How do siding, masonry, stucco, and EIFS work together in a building envelope?

Many commercial buildings use multiple exterior materials. The transitions between siding, masonry, stucco, and EIFS must be properly detailed to manage water, movement, and weather exposure. Deteriorated mortar, failed sealants, damaged flashing, or cracks at these interfaces can contribute to moisture problems. Coordinating repairs across these systems can help support more effective building envelope restoration.