The six-story hotel also houses a one-story conference center at the south end. Shortly after construction, hotel personnel observed leaks at several locations. The original contractor asked SGH to investigate the leaks, develop a repair plan, and oversee repairs.
SGH investigated the reported leakage and collaborated with the contractor to develop a repair plan that could be implemented while the building remained occupied. Highlights of our repair design include the following:
- Installing flashing and interior louver waterproofing without removing the existing windows or louvers
- Installing pan flashing below the curtain wall by lowering the front edge of the sill to create the necessary slope for drainage
- Developing details to integrate the weather barrier between adjacent walls systems
- Adding through-wall flashing at the roof line and where a low roof meets a rising wall
We performed confirmation testing to verify repairs successfully addressed the issues.
Repair & Rehabilitation
The Weitz Company, LLC
Condition Assessments | Roofing & Waterproofing
Key team members
Northwestern Mutual Tower Mat Foundation
SGH assisted the construction team by analyzing the mass concrete mix design, evaluating placement conditions, and developing a cooling system that allowed CGS to successfully place the mass concrete mat foundation.
Cook County Administration Building
SGH evaluated the impact of malfunctioning smoke louvers that were part of the smokeproof enclosure system for the exit stairway, and provided expert opinions on the conditions that led to the fatalities as a result of the fire.