General Guidelines for Preservation, Rehabilitation and Restoration Recommended
Not Recommended
1
Understanding the materials that comprise the historic place and how they contribute to its heritage value.
2
Documenting all interventions that affect materials, and ensuring that the documentation is available to those responsible for future interventions.
3
Determining the appropriate level of investigation required to understand the properties and overall condition of the material.
Failing to undertake an appropriate level of investigation and analysis before identifying the level of conservation work required.
4
Assessing materials fully to understand condition, evolution over time, deterioration and mechanical and chemical properties. This should be done early in the planning process so that the scope of work is based on current conditions.
Carrying out a level of conservation work that exceeds what is required, or taking action based on assumptions or rules of thumb. Failing to assess the impact of maintenance practices on materials. Failing to consider the relationship between materials and adjacent elements as a source of deterioration.
5
Testing and examining materials and coatings to determine their properties and causes of deterioration, damage or distress, through investigation, monitoring and minimally invasive or non-destructive testing techniques.
Using highly destructive probing or sampling techniques that damage or destroy materials. Undertaking work without understanding the mechanical and chemical properties of the material. Carrying out a repair that does not treat or address the cause of the problem.
6
Testing proposed interventions to establish appropriate replacement materials, quality of workmanship and methodology. This can include reviewing samples, testing products, methods or assemblies, or creating a mock-up. Testing should be carried out under the same conditions as the proposed intervention.
7
Maintaining materials on a regular basis, as described in the relevant material subsection.
8
Carrying out regular monitoring and inspections of materials to proactively determine the type and frequency of maintenance required.
9
Developing a maintenance plan, where appropriate, that includes schedules for monitoring and inspection.
Failing to adequately maintain materials, or carrying out maintenance on an ad-hoc basis.
standards and guidelines for the conservation of historic places in canada
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