THE ONLY SOURCE FOR PROFESSIONAL ICI ROOFING CONTRACTORS IN ONTARIO ORN 14  ONTARIO ROOFING NEWS – WINTER 2018/19 2018 Roofing Canada Award AFlowing, UndulatingRoof W hile every finalist for CRCA’s 2018 Roofing Canada Award deserves recognition, it was OIRCA member Bothwell Accurate’s work on the York University Station that landed the Mississauga- based company in the winner’s seat. The project was commissioned by the Toronto Transit Commission and included the construction of a 12,270-square-foot roof over one of the new transit stations along the city’s Toronto-York Spadina Sub- way Extension. The roof is unique for both its inverted design and its flowing compound curves that con- nect to an undulating perimeter gutter system, giving the subway hub a distinctly modern appearance. “You don’t come across free-form roofs like this every day,” says Trevor McGrath, estimating man- ager with Bothwell Accurate. “Usually, you can measure off a drawing and determine how much pe- rimeter fascia or insulation you’ll need upfront, but it wasn’t that cut and dried with this building. We needed to work with people who had done this type of curved roof before and who understood what needed to be done.” Bothwell Accurate recruited Radius Track Corporation (RTC) and Soprema to its team, as well as U.K.-based Kalzip, a roofing manufacturing firm that had experience with roofs of this nature overseas and could supply the custom-made standing seam roofing needed for the project. Long-distance Collaboration Once the steel deck was installed, the company began its work with a full 3D scan of the roof to locate the roof deck and assess its as-built condition. These drawings were shared and discussed with the part- ners, including Kalzip’s designers who worked remotely from England. “This process pinpointed areas where the red-iron structure was not able to maintain tolerance due to the complex geometric design,” ex- plains McGrath. “To bridge the gap from roof deck to smooth finished metal roof, BA (Bothwell Accurate) engaged RTC to design, engineer and fabricate a light-gauge framing system using the 3D scan and other project documents and information.” Bothwell Accurate’s in-house team was then tasked with delivering the roof. It installed the sheathing board and two-ply modified bitu- minous roof while RTC designed and manufactured the light-gauge framing required to install Kalzip’s curved standing seam metal roof over the two-ply system. The RTC system began with a hat channel BothwellAccurategetstophonoursforits inspiringworkonYorkUniversityStation The Bothwell team with its 2018 Roofing Canada Award. By Matthew Bradford