Anti-Concurrent/Sequential Causation Clauses Defeat Coverage When Wear-and-Tear Contributes and the Insured Lacks Expert Rebuttal

1. Introduction

Case: Riya Dev Corp. v. Amguard Insurance Co. (3d Cir. June 26, 2026).
Parties: Riya Dev Corp., doing business as Hallmark Inn (insured motel owner), vs. AmGUARD Insurance Co. (property insurer).
Context: Riya Dev owned and operated a New Jersey motel insured under an all-risk businessowner policy. The roof had long-standing deterioration and evidence of multiple repairs predating Hurricane Ida. After Ida, Riya Dev sought coverage for roof damage; AmGUARD denied, attributing the loss to wear-and-tear/deterioration rather than a sudden storm event.

Key issues:

• How burden allocation operates in an all-risk claim when the insurer invokes exclusions for wear-and-tear/deterioration/long-term seepage.
• How anti-concurrent and anti-sequential causation clauses affect coverage when both covered (wind) and excluded (deterioration) causes may contribute.
• What evidentiary showing—particularly expert proof—is required to create a triable dispute on causation at summary judgment.

2. Summary of the Opinion

The Third Circuit affirmed summary judgment for AmGUARD. Even assuming the claim initially fit within the policy’s broad all-risk grant (i.e., a “fortuitous” loss), AmGUARD carried its burden to show the claimed roof damage fell within exclusions for wear-and-tear/deterioration (and related conditions) and that the policy’s anti-concurrent/anti-sequential causation language barred coverage so long as an excluded cause “contributed to” the loss.

Two engineering assessments (including one following Ida) identified age-related deterioration and prior repairs—sagging, worn shingles, corroded nail pops, advanced deterioration of wood cladding, cracking, patching, and sealant layers—with no persuasive indicia of a discrete, one-time wind or hail event as the cause. Once AmGUARD made that showing, Riya Dev failed to raise a genuine dispute that Hurricane Ida was the sole cause of the roof damage. The insured’s expert did not adequately grapple with or negate age-related deterioration as a contributing cause. Lay materials (an adjuster’s report and underwriting-related points) were not a substitute for expert causation evidence.

The panel also warned appellant’s counsel for submitting an opening brief that was largely recycled from a motion below, citing Conboy v. U.S. Small Bus. Admin.

3. Analysis

3.1. Precedents Cited

• Tundo v. County of Passaic, 923 F.3d 283 (3d Cir. 2019)
  Used for the appellate standard of review: summary judgment is reviewed de novo. This frames the decision as a fresh look at whether the record contains a triable dispute on causation.
• Princeton Ins. Co. v. Chunmuang, 698 A.2d 9 (N.J. 1997)
  Cited for the core New Jersey allocation rule: once coverage is triggered, “the burden is on the insurer to bring the case within the exclusion.” The panel accepted that structure but found AmGUARD met it through engineering evidence of deterioration/wear-and-tear.
• Simonetti v. Selective Ins. Co., 859 A.2d 694 (N.J. Super. Ct. App. Div. 2004)
  Central comparator case invoked by both sides. The Third Circuit acknowledged Simonetti as reflecting New Jersey’s willingness (absent limiting policy language) to allow recovery where a covered peril “simultaneously or sequentially” causes damage with an excluded peril. But the panel distinguished Simonetti on two grounds: (i) evidentiary posture (in Simonetti, the insured had expert support attributing intrusion to construction workmanship) and (ii) policy language (Riya Dev’s policy contained anti-concurrent/anti-sequential causation clauses; the opinion notes Simonetti’s policy did not).
• Mac Prop. Grp. LLC & The Cake Boutique LLC v. Selective Fire & Cas. Ins. Co., 278 A.3d 272 (N.J. Super. Ct. App. Div. 2022)
  Supplies the operative causation threshold under anti-concurrent/anti-sequential language as applied in New Jersey: the insurer satisfies its burden when it shows an excluded cause “contributed to” the property damage. This case anchors the panel’s move away from parsing “predominant” cause; contribution is enough when the policy so provides.
• Matsushita Elec. Indus. Co. v. Zenith Radio Corp., 475 U.S. 574 (1986)
  Cited for the summary-judgment burden shift: once the moving party supports its position, the nonmovant must offer “specific evidence” of a genuine dispute. Here, after AmGUARD’s engineering proofs, Riya Dev needed record evidence capable of supporting a finding that Ida alone caused the loss (given the anti-concurrent/anti-sequential clause).
• Torres v. Schripps, Inc., 776 A.2d 915 (N.J. Super. Ct. App. Div. 2001)
  Used for the proposition that certain causation questions require expert testimony to be intelligible to a jury. The panel applied that logic to roof-causation in a deteriorated structure subjected to storms: without a competent expert who engages the deterioration evidence, a jury would be left to speculation.
• Sky Harbor Atlanta Ne., LLC v. Affiliated FM Ins. Co., 2024 WL 4370727 (11th Cir. Oct. 2, 2024)
  Cited as an “unpublished, non-New-Jersey-law” per curiam offered by Riya Dev. The Third Circuit distinguished it on its facts (pre-purchase experts reportedly found no major defects/maintenance issues), highlighting the factual centrality of documented pre-loss deterioration.
• Conboy v. U.S. Small Bus. Admin., 992 F.3d 153 (3d Cir. 2021)
  Cited in the court’s admonition to counsel: extensive copy-and-paste recycling in an appellate brief can reflect “dereliction of duty.” While not merits-related, it signals the court’s expectation of tailored appellate advocacy.

