Photo by Tim Griffith


University of California, Boalt Hall Infill Addition

Berkeley, CA


Ratcliff Architects




2012 New Landmark Libraries - Academic Winner, Library Journal
University of California, Boalt Hall Infill Addition

Photo by Tim Griffith

University of California, Boalt Hall Infill Addition

Photo by Tim Griffith

University of California, Boalt Hall Infill Addition

Rendering by Ratcliff Architects

The infill addition to the Boalt Hall School of Law offers 54,000 sq ft in a three-story structure. Because the new addition houses a large law library with document storage on two below-grade levels, the structure has zero tolerance for water ingress. SGH was the building enclosure design consultant responsible for waterproofing the addition to the library.

Scope | Solutions

The lowest two floors lie 40 ft below grade and partly below the water table, resulting. In contrast, the single above-ground level includes an 8,250 sq ft glass-and-metal enclosure with a landscaped roof deck. The new addition is connected to the existing building through a three-sided glass enclosure and students can use a pedestrian bridge from the roof deck. Ground-level glass skylights in the courtyards support pedestrian traffic and create a light-filled reading area in the room below. These design features created significant dampproofing and waterproofing challenges. SGH design the waterproofing for the entire building enclosure and as part of this project, we:

  • Designed the below-grade waterproofing, which includes a backup water collection and drainage system

  • Specified and assisted with implementation of an off-the-shelf glass enclosure system for three walls and the roof over the lobby

  • Designed waterproofing and expansion joints for the footbridge

  • Detailed six ground-level glass skylights

  • Inspected and monitored installation of waterproofing

  • Peer reviewed construction plans, checked construction documents, evaluated and responded to bidder submittals, and monitored construction

Project Contact(s)