Train Shed Roof Revitalization

The restoration of the train shed roof (the roof covering the passenger platforms and tracks) is a major component of the Union Station renewal project. The objective is to restore the east and west portions of the shed totalling 30,000 square metres (300,000 square feet) and to replace the central 5,000 square metres (50,000 square feet) of the train shed with a large glass atrium. The train shed is a designated heritage structure, so we worked with Parks Canada in the overall design, ensuring that the heritage character will be preserved.

The glass atrium will float over the tracks, providing daylight at platform level and a visual connection from the station to the waterfront. The view of the roof, which is visible from offices and other tall buildings in the area, will be improved by a green roof, and photovoltaics (solar cells) will also be added. These changes will help reduce the “heat island” effect that raises temperatures in urban areas, reduce the concentration of rainwater run-off, and generate electricity to offset the needs of the station.

The work is expected to take five years. We will restore, repair and renovate all elements from the top of the roof down to track level, including:

• Replacing the roofing material, improving drainage, and waterproofing.
• Cleaning and repairing the steel structure.
• Replacing the tracks. We will take tracks out of service two at a time, as well as the platform between them. Construction zones will be closed off to separate them from passenger areas.
• Replacing the waterproof membrane at track level to prevent leakage to the concourse below.
• Replacing all of the old wiring and much of the public communications equipment including the loudspeakers, signs, and lights.
• Stair enclosures will be upgraded to glass structures, except at Platform 12/13 where heritage features will be carefully restored to original finish.
• Ten new elevators will be installed on the west side of the shed once the new York Street GO Concourse is completed by the city. (City forecast 2013)
• An additional two elevators will be added on mid east side of shed. (City forecast 2014-2015)

Overall Target Completion Date: 2015

STATUS

• Construction started January 11, 2010.