A collapsed floor in a restaurant was found to be covered. J&J Fish on Center Street, Inc. v. Crum & Forster Spec. Ins. Co., 2022 U.S. Dist. LEXIS 163661 (D. Wis. Sept. 12, 2022).

J&J Fish rented property from Vision. Vision was obligated to keep the premises insured under an all-risk policy. Vision was also responsible for maintaining and repairing the property "including the slab flooring exterior walls of the premises." Vision never obtained insurance on the building, but J&J Fish secured a commercial property policy from Crum & Forster.

On May 29, 2020, approximately 25% of the building's slab floor, the section beneath the walk-in cooler, collapsed into the crawl space below. Dr. Daniel Wojnowski inspected the crawl space and observed overall dampness as well as a pool of water in the space. He concluded that the collapse occurred because the steel support beams and steel elements of the floor corroded after prolonged exposure to moisture. Based on this report, Crum & Forster denied coverage. J&J Fish sued and the parties moved for summary judgment.