Bonsecours Market, Envelope Restoration

Client: City of Montreal

Location: 350 St Paul St E, Old Montreal, QC

Year of project completion: 2005

The 1847 Bonsecours Market is an iconic heritage landmark in Montreal’s Old Port. During its long history, this neoclassical building has been successively occupied by a market, a police station, a cultural centre, and municipal offices.

In 1990 the interior was remodeled to revive its original commercial function. Our mandate for this 165-metre-long building with its 6968 square metre metal roof was the exterior limestone masonry restoration, including window repairs and in a second phase, the replacement of the existing metal roof including the roof structure reinforcement.

Based on a comprehensive condition survey and historic research, a program was implemented to preserve and restore the masonry and rebuild such missing elements as the exterior west stone stair. For weather tightness, deteriorated stone elements were reconstructed with new stone to resolve envelope performance problems. The metal roof was rebuilt with 21st-century technology, to retain the original appearance, with improved performance.

Client: City of Montreal

Location: 350 St Paul St E, Old Montreal, QC

Year of project completion: 2005

The 1847 Bonsecours Market is an iconic heritage landmark in Montreal’s Old Port. During its long history, this neoclassical building has been successively occupied by a market, a police station, a cultural centre, and municipal offices.

In 1990 the interior was remodeled to revive its original commercial function. Our mandate for this 165-metre-long building with its 6968 square metre metal roof was the exterior limestone masonry restoration, including window repairs and in a second phase, the replacement of the existing metal roof including the roof structure reinforcement.

Based on a comprehensive condition survey and historic research, a program was implemented to preserve and restore the masonry and rebuild such missing elements as the exterior west stone stair. For weather tightness, deteriorated stone elements were reconstructed with new stone to resolve envelope performance problems. The metal roof was rebuilt with 21st-century technology, to retain the original appearance, with improved performance.

All the old paint was stripped, the rotten or damaged wood elements replaced and an opaque stain was applied. The city’s coat of arms was dismantled and restored in a workshop. The original colours proposed in 1833 by Jacques Viger, the first mayor of Montreal, were reapplied.

About eighteen thousand cut stones were examined, one by one, to determine the required intervention: repairing superficial cracks; reuniting cracked stones; partially or completely replacing damaged stones; reshaping missing parts of the stones; stabilizing parts of the masonry with stainless steel anchors; disassembling and rebuilding displaced parts of the wall, etc.

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