The Michigan Supreme Court held that under a CGL policy, an "accident" may include unintentional subcontractor work that damages the insured's work product. Skanska USA Building Inc. v. M.A.P. Mechanical Contractors, Inc., et al., 2020 Mich. LEXIS 1194 (Mich. June 29, 2020).
Skanska USA Building Inc. was the construction manager on a renovation project for a medical centre. The heatng and cooling portion of the project was subcontracted to M.A.P. Mechanical Contractors, Inc. (MAP). MAP installed a steam builder and piping for the heating system. The installation included several expansion joints. After completion, Skanska learned that MAP had installed some of the expansion joints backward. This caused significant damage to concrete, steel and the heating system. The medical center sent a demand letter to Skanska, who send a demand letter to MAP. Skanska did the repairs and replacement of the damaged property. Skanska then submitted a claim of $1.4 million for its work to Amerisure Insurance Company. The claim was denied.