Antoinette Hatfield Hall Roof Replacement
Metro (City of Portland)
Carlton Hart Architecture
Roof replacement design & design review, construction administration assistance, quality assurance inspections
OBJECTIVE / BACKGROUND
The Antoinette Hatfield Hall building, located in downtown Portland, is nestled between SW Broadway and the South Park Blocks, just south of the Arlene Schnitzer Concert Hall across SW Main Street. The building, constructed in the mid-1980’s, employs a post-modern design sensibility that responds contextually to the adjacent historic First Congregational United Church of Christ, recognizable by its Venetian Gothic bell tower, and the surrounding urban environment. Currently housing three of the five Portland’5 Center for the Arts theaters for the performing arts, the three-quarter-block building footprint is covered by a combination of steep-slope and low-slope roof types arranged in a complex geometry that results in challenging roof and exterior wall conditions. Following recommendations outlined in a prior roof assessment performed by PRC, Metro planned this roof replacement project to address the expired existing low-slope asphalt built-up membrane roof systems. The project included replacement of failing roof level EIFS wall cladding systems as well as fall-protection and roof access improvements.
STRATEGIES & SERVICES
Carlton Hart Architecture contracted PRC to design and detail systems to be used for roof and EIFS cladding replacement, as well as assist CHA in preparation of construction document drawings and technical specifications. PRC also provided bidding assistance and performed construction administration duties, including review of project submittals, assistance in responding to contractor RFI’s, and quality assurance inspections during installation.
Responding to complex perimeter geometry, existing drain locations, and a flat structural deck, PRC designed a protected membrane assembly (PMA) to cover the majority of the roof area in scope. A conventional roof system insulated above the deck with an exposed membrane was designed to cover the remainder. Both systems utilize a cold fluid-applied membrane. PRC was instrumental in successfully overcoming installation challenges presented during construction on this complex project.