The Ohio Court of Appeals determined that the CGL policy was ambiguous as to whether a subcontractor's faulty workmanship was an "occurrence." Ohio N. Univ. v. Charles Constr. Serv., 2017 Ohio App. LEXIS 258 (Ohio Ct. App. Jan. 23, 2017).

In 2007, Ohio Northern University (ONU) entered a contract with Charles Construction Services, Inc. (CCS) to construct a hotel on the campus. In 2011, the building was completed, but ONU found water intrusion and moisture damage in the interior. When remediating the water damage, ONU found additional, serious structural defects.

ONU sued CCS, alleging breach of contract, breach of express warranty, and negligent misrepresentation. CCS filed a third-party action against many of its subcontractors. Cincinnati Insurance Company (CIC) intervened and filed a cross-claim for a declaratory judgment that it had no duty to provide coverage to CCS. CIC and ONU filed cross motions for summary judgment.