Appendix-only authorities (quoted from appellant’s recycled argument): The opinion reproduces, but does not itself rely on, citations including Brindley v. Firemen's Ins. Co. of Newark, N.J., Newman v. Great Am. Ins. Co., Franklin Packaging Co. v. Cal. Union Ins. Co., Stone v. Royal Ins. Co., Ariston Airline Catering Supply Co., Inc. v. Forbes, and general causation-jury cases (Verdicchio v. Ricca, Scafidi v. Seiler, Kulas v. Pub. Serv. Elec. & Gas Co.). Their appearance underscores the insured’s preferred doctrinal frame (proximate cause / “Appleman’s Rule”), but the panel’s operative analysis turned on the policy’s anti-concurrent/anti-sequential clause and the insured’s failure to rebut contribution by excluded causes.

3.2. Legal Reasoning

A. Starting point: all-risk coverage and the insurer’s exclusion burden

The panel framed the case within standard all-risk architecture: if the loss is “fortuitous,” coverage is broadly granted; the insurer must then prove an exclusion applies. Relying on Princeton Ins. Co. v. Chunmuang, the court accepted that AmGUARD bore the burden to show wear-and-tear/deterioration/long-term seepage exclusions applied.

B. The decisive policy feature: anti-concurrent and anti-sequential causation language

The policy excluded loss “caused directly or indirectly” by wear-and-tear/deterioration (and certain water conditions) and applied those exclusions “regardless of any other cause or event [Hurricane Ida] that contribute[d] concurrently or in any sequence to the loss.”

This clause materially changes the causation inquiry. Instead of asking whether a covered peril was the “predominant” or “efficient proximate” cause, the question becomes whether an excluded cause contributed at all. Under Mac Prop. Grp. LLC & The Cake Boutique LLC v. Selective Fire & Cas. Ins. Co., contribution by an excluded cause suffices to trigger the exclusion when the policy contains such language.

C. Application to the evidence: AmGUARD showed contribution by excluded causes

The panel credited multiple strands of record evidence supporting deterioration/wear-and-tear as a contributing (indeed, primary) cause: long-standing poor roof condition, limited repairs, photos showing damage including exposed wood, and engineering findings after the relevant storms describing age-related deterioration and repairs/patching.

The court emphasized the 2021 post-Ida engineering conclusion that there was no persuasive evidence of a one-time wind event or hail impact sufficient to explain the loss, while there was ample evidence of general shingle wear, sunlight-related blistering, patching, and susceptibility to lower winds due to age.

