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Court overturns Travelers' $5k microbe sublimit on sewer-backup coverage dispute

Travelers' sublimit just lost its absolute power. Here's what that means

Legal Insights

By Matthew Sellers

Nov 25, 2025Share

On November 21, 2025, the Illinois Appellate Court ruled Travelers' $5k microbe sublimit cannot automatically block broader sewer-backup coverage claims.

In July 2017, raw sewage backed up into the basement of Jeffery and Michele Schaff's Lake Forest home. When they returned on July 27, they discovered that an operating HVAC system had aerosolized the sewage, spreading bacteria throughout the residence. Travelers responded by paying approximately $155,000 in claims: $36,824.34 for dwelling damage, $96,658.22 for personal property replacement, and $21,935.12 in temporary housing costs.

ServPro was brought in to perform remediation. The Schaffs signed an authorization with ServPro on July 29, 2017. Dissatisfied with the results, the homeowners sued Travelers, ServPro (G.W. Nitzsche, Inc., d/b/a ServPro of Wheaton/Glen Ellyn) and their insurance agent, Hub International Midwest, Ltd., alleging inadequate remediation, broader property loss and deceptive practices.

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The dispute turned on two policy provisions. Additional Coverage 22 (AC 22), the water‑back‑up endorsement, provides up to the Coverage A and C limits for “direct physical loss” caused by “water or water‑borne material” that backs up from a sewer. Additional Coverage 20 (AC 20) is a limited “Fungi, Other Microbes or Rot Remediation” endorsement that pays remediation costs when a covered peril “results in” microbes, but caps that remediation at $5,000. Travelers argued AC 20 controlled remediation of any microbe‑related loss; the Schaffs contended that sewage and sewage‑borne bacteria qualify as “water‑borne material” under AC 22 and could therefore implicate full policy limits.

The appellate court declined to adopt the trial court’s ruling that the microbe sublimit necessarily precluded any AC 22 recovery. The panel observed that the insurer could have drafted AC 20 to expressly displace AC 22 or defined “water‑borne material” to exclude microbes, but the policy did not do so. Because factual questions remain about whether the bacteria were still “water‑borne” (for example, present in droplets or mist) or were purely airborne, the court reversed summary judgment to Travelers on the breach‑of‑contract issue and remanded the coverage dispute for further proceedings. In short: a microbe sublimit in AC 20 does not automatically extinguish AC 22 coverage where factual and expert evidence might show direct physical loss from water‑borne material.

At the same time, the appellate court affirmed several rulings favorable to Travelers and the agent. It upheld dismissal of the homeowners’ section 155 claim, finding a bona fide coverage dispute existed. The court also affirmed summary judgment for Travelers on respondeat superior, noting there was no evidence Travelers controlled ServPro’s work. Claims against Hub International for breach of fiduciary duty, negligence and consumer‑fraud theories were likewise dismissed or affirmed, consistent with statutory limits on producer liability.

ServPro’s position fared less well. The court reversed dismissals of the homeowners’ negligence and Consumer Fraud Act claims against ServPro and reversed summary judgment on ServPro’s counterclaim for unpaid invoices. The panel found triable issues over whether the homeowners signed ServPro’s authorization under duress and whether remediation met professional standards. Because the authorization’s enforceability is in doubt, the court also indicated the plaintiffs’ jury demand should be reinstated.

For insurance professionals, one thing is certain: endorsement clarity matters. If carriers intend a microbe sublimit to be the exclusive remedy for contamination tied to sewage, that intent should be explicit and reconciled with water‑back‑up language. For claims operations, thorough documentation and early, defensible testing will be crucial when contamination pathways involve HVAC systems. For contractors, how on‑site authorizations are presented and how inventories are documented can become central litigation points. The case now returns to the trial court for fact‑finding on causation, mitigation and damages.

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