The retrofit of the Windmill Line Co-operative building in the heart of Toronto’s St. Lawrence Market neighborhood involved the occupied replacement of the 1970s-era windows that had gone beyond their useful life and were showing signs of water infiltration and poor thermal performance.

The goal of the project was to give the tenants of the 206 mixed-income apartments high performance windows to allow a more comfortable living environment, reduce operating costs for the co-op and refresh the exterior appearance of the building.

Read the full Case Study to see how the project team brought this building to today’s thermal performance standards.