D. Burden shift at summary judgment: the insured needed a real expert rebuttal

Once AmGUARD supported application of the exclusions, Matsushita Elec. Indus. Co. v. Zenith Radio Corp. required Riya Dev to produce specific evidence creating a genuine dispute. Because the policy barred coverage if excluded causes contributed, Riya Dev needed evidence capable of supporting a finding that Ida was the sole cause of the claimed damage.

The court concluded that a jury could not resolve that technical causation question without competent expert testimony (citing Torres v. Schripps, Inc.). Riya Dev’s engineer did not meaningfully address why observed deterioration was not at least partly responsible, leaving AmGUARD’s expert evidence unrebutted on the contribution point. Lay materials (adjuster/underwriting points) were deemed inadequate substitutes for expert causation proof.

E. Distinguishing Simonetti v. Selective Ins. Co.

The panel rejected the insured’s effort to analogize Simonetti into a “jury question” mandate. It distinguished Simonetti because (1) the evidentiary record there included expert attribution supportive of coverage, and (2) Riya Dev’s policy contained anti-concurrent/anti-sequential causation clauses—language the panel noted was not present in Simonetti. Thus, even if New Jersey law can allow partial recovery in mixed-cause scenarios, the contract here foreclosed that route once an excluded cause contributed.

3.3. Impact

• Contracts can override mixed-cause allocation. For New Jersey property disputes, this decision reinforces that anti-concurrent/anti-sequential causation clauses can eliminate partial-recovery arguments in storm-plus-deterioration cases, shifting the litigation to whether the excluded cause contributed at all.
• Expert engagement must be targeted. It is not enough for an insured’s expert to opine generally that a storm caused damage; the expert must specifically confront and negate deterioration/wear-and-tear contribution where the policy makes any contribution outcome-dispositive.
• “Maintenance history” becomes a central battleground. The opinion elevates the evidentiary importance of pre-loss photos, prior claims, and engineering findings demonstrating long-term roof decline. Insureds should expect insurers to use these materials to establish “contribution” by excluded causes.
• Procedural discipline matters. The court’s separate admonition under Conboy v. U.S. Small Bus. Admin. signals that appellate briefing quality can draw judicial scrutiny even when it does not change the merits outcome.

4. Complex Concepts Simplified

• All-risk coverage: A policy form that generally covers accidental or fortuitous physical loss unless the insurer proves an exclusion applies.
• Fortuitous loss: A loss that is accidental/unexpected rather than inevitable from ordinary aging or known deterioration.
• Wear-and-tear / deterioration exclusions: Common provisions excluding losses arising from normal aging, deferred maintenance, or gradual decay (as opposed to sudden external events).
• Anti-concurrent causation clause: A provision stating that if an excluded peril contributes to the loss at the same time as a covered peril, the exclusion still applies.
• Anti-sequential causation clause: A provision stating that if an excluded peril contributes anywhere in the chain of events (before or after a covered peril), the exclusion still applies.
• Summary judgment: A pretrial ruling where the court decides there is no genuine dispute of material fact requiring a jury; under Matsushita Elec. Indus. Co. v. Zenith Radio Corp., the nonmovant must respond with specific evidence, not speculation.
• Why experts mattered here: Distinguishing storm-created damage from long-term deterioration in a repaired, aging roof is technical. The court treated that as beyond ordinary juror experience (citing Torres v. Schripps, Inc.).

5. Conclusion

Riya Dev Corp. v. Amguard Insurance Co. illustrates a practical rule for property-coverage litigation under New Jersey principles when the policy contains anti-concurrent/anti-sequential causation language: once an insurer produces competent evidence that wear-and-tear or deterioration contributed to the claimed loss, the insured must rebut that contribution with specific, technically grounded expert proof—or risk summary judgment. The decision’s broader significance lies less in novel doctrine than in its clear synthesis of (i) exclusion burdens, (ii) the contractual power of anti-concurrent/anti-sequential clauses, and (iii) the evidentiary necessity of expert causation analysis in storm-versus-deferred-maintenance disputes.