Rideau Hall Front Façade Restoration
Ottawa, Ontario

Overview

This award-winning project involved the restoration of three wings of Rideau Hall, the official residence of the Governor General; the 1913 Mappin Wing, the Ballroom and the Tentroom Wings. The Rideau Hall complex has one of the highest heritage ratings of any property in the country.

Robertson Martin Architects was Prime Consultant during construction for this highly complex and challenging project. In addition to various pre-planning studies, investigations and contract documents, the work involved the integration of four concurrent conservation and rehabilitation projects, (in concert with the work of Fournier Gersovitz Moss and PTAH Consultants) addressing heritage envelope work, as well as integration of new HVAC and finishes within multiple office floors. During the course of the project, additional emergency structural work was identified and integrated into the schedule.


Rideau Hall Front Façade Restoration
Ottawa, Ontario

Details

Complete roofing rehabilitation included a purpose-designed new thermal envelope, ventilation, restructuring of roof framing for new built-in gutters, and roof anchors. Copper roofing needed to respond to complex geometries, site conditions, and to improve moisture shedding and connections with masonry. Various moisture management systems included guttering, diverters, heat tracing, bronze snow guards and down pipes.

In addition to extensive masonry repair, repointing, cleaning and stone conservation, the deterioration of the limestone walls, due to the erosion of clay deposits within the stone itself and poor envelope detailing, required the filling in/consolidation of voids in the stones and, in some cases, the sculpting and replacement of new decorative stone elements. RMA was responsible for the extensive onsite tracking of stone conservation efforts and developed an innovative management and costing monitoring method that allowed all parties to participate fairly and responsibly.

Air Conditioning was introduced to the building interior in the Mappin Wing and Ballroom Wing in an artful and inconspicuous manner, while preserving heritage fabric and introducing discreet penetrations through the roof. This required close coordination between all consultant disciplines and with the contractor and trades during the progress of work.


Rideau Hall Front Façade Restoration
Ottawa, Ontario

Goals / Challenges

  • A project of this scale and complexity required the expertise, coordination and collaborative efforts of a large number of trades, consultants and client representatives.
  • Working on such an important heritage asset required a delicate balance between preserving the integrity of heritage fabric while upgrading structural deficiencies, building envelope detailing, and occupant comfort.
  • Additional masonry deterioration and deficiencies were uncovered as the project progressed and required emergency masonry structural works to stabilize. This required timely redesign and specification efforts so as to minimize impact to project schedule.
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