APT Canada proudly presents:

Canada Symposium

June 8, 2023 6pm - 8pm ET

There will be 6 speakers covering 4 topics about the unique challenges of Canadian Preservation.

Dealy Island Revisited: conservation in the High Arctic and a tribute to Martin Weaver (Abstract)
Robert G. Lemon, B.Arch/MA - Retired Architect AIBC

Robert Lemon Consulting Inc. 

Adaptive reuse of an 1864 textile mill using historical research on the design intent of trussed-beam components and in-situ testing for a structural capacity assessment. (Abstract)
Arlin Otto, M.Eng, P.Eng CAHP - Structural Engineer, Associate

Tacoma Engineers

De-constructing Heritage: Enhancing value through salvage and reconstruction (Abstract)
Emad Ghattas, OAA, MRAIC, CAHP - Senior Associate

GBCA Architects

Donovan Pauly, MSc CAHP - Conservator / Project Coordinator
Clifford Restoration

Montreal Christ Church Cathedral - Industrial Revolution in the Service of Religious Heritage (Abstract)
Lise Desardin - Associate Architect & Evan Eichenbaum - Intern Architect

EVOQ Architecture

Regular Non-Members - $65
APT Members - $45
Emerging Professionals (APT Members) - $20
Students (APT Members & Non-Members) - $20

(Please note that these prices are in US Dollars.)

Register Here


Speaker Bios:

Robert G. Lemon, B.Arch/MA
Retired Architect AIBC
Robert Lemon Consulting Inc.

Over his four decade career, Robert Lemon has many award winning rehabilitation projects, including his own work as a heritage consultant to other firms. He has been Senior Heritage Planner for the City of Vancouver, work that oversaw new heritage legislation, transfer of density policy, the inclusion of modern heritage buildings, landscapes and interiors. He is a past board member of APT and established a BC Chapter of APT in the 1990s. He has chaired sessions at many APT conferences. His memoir: "Address Book' the places that shaped a career" will be published by ORO Edition in fall 2022 

Emad Ghattas, OAA, MRAIC, CAHP
Senior Associate

GBCA Architects

Emad Ghattas, OAA, MRAIC holds a B.Sc. (Arch) from McGill University (2009) and an M.Arch from the University of Waterloo (2013). Emad assists and advises owners with their permit applications involving the conservation of heritage resources integrated into large mixed-use developments, preparing assessment reports and coordinating with other consultants to completion of projects. He works in collaboration with owners and municipal authorities to secure the necessary heritage approvals up to project completion. Emad also conducts site visits to review building conservation work in compliance with approved documents and permits. He is fully fluent in French and English 

Donovan Pauly, MSc CAHP
Conservator / Project Coordinator

Clifford Restoration Limited

With over 35 years in the building and conservation industries and a commitment to lifetime learning and professional development, Donovan continues to be involved in unique and innovative projects in the building conservation/ preservation industry. Mr Pauly completed the Heritage and Traditional Masonry program at Algonquin College (Ontario, Canada) in 1994 and went to work on important architectural conservation and masonry projects in Ontario. After completing a Master of Science Degree in Architectural Materials Conservation in the UK (2000-2004), Donovan was employed by prominent UK conservation firms St. Blaise Conservation and Stonewest Ltd. Donovan worked on many important historic structures over almost a decade in the UK.

Donovan is currently employed as Architectural Conservator/ Project Coordinator for Clifford Restoration Limited (masonry and conservation contractor) in the Toronto area working in Canada and the United States. Donovan is also a lecturer at Willowbank School and a past Board member and Committee chair (2014-18) of CAHP (the Canadian Association of Heritage Professionals) and continues to be active within CAHP as a long-term member of the Membership Committee.

Current work encompasses masonry and associated materials conservation, conservation of architectural metals, sculpture, as well as staff training and consultation. 

Arlin Otto, M.Eng, P.Eng, CAHP
Structural Engineer, Associate

Tacoma Engineers, Canada

Arlin Otto is a structural engineer specializing in restoration, adaptive reuse and rehabilitation work across South-Western Ontario. She completed her bachelor’s degree in architectural conservation and sustainability engineering at Carleton University and her master of engineering graduate degree at the University of Waterloo with a focus on structural engineering and fire safety engineering. She has been part of the heritage and investigation team at Tacoma Engineers since 2017. Arlin has a keen interest in post disaster and forensic assessments of structures. She is an active supporter of the Architectural Conservatory of Ontario (ACO) and is on the Board of Directors of APT.

Lise Desjardins
Associate Architect

EVOQ Architecture, Canada

Lise Desjardins is an associate at EVOQ Architecture and has a much broader field of expertise than architecture. She has a bachelor's degree in engineering and worked in that field before pursuing her education and career in architecture. This dual training has made her well versed in many aspects of construction. She applies her knowledge as a professor of architectural technology at Collège Montmorency.

