Standards For Preservation

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Standards for Preservation

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1. A property will be used as it was historically, or be given a new use that maximises the retention of distinctive materials, features, spaces, and spatial relationships.

Where a treatment and use have not been identified, a property will be protected and, if necessary, stabilised until additional work may be undertaken.

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2. The historic character of a property will be retained and preserved. The replacement of historic materials or alteration of features, spaces, and spatial relationships that characterise a property will be avoided.

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3. Each property will be recognized as a physical record of its time, place, and use.

Work needed to stabilize, consolidate, and conserve existing historic materials and features will be physically and visually compatible, identifiable upon close inspection, and properly documented for future research.

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4. Changes to a property that have acquired historic significance in their own right will be retained and preserved.

5. Distinctive materials, features, finishes, and construction techniques or examples of craftsmanship that characterise a property will be preserved.

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6. The existing condition of historic features will be evaluated to determine the appropriate level of intervention needed.

Where the severity of deterioration requires repair or limited replacement of a distinctive feature, the new material will match the old in composition, design, colour, and texture.

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7. Chemical or physical treatments, if appropriate, will be undertaken using the gentlest means possible.

Treatments that cause damage to historic materials will not be used.

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8. Archaeological resources will be protected and preserved in place. If such resources must be disturbed,mitigation measures will be undertaken.

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Guidelines for Preserving Historic Buildings

In Preservation, the options for replacement are less extensive than in the treatment, Rehabilitation.

The goal is retention of the building’s existing form, features and detailing.

So, Protection, maintenance, and repair are emphasised while the replacement is minimised.

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Step 1:

Identify, Retain, and Preserve Historic Materials and Features

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Identify the form and detailing of those architectural materials and features that are important in defining the building’s historic character and which must be retained in order to preserve that character.

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The character of a historic building is the form and detailing of exterior materials, interior materials, and interior features, as well as structural and mechanical systems and the building’s site and setting.

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Step 2:

Stabilise Deteriorated Historic Materials and Features as a Preliminary Measure

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Deteriorated portions of a historic building may need to be protected through preliminary stabilisation measures until additional work can be undertaken.

Stabilising may include structural reinforcement, weatherization, or correcting unsafe conditions

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Step 3:

Protect and Maintain Historic Materials and Features

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Protecting and maintaining those materials and features that are important and must be retained is the process of Preservation.

Protection generally involves the least degree of intervention and is preparatory to other work.

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Step 4:

Repair (Stabilize, Consolidate, and Conserve) Historic Materials and Features

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When the physical condition of character-defining materials and features requires additional work, repairing by stabilising, consolidating, and conserving is recommended.

All work should be physically and visually compatible,identifiable upon close inspection and documented for future research.

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Step 5:

Limited Replacement In Kind of Extensively Deteriorated Portions of Historic Features

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If repair by stabilisation, consolidation, and conservation proves inadequate, the next level of intervention involves the limited replacement in kind of extensively deteriorated or missing parts of features when there are surviving prototypes.

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Step 6:

Energy Efficiency / Accessibility Considerations / Health and Safety Code Considerations

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Preservation guidance addresses the work done to meet accessibility requirements and health and safety code requirements; or limited retrofitting measures to improve energy efficiency

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Preservation as a Treatment

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When the property’s distinctive materials are essentially intact and convey the historic significance without extensive repair or replacement.

Preservation may be considered as a treatment.

Prior to undertaking work, a documentation plan for Preservation should be developed.