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| PROJECT: |
Notre-Dame Basilica |
| LOCATION: |
Montreal, Quebec |
| APPLICATION: |
Roof Restoration |
| ARCHITECT: |
Faucher Aubertin Brodeur Gauthier, Montreal, Quebec |
| CONTRACTOR: |
Les Couvertures St-Léonard, Montreal, Quebec |
| METAL SUPPLIER: |
Canadian Brass & Copper, Concord, Ontario |
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DESCRIPTION: |
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As any visitor to Montreal will attest, Notre-Dame Basilica in
Old Montreal is one of that City’s most notable landmarks, dominating
the Place d’Armes with its boxy façade and twin bell towers. The
huge cathedral, seating up to 9,000 worshippers, was designed
by American architect James O’Donnell who was based in New York.
Construction began in 1824, and the towers were completed by John
Ostell in 1841, after O’Donnell’s death.
The most recent restoration addressed some notable details, such
as the flat seam cladding used for sides of the large dormers
and the detailed counter-flashings that were required between
the stonework and the roof. Also unique to this project is the
way that the roof steps down into three segments, essentially
three separate roofs. Another feature is the series of skylights
that run along the 240-foot (73 m) ridge of the Basilica. On the
80-foot (24 m) sloped sections, the batten-seam copper roof was
installed using 8-foot (2.4 m) long pans, 18 inches (450 mm) wide.
It was installed over a fir plywood deck and a Roofshield™ membrane.
Approximately 65,000 pounds (29,500 kgs) of sheet copper was needed
for the project. The roof pans are 16-oz. copper, while the flashings
are 20-oz. Also Architectural Bronze (Alloy C38500) extrusions
were used to fabricate the snowguards.
™ Trademark
Adapted from Canadian Copper, No. 152.
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