Founded in 1820, Knox
Presbyterian Church was the original Presbyterian congregation in
Toronto (York). From modest beginnings, the Church moved to a site on
Queen Street at Yonge. They occupied this building from 1848 to 1905,
when they acquired their current downtown property on Spadina Avenue at
Harbord. The Sunday School "School House" was constructed
first, beginning in 1905, while the Sanctuary opened for it's first
service in 1909. In the spring of 1993, George Robb Architect was retained
to undertake a building condition study for the Knox Presbyterian Church.
The report was commisioned to provide the Church with a factual base on which
to establish a long term maintenance strategy. This reflected an increasing awareness
within the congragation of their responsibilities for stewardship of this important
1909 stone structure.
Initially, the
building was evaluated for compliance with regard to the Ontario
Building Code, the Ontario Fire Code and other municipal requirements.
Areas of non-compliance with contemporary standards of life safety and
barrier free accessibility were identified and possible solutions
proposed.To evaluate the building's condition, a team was assembled that
included not only the traditional disciplines of structural, mechanical,
and electrical engineering, but specialist consultant /contractors in
the fields of asbestos removal, roofing, stained glass conservation,
organ maintenance, and general building and masonry conservation.
Together, this team evaluated all aspects
of the building fabric as to their present condition, and in each case,
developed strategies to deal with immediately required repair and/or
long term maintenance.The final report, completed in July 1993,
concluded with a schedule of Required Maintenance, extrapolated over a
twenty year period, and provided a Reserve Fund Study that identified
the assigned cost of the recommended programme for yearly maintenance.
Phase One
The Board of Managers of the Church
accepted the principles contained in the report and, in 1994, the first
year's programme was undertaken. Several "life safety" issues
were given priority along with the conservation of some stained glass
units found to be in poor condition. As well, asbestos was completely
removed from the building, exit routes were improved, and previously
scheduled roof repairs were undertaken.
The original report had raised serious
concerns with regard to the condition of the stone masonry itself. As
previous efforts at re-pointing with cement mortars were suspected of
accelerating the deterioration of the combination sandstone and cut
limestone wall structure, a more detailed investigation followed.
Walls at high levels were
examined with the assistance of a crane equipped with a "man
basket". John Carr, a Pennsylvania masonry conservator, was
retained to examine the wall, test mortar samples for condition and
composition, and to generally comment on the condition of the wall.
After this investigation, a separate Masonry Report was prepared.
Phase Two
Phase Two continued the various
prioritized repairs such as stained glass conservation, painting, roof
repairs, mechanical up-grades, etc... In addition, based on the Masonry
Report, the restoration of the most critical area requiring re-pointing
was undertaken. Contemporary masonry conservation techniques require
cutting the joints by hand, and replacing the existing mortar with a
lime based mortar to replicate the original mix. Hard cement based
mortars used in the early seventies had caused significant damage to the
original stone. The repointing process is labour intensive, and this,
combined with the scaffolding cost, had made it paramount that the work
be broken down into cost effective and affordable "packages".This
first package re-pointed 1750 square feet of the south transept, at a
cost of approximately $90,000.
Phase Three
Phase Three (1996) continued the masonry
re-pointing with a similarly sized project. Roofing and carpentry
repairs to the roof edge in this area were scheduled to maximize the
usefulness of the scaffolding, once erected. The single most critical
structural failure identified by the original report had also occurred
in this area. The scaffold acted as temporary shoring while a section of
wall was rebuilt, several rafters replaced, and a sound structure
restored.
Phase Four
To this point, average annual maintenance
costs were scheduled at approximately $150,000. However, on the basis of
the consultant teams annual evaluation, it appeared that the
deterioration of the Bell Tower masonry was accelerating more quickly
than had been first anticipated. It was agreed that this work,
originally scheduled for 1997-1998,
should proceed immediately in the current programme.
The Tower has now been re-pointed and
stabilized internally with additional steel lateral bracing, and the
copper roof has been replaced. Original (1909) wood louvres have been
conserved, where possible, and replaced in other areas. Discrete lead
flashings were formed and beat into place on stone moldings identified
as contributing to water penetration into the stone. On the interior of
the Tower, stairs and handrails were added to provide a contemporary
level of safety for future maintenance.The Church is committed to the
maintenance of their building. Plans for Year Four are underway. While
it may appear that there are never sufficient funds, the original
building report has provided a framework for budgeting essential
maintenance and a review procedure for re-assessing goals that will
conserve this building for many years to come.
Owner:Knox Presbyterian Church
Architect:George Robb Architect; Donald Scott, Peter Stewart
Structural:Alan Zeegen Associates
Electrical:LKM & Partners Inc.
General Contractor DJ McRae Contracting Ltd.
Roofing:Britannia Roofing Limited
Asbestos Removal:DCS Limited
Painting & Timber Conservation:
Terry Helmer, Restoration & Decorative Painting
Specialists:John Carr, Masonry Conservator
Keith Blades, Masonry Conservator
Robert McCausland Ltd., stained glass
Alan T. Jackson & Co. Ltd., organ
Building Area:57,000 SF
Project Cost:$2,700,000