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is applied to the bare stone. While this render is still wet a specially shaped trowel is used to throw the pebbles onto the lime surface, which are then lightly pressed into it. Harl, being mostly lime render, cures chemically rather than simply drying. After this setting process, the harl is
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Meek, T, (2020) The
Practical and Cultural Implications of a Bare Stone Paradigm in Heritage Conservation. The Construction Historian
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process involving a slurry of small pebbles or fine chips of stone. After a wall is complete and has been pointed and allowed to
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Addyman, T., Meek, T. (2019) Historic
External Lime Finishes in Scotland. Technical Paper 31, Historic Environment Scotland
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harling. Over the years water had penetrated the harling and threatened the overall integrity of the building. The
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Adderley, P., Meek, T. (2019) Harl-as-you-Go! Implications for robustness. Journal of the
Building Limes Forum.
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have walls finished with harling. It is also used on contemporary buildings, where it protects against the wet
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wall finish consisting of lime and aggregate, known for its rough texture. Many castles and other buildings in
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Meek, T. (2022) Pointing and Joint
Finishing in Scotland. Technical Paper 33. Historic Environment Scotland
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The technique of harling features in a large number of famous
Scottish buildings including:
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It is not recommendable to replace more than around 20% of the lime content with
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An example of the inadequate protection afforded by high cement harling is the
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Meek, T., (1996) Case
Studies of Traditional Lime Harling. Historic Scotland
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completed in 1904 using the newly available but poorly understood
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403:"Mackintosh's Hill House reopens inside a box - BBC News"
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Inspections and
Reports on Dwellings: Assessing Age
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184:Harling as a process covers stonework using a
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476:Building materials
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52:Please help
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353:18 February
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471:Plastering
455:Categories
329:References
323:Pargetting
217:Hill House
197:sometimes
186:plastering
158:rough-cast
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318:Roughcast
215:designed
180:Technique
461:Building
407:BBC News
307:See also
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231:Examples
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