Abstract: At 4:45 p.m. on February 6, 2018, Employee #1, employed by a construction company, was working at a multiemployer building construction project. He was standing tied off on the building's first-story roof, which had a pitch of 1 to 12. Employee #1 leaned against a second-story wall that was wrapped in Tyvek. An open window in the wall was covered in Tyvek, and the opening was not apparent. Employee #1 fell through the Tyvek-covered, unguarded window. Emergency services were called, and Employee #1 was transported to the hospital. He was admitted and treated for two fractured vertebrae in his neck, a fractured eye socket, and a head injury.