re pointing mortar joints in historic masonry buildings
TRANSCRIPT
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Repointing Mortar Joints in Historic Masonry Buildings
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Famous Masonry Buildings
The Roman Colloseum Philadelphia City Hall
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Identifying the Problem before Repointing
Ageing of the material, water infiltration, molding, aggressive environment
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Examination of deterioration degree
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Tracking markings for evolution in time of discontinuities
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Tests for finding the proper mortar
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Finding an Appropriate Mortar Match
The preparation of the probationary mortarsThe preparation of the probationary mortars
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Preparation of joints for repointing using a hammer and a chisel
Preparations
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Preparations
Cleaning of the joints with compressed air
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Execution of work
This mortar has the proper consistency for repointing historic brick.
This early 19th century building is being repointed with lime mortar.
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Execution of work
Masons practice using lime putty mortar to repair historic marble.
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Repointing of mortar
Adequate Inadequate
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Selected Reading
Ashurst, John & Nicola. Practical Building Conservation. Vol. 3: Mortars, Plasters and Renders. New York: Halsted Press, a Division of John Wiley & Sons, Inc., 1988.
Cliver, E. Blaine. "Tests for the Analysis of Mortar Samples." Bulletin of the Association for Preservation Technology. Vol. 6, No. 1 (1974), pp. 68-73.
Coney, William B., AIA. Masonry Repointing of Twentieth-Century Buildings. Illinois Preservation Series. Number 10. Springfield, IL: Division of Preservation Services, Illinois Historic Preservation Agency, 1989.