Evan Eichenbaum
Intern Architect

EVOQ Architecture

After completing his Bachelor of Science in Architecture (B. Sc. (Arch)) at McGill University, Evan Eichenbaum joined EVOQ Architecture in 2018 and worked as an architecture student during a gap-year between his studies. After returning to McGill University and completing his Professional Master of Architecture (M. Arch.), Evan rejoined EVOQ Architecture in 2021 as an intern architect. His passion towards heritage conservation, adaptive reuse and sustainability has guided Evan to approach architecture with a sensitivity towards built heritage and surrounding urban development.


Dealy Island Revisited: conservation in the High Arctic and a tribute to Martin Weaver

Living in a tent on that desolate island in the Canadian High Arctic for the Dealy Island Archaeological Project would be my summer job in 1978. This paper describes that experience, working in an arctic marine environment with my mentor Martin Weaver. It is drawn from one chapter in my memoir “An Architect’s address Book – the places that shaped a career”.
Kellett’s Storehouse is a stone cache of goods and supplies built in 1853 related to the Franklin expedition. It is now an historic site and had suffered badly from vandalism, freeze-thaw decay, polar bear pilferage and souvenir hunters.
Martin Weaver was one of organizers of the Dealy Island Project and invited me to join the team as the photographer. Martin also introduced me to APT.
Up on Dealy Island, my role was to record the progress of the archaeological dig at Kellett’s Storehouse. The archaeologists would recover samples of historic artefacts to be conserved on site. The objects, including bits of blue serge uniforms, rifles, leather boots, cast iron stoves, bags of coal and some of the thousands of cans of food, would be handed to the two conservators to record, treat and pack in their working tent.
I was taught scaled-rectified photography by the experts at the Restoration Services. The stone walls of the building were recorded using a Super Cambo 4X5 camera with a 135mm lens. The archaeologists’ work of removing layers of artefacts was recorded from above with a camera was hoisted up a Whittlesey Foundation Bipod thirty feet high over the site. The daily temperature was usually six to eight degrees Celsius, with a very high relative humidity of 70 to 80 percent which affected the film and equipment.
On a recent trip to Ottawa, I was allowed to see some of the artefacts that were removed from Dealy Island in 1978. In 2016, 941 of the artefacts collected during that summer were shipped from Yellowknife to a conservation facility in Gatineau Quebec, near Ottawa. There in a box marked “978.35 Dealy Island”, was a rusted but unopened can with an intact paper label that read “Tripe and Onions preserved by Jackson Hogarth & Co. Aberdeen.”
I looked up tributes to Martin Weaver after he died in 2004. The obituary in the New York Times barely touches on the extent of his achievements in the field of conservation worldwide. I remember him as a gifted and animated man, eager to tackle any conservation challenge. I learned a lot from him.

Learning Objectives:

  • Understand conservation challenges in an arctic marine environment
  • Learn of recording techniques used four decades ago
  • Learn about Canadian history an exploration in the High Arctic
  • Reflect on the importance of a mentor in one's career in preservation

    Adaptive reuse of an 1864 textile mill using historical research on the design intent of trussed-beam components and in-situ testing for a structural capacity assessment.

South-Western Ontario, like Detroit, Michigan, possesses a large inventory of industrial heritage with near endless adaptive reuse potential. For many early settlements, a mill or other industrialization efforts employed and advanced the communities and their associated economies. These buildings were built before community centres or places of faith as they provided immediate revenue to the community. Such buildings are typically adjacent to waterways and rail lines to facilitate early electrification efforts and provide ease of access to industrial processes.
Mills and other early industrial buildings contain key features of a promising redevelopment including easy access to the city centre and transportation, access to water and green space, and adaptable open-concept structures. Industrial themed lofts, condominiums and co-working office spaces remain prolific in 2022. This presents an opportunity for retention of unique heritage features while meeting densification targets for housing and the modern needs of the working professional.
The challenge then falls to the structural engineer to help justify the requirements from the change of use of the structure from the building code (in this case the Ontario Building Code) whilst leveraging the existing capacity of the structure. This is key step in lowering the cost of any adaptive reuse undertaking. While the code requirements for a change of use define the loading relatively clearly, the calculated capacity of the structure is not always so straightforward when reviewing 100+ year old materials and archaic systems that do not fall in readily available design standards. This case study explores a heritage textile mill (circa 1864) in Cambridge, Ontario (formerly Hespler Village) on the banks of the Grand River and the structural capacity assessment untaken to review feasibility of a commercial and then a subsequent residential development. The presentation will specifically review how an in-house literature review uncovered historical standards from the time of construction which informed the gravity structural capacity assessment. This literature review was in response to a need to better understand the trussed-beam floor framing that previously supported weaving machines in the mill. Another technique employed on this project was the use of in-situ timber grading to leverage increased capacities as outlined in the Canadian Wood Design Manual (CSA O86-14). This case study will review the value of having a structural engineer during the feasibility stage of a project to help leverage existing capacity of unique structural systems. It will also review in-situ testing options available to inform the structural capacity analysis.

