San Francisco, CA

The Avery, Transbay Block 8, 400-450 Folsom Street


Located on Block 8 in the Transbay Redevelopment District, the mixed-use development at 400 Folsom Street includes a fifty‑five‑story tower and two low-rise buildings designed by the executive architecture team of Office for Metropolitan Architecture and Fougeron Architecture. Together, the tower, clad with crenelated curtain wall, and the adjacent seven- and ten-story brick-clad buildings, house a total of 548 condominium and apartment units. Residents enjoy many amenities, such as an indoor pool, lounges, fitness center, podium terraces designed for entertaining, and below-grade parking. SGH consulted on the building enclosure design.

SGH assisted HKS Architects, the architect of record, with the design of waterproofing, exterior wall and glazing systems, and roofing.

Highlights of our work include:

  • Reviewing the building enclosure design for airtightness, watertightness, thermal performance, condensation resistance, and constructability, and recommending ways to improve performance
  • Assisting with the design of roofing and below-grade, plaza, and terrace waterproofing by helping select systems and developing details to integrate the various assemblies with each other and with other building enclosure systems
  • Helping detail ribbon windows and brick veneer cladding and their transitions for the low-rise buildings
  • Consulting on the tower’s curtain wall assembly, including developing a performance-based specification, helping the owner select a manufacturer, reviewing performance mockup shop drawings, collaborating with the manufacturer to help them modify certain elements to improve durability, visiting the plant to review the fabrication process for the performance mockup units, witnessing assembly and testing of the performance mockup
  • Providing construction phase services, including reviewing cladding and waterproofing shop drawings, observing ongoing construction, and witnessing field testing, and helping the contractor address field condition

Project Summary



Completion Date


Construction Value


New Construction
Building Enclosures
Commercial | Residential | Mixed-Use
The Related Companies
Specialized Capabilities
Facades & Glazing | Roofing & Waterproofing

Key team members

Xiu Li
Xiu Li
Senior Project Manager
Craig Allender
Craig Allender
Building Technology Division Head, San Francisco Bay Area