Cambridge, MA
Twenty|20 at 20 Child Street
Scope/Solutions
Leading the development at East Cambridge’s NorthPoint site, Twenty|20 brings 355 apartment units to the growing neighborhood. The building also offers 8,600 sq ft of retail space and numerous amenities, including patios, an event room, a fitness center with a yoga terrace, an indoor basketball half-court, a courtyard lounge, landscape plaza areas, and underground parking. The nearly full-story glazing maximizes the great city views. SGH consulted on the building enclosure design.
SGH consulted on the design of the building enclosure, including below- and above-grade waterproofing, roofing, opaque cladding, and glazed systems. Highlights of our work included the following:
- Reviewed the building enclosure design, featuring a sloped terrace with a hardscaped and vegetated stairway, long flanged strip-windows fabricated from curtain wall and corrugated metal panels, a green roof, a courtyard with private terraces and fire pit, and a roof deck
- Recommended ways to improve performance and developed details to integrate the various building enclosure systems
- Observed construction of a two-story wall mockup and recommended ways to improve construction sequencing, material compatibility, and constructability
- Provided construction administration services, including reviewing contractor submittals and visiting the site to observe ongoing construction to compare with design intent
- Oversaw an extensive quality control water testing program and helped the contractor resolve field issues
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Project Summary
2015
Completion Date
Solutions
New Construction
Services
Building Enclosures
Markets
Commercial | Residential | Mixed-Use
Client(s)
CBT Architects
Specialized Capabilities
Facades & Glazing | Roofing & Waterproofing
Key team members
Additional Projects
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New Hampshire State House
The monumental dome on the New Hampshire State House is gilded in gold leaf. After regilding in the early 1990s, the gold leaf started discoloring. SGH investigated the discoloration and subsequently worked on the regilding project.
Northeast
Stop & Shop
Shop & Stop Store #505 is a one-story building constructed with a rooftop parking deck. SGH evaluated the condition of the traffic coating, the roof structure, and the exterior building walls, which were also covered with a failing elastomeric coating.