St. Michael's Cathedral Exterior Envelope & Tower

Between 2010 and 2017, +VG Architects undertook a comprehensive, phased building envelope conservation program as part of the broader Master Plan for St. Michael’s Cathedral, a landmark 1847 Gothic Revival building in Toronto.

The work addressed all exterior systems, including slate roofing, brick and sandstone masonry, metalwork, wood windows, and structural elements.

Beginning with the West Façade and Tower, the project progressed methodically around the building. Initial investigations included detailed surveying, testing, and analysis to define the scope of conservation. As work advanced, further assessments from scaffolding informed case-by-case decisions for appropriate repair and intervention strategies. Particular care was taken in the conservation of intricate carved sandstone elements, which required fine cleaning, consolidation, and localized repair.

Structural stabilization was a key component, including reinforcement of original timber framing and high-level masonry features such as pinnacles, crosses, and cornice stones. Where necessary, lost or severely deteriorated elements were restored, including portions of the Upper Tower and the reintroduction of historically appropriate slate roofing patterns.

The project required close collaboration with conservators, engineers, and specialized trades to address unforeseen conditions while maintaining rigorous conservation standards. The work aligns with Parks Canada guidelines and has received multiple heritage awards, recognizing its contribution to the long-term preservation of this significant cultural landmark.