450 Water Street

SGH collaborated with the project team on the building enclosure design, bidding and design-assist process, and construction. Highlights of our work include:

• Consulting on below-grade and podium waterproofing, roofing, and facade systems, including custom unitized and stick-built curtain walls, metal panel cladding, and louvers
• Developing details for complex conditions, such as waterproofing interfaces with the adjacent building, the building foundation, and site structures; expansion joints at existing pedestrian and vehicular structures; and roofing and curtain walls intersections
• Assisting with the design for the custom curtain wall assembly with integrated metal panel elements that vary throughout the facade to maximize daylighting
• Visiting the curtain wall fabricator to observe their construction quality control processes
• Consulting on a curtain wall performance mockup and witnessing laboratory testing
• Developing the basis of design for the lobby enclosure, comprising a custom long-span, steel-tee curtain wall system, and performing thermal modeling finite element analysis to evaluate the condensation potential
• Reviewing tenant-specific work affecting the building enclosure
• Providing construction phase services, including reviewing contractor submittals, visiting the site to observe ongoing construction, and helping address field conditions
• Helping detail and perform quality reviews of below-grade waterproofing installation
• Performing air/water infiltration testing of the curtain walls and infrared thermal surveys of the completed enclosure to qualitatively evaluate potential air leakage and identify wet materials in the installed roofing assemblies