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
Project Summary
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
Northeast
One Cambridge Place
The project, which would provide CDM with parking for 235 cars and 160,000 sq ft of office space, needed a compressed design and construction schedule. SGH designed the new nine-story structure in time to obtain building permit sixty days after the initiation of design.
Northeast
100 Binney Street
The ten-story building at 100 Binney offers attractive, leasable space to the tech and biotech companies moving into the growing Kendall Square area.