Like many hospital complexes, St. Michael Hospital in Milwaukee is a campus of numerous buildings and additions built over several decades. One such addition, built in 1973, was clad with precast concrete spandrel panels and 31,000 square feet of prepanelized brick infill panels. When the brick panel failed, the hospital sought to replace the failed system with one that maintained the original appearance, corrected the performance problems, and avoided disrupting the occupants as much as possible. The original brick panels were constructed using a high-bond mortar additive that eliminated the need for the separate steel or concrete masonry backup found in conventional brick construction. Each panel had four vertical steel rods at the bottom to connect to the supporting precast spandrel. Over time, the mortar additive released chlorides that attacked the steel rods and anchor bolts embedded in the brick. As these steel components corroded, they increased in size, exerting expansive forces on the brick, which caused the brick to crack at these locations. Demolishing the existing brick panels and replacing them with field-laid brick proved to be the best solution. Brick was used to retain the quality appearance of the building. To promote longevity and weathertightness, full-size rather than thin brick units were used.