Façade Retention
Structures: Façade Retention
When redeveloping sites that have existing buildings, the historical character of the site can be maintained by preserving the exterior walls of the original building(s) and integrating them into the new development. Cities change over time and new demands arise for larger and higher-density buildings, but these needs can be met without sacrificing the individual character of distinct neighbourhoods. We designed one of Toronto’s first façade retention projects in the 1980s, at 36 Toronto Street, and have continued with this project type ever since. Our experienced engineers advise on the procedure that suits the unique needs of each project.
Façade Retention
Methods
Several options exist to safely retain a façade during construction of a new building. One of the most common is to build a truss structure out of steel framing, which stabilizes the facade in position, while the remainder of the existing building is demolished and the new structure is built. Alternatively, the façade may be partially dismantled into modular panels, stored off-site, and reassembled once the new structure is complete. In some extreme cases, the façade is completely dismantled and rebuilt brick by brick over the new structure.
Façade Retention
Every Façade is Different
The exact procedure for each façade retention project relies on factors that are unique for every building, such as the material composition and current condition of the façade. Detailed surveys and structural evaluations are required to determine whether the façade can be kept safely in place during the stages of demolition and construction. In most retention projects the façade becomes a non load-bearing element that is supported by the new structure and can safely remain for years to come.
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