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Project Details

601 Congress

Location: South Boston, MA
Completion Date: 2004
Size: 27,200 sqft.
Market Sector: Office
New Construction: Yes

Project Team

Owner: Manulife Financial Real Estate Division
Architect: Skidmore Owings & Merrill, LLP
Landscape Designer: Sasaki Associates, Inc
Contractor: Clark / Suffolk JV

Product Info

Garden Roof
Garden Roof Type: Intensive
Garden Roof Size: 10,400 sqft.
Products: LiteTop
Ultimate Assembly

Award Winning

Awards Won: 2006 Green Roofs for Healthy Cities - Intensive Industrial/Commercial Award of Excellence

Additional Details

The 14-story Manulife Building houses the U.S. operations of Canada's largest life insurance company. Designed by Skidmore, Owings & Merrill, LLP (SOM) and completed in 2004, the 470,000 square foot building has added a contemporary profile to South Boston's emerging Seaport District and visibly promotes excellence in sustainable design.

The building is stepped at the 12th floor, leaving an open roof area with direct access from adjacent offices and visibility from the floors above. On that 12th floor space, SOM and landscape architect Sasaki Boston have created a beautiful 11,000 square foot garden roof that not only provides a valuable amenity for Manulife employees, it also helps to reduce heating and cooling costs; provides acoustic insulation; greatly extends the roof's life expectancy; reduces the urban "heat island effect;" and provides an effective filtering and retention system for stormwater.

Using drought tolerant ornamental grasses and perennials of varying heights planted in the roof garden's 6" - 14" deep soil media, Sasaki has created a landscape pattern of colors and textures designed to give the appearance of "wind-blown drifts set directly against a cloud-scattered sky."

SOM specified Hydrotech's Garden Roof® Assembly, consisting of MM6125®-EV fabric-reinforced, hot fluid applied, rubberized asphalt waterproof membrane integrated with LiteTop®engineered soil and precast concrete pavers. Hydrotech's unique ability to provide a waterproofing and hardscape/softscape solution, all with a single source warranty, allowed project designers to successfully transform the Manulife Building roof into a self-sustaining landscaped ecosystem that requires minimal maintenance.

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