk. In Texas, public adjuster fees are capped by statute at 10% of the recovery (Texas Insurance Code Chapter 4102). In Florida, fees are capped at 10% during a declared state of emergency for the first year after the disaster and 20% for non-emergency claims (Florida Statutes Section 626.854). If we cannot increase the carrier's offer, there is no fee.
If you are facing an ACC argument right now, call us. The earlier in the dispute we are involved, the more documentation we can preserve. Our 24/7 storm line is 833-4UR-LOSS (833-487-5677).
Pro Tip
When a carrier denies a claim on ACC grounds, the denial letter itself is a critical document. Read it carefully. The specific exclusions cited, the specific causal language used, and the specific evidence referenced will shape both the public adjuster's response and any subsequent legal analysis. Save the letter, save the carrier's engineering report (if any), and save any correspondence that preceded the denial. These are the foundation of the response.
Frequently Asked Questions
What is anti-concurrent causation in plain English?
Anti-Concurrent Causation (ACC) is a clause in many Texas property policies that says: when an excluded peril and a covered peril both contribute to a loss, the entire loss is excluded - regardless of which peril struck first or which did most of the damage. Example: a hurricane strips your roof (wind, covered) and then storm surge floods the house (flood, excluded). Under an ACC clause, the carrier may argue the entire loss is excluded because both wind and flood contributed.
Why do insurance policies include ACC clauses?
Texas courts have long applied a doctrine of concurrent causation under which an insured can recover for the segregable portion of a loss caused by a covered peril, even when an excluded peril also contributed. Carriers add ACC language to displace that doctrine and replace it with an all-or-nothing exclusion in the both-perils scenario. The clause is designed to limit the carrier's exposure when multiple perils contribute to the same damage.
Have Texas courts upheld ACC clauses?
Generally, yes - Texas courts have enforced ACC clauses where the policy language is clear and the facts fit the clause. Enforcement is fact-specific. Some opinions have applied ACC strictly to bar entire claims; others have found that a covered loss complete before a separate excluded event arrived was not the type of concurrent loss the clause was designed to exclude. The specific policy language and the documented sequence of events both matter. This is a legal question that should be addressed with a licensed Texas attorney for any specific claim.
How does ACC apply to a hurricane wind + flood claim?
In the classic hurricane scenario, wind damage (covered by homeowner or TWIA) and storm surge / flood damage (excluded by homeowner and TWIA, covered only by NFIP or private flood) both contribute to the same property loss. A carrier may invoke ACC to argue that because both perils contributed, the entire loss is excluded under the wind policy. The strongest defense is contemporaneous documentation that establishes wind damage that was complete or substantially complete before the storm surge arrived - which may support an argument that the wind loss is independent of the flood loss. Detailed treatment is in our companion post Wind vs. Flood: How Texas Hurricane Damage Gets Allocated.
How does ACC apply to a water-damage claim with a long-term leak history?
A common ACC scenario in plumbing claims: a sudden burst pipe (covered) causes water damage, but investigation reveals that the same system had been slowly leaking for weeks before the burst (excluded as long-term seepage). The carrier may invoke ACC to argue that because both the sudden event and the long-term seepage contributed, the entire loss is excluded. Pre-event maintenance records, dated plumber receipts, and pre-event condition photos help establish the sudden event as the operative cause.
Can I avoid an ACC clause by choosing a different policy?
Sometimes - ACC language varies in scope and clarity across carriers and policy forms. A pre-loss policy audit can identify whether the language is present, how broadly it is written, and whether the same coverage is available without ACC from a different carrier. There is no charge for a policy audit by our office. We are not a substitute for your agent; we are a second set of eyes that has read thousands of these policies through the lens of claim disputes.
Do I need a lawyer for an ACC dispute?
If the carrier has issued a written denial citing the ACC clause, has produced an engineering report attributing damage to an excluded peril, or has continued to dispute the claim past 60-90 days without movement, the question has crossed into legal territory and a licensed Texas attorney with first-party property experience should be consulted. A public adjuster documents the loss and negotiates the settlement; a public adjuster does not give legal opinions on policy interpretation. The best outcomes in our practice come from early collaboration between the public adjuster and the attorney - each plays a different role.
What is the role of a public adjuster on an ACC-threatened claim?
A public adjuster on an ACC-threatened claim reads the policy, documents the loss with the level of detail required to segregate covered from non-covered damage, builds the Xactimate scope, coordinates independent engineering or expert reports when needed, and negotiates with the carrier from a documented position. We work on contingency (Texas 10%, Florida 10%/20% per statute) - no recovery means no fee. There is no charge to talk: 833-4UR-LOSS (833-487-5677).