Learning Objectives:

  • Upon completion, a participant will be able to identify trussed-beam assemblies and the different components / materials
  • Upon completion, a participant will be able to understand some of the limitations of working with existing timber (ungraded) using the Canadian Wood Design Manual (CSA O86)
  • Upon completion, a participant will be able to identify in-situ testing options to support steel and timber testing.
  • Upon completion, a participant will be able to identify the role of a structural engineer at the feasibility stage of an adaptive reuse project

De-constructing Heritage: Enhancing value through salvage and reconstruction.

It is now well known that intensification of urban sites is, generally speaking, logical, appropriate and - given the current housing crises faced by many cities - necessary. First-rate, high calibre “Grade A” heritage buildings, easily recognized by the ordinary person, are usually left untouched and protected from high-rise development pressures. Modest and less obvious sites of heritage interest, scattered in urban areas targeted for growth represent a challenge as they are considered to hold less “importance” with respect to the land value on which intensification is a desired outcome. In this case, unfortunately, not all heritage buildings are perceived equally. This is particularly true for Toronto, the city with the most high-rises under construction in North America.
Architectural conservation encourages full building retention. While it is always defended in the interests of good standards of practice, it is too often not possible in the quest of integrating new design parameters for project achievability. Forcing this goal on challenging sites may push the heritage architect out of the design team where the heritage building is put at risk. Architects who practice heritage conservation should be welcome team players in those large high-rise development projects as they can advise on strategies to conserve cultural heritage value, some of which may seem unconventional.

This presentation demonstrates an example of a balance between heritage conservation and intensification, where the strategy used for the heritage building is deconstruction, salvage, and reconstruction The Silver Dollar Room is a modest, single-storey mid-century musical performance space, where its value was primarily historical and associative, rather than architectural. It was carefully demolished to make way for a new 14 storey residential development, where the Silver Dollar Room would be integrated in a reconstructed state. Significant attributes (interior painted murals, a wood bar and the large exterior neon signage) were salvaged, restored and reinstated in a meticulously recreated building. Modest interior features that were overlooked (terrazzo flooring) were salvaged and saved from landfill, in a manner that can contribute to the new space’s interpretation and value, tangible in the visible differences between old and new that conserved heritage character and made it physically accessible to a more diverse public. This project is now completed and is awaiting a new tenant that will help revive its value as a musical performance space.

Learning Objectives:

  • Appreciate how reconstruction can help re-assess heritage value in applicable projects.
  • Highlight challenges and other lessons learned in deconstruction projects
  • Define what makes an element of heritage value in a deconstruction perspective
  • Understand salvageability in a material, from various points of view

Montreal Christ Church Cathedral - Industrial Revolution in the Service of Religious Heritage

Designed in the neo-gothic style by English architect Frank Wills, the Montreal Christ Church Cathedral was built between 1857-59. Today, it is located atop piers with a shopping center carved out beneath it in the downtown core and is designated both provincially (1988) and federal (1999) as a historic place in Quebec and Canada. Following his death, his colleague Thomas S. Scott presided over the work. The cathedral conforms to the architectural principles advocated by the Camden Society of Cambridge, which heavily influenced Anglican religious architecture in the region. The predominantly stone building has a cruciform plan with aisles, ending with a flat choir. It has a straight gabled roof and a square tower topped by a 318-foot spire, which marks the transept crossing.

In 1927, the stone spire – an original character defining element – was dismantled when the supporting masonry base began to sink under the tremendous loads. Rebuilding the spire while preserving its structural and historical integrity presented an exceptional challenge. It was only 10 years later when architects Ross and MacDonald were commissioned to rebuild the iconic masonry spire. The pair followed Wills’ original design; however, instead of the heavy stone they opted for a lightweight steel structure and pre-cast aluminum panels that imitate the texture and look of the former stone spire. While Detroit became a hub for industrialization in the 1920s, similar changes were occurring in Montreal, including the rise of the Dominion Bridge Company, specialized in lightweight steel skeletons. New materials incorporated in the spire were an industry favorite throughout the 1940s, yet rarely applied in the context of religious, historic architecture. The long-lasting and lightweight qualities of these materials were used to preserve the unique features of the cathedral. The aluminum panels were cast in moulds formed from the dismantled stonework and were subjected to a chemical treatment which dulled the reflective surface of the metal, resulting in a stone-like patina that is still visible today.

The complex challenge of rebuilding the spire fuelled the process of ingenuity required to arrive at the imaginative possibilities of using new materials and processes that were considered avant-garde at that time. Though the pre-cast panels performed well over the last 75 years, the lightweight steel structure requires rehabilitation. In consequence, EVOQ was mandated in 2017 to preserve the spire. Both modernist technologies of the past and advanced technologies of the present acted as key elements in the planning, execution, and construction phases of the project. For that reason, this presentation will concentrate on the historical manufacturing processes and materials of the spire’s construction, and their impact on the preservation of the spire, focusing particularly on the cleaning methods, as well as reparation and restoration strategies.

Learning Objectives:

  • learn about the innovative material (cast aluminum) featured in this project during the late 1930s and early 1940s.
  • compare the various restoration and conservation techniques possible for this type of modern material.
  • understand the use of industrial materials in more traditional building contexts such as religious buildings.
  • identify solutions developed at the time that allowed for taller buildings with lighter and less expensive structures.