Page 159 - The Building Conservation Directory 2013
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t w e n t i e t h a n n i v e r s a r y e d i t i o n
t h e b u i l d i n g c o n s e r vat i o n d i r e c t o r y 2 0 1 3
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4.1
Services & Treatment : Protection & Remedial Treatment
commonplace. There are advantages of spray application in that a
lower water content is required for application, minimising the risk
of drying shrinkage and creating a more compacted mortar finish.
The action of spraying under pressure also helps to ensure a good
contact between the substrate and the lime coating. However, if
re-instating a harl finish to a traditional or historic property, it can
be difficult, if not impossible, for a sprayed-on coating to match the
texture and appearance of a traditional hand-cast finish. In such
circumstances, a hand-cast finish should be specified for the finish
coat, even if the underlying coats are to be mechanically sprayed.
Many of the materials and methods used for lime harling over
the past two decades bear little resemblance to traditional lime harl
coatings. We still have much to re-learn from traditional practice.
Harling which has survived for over a century on many of our
traditional and historic buildings can tell us much about what we
should be doing today, and it is through organisations such as the
Building Limes Forum that we can share experience and understanding
of traditional building limes.
Further Information
Building Limes Forum
The BLF exists to encourage
expertise and understanding in the appropriate use of building
limes and education in the standards of production, preparation,
application and after-care. It is a charitable organisation with
no commercial ties, and has about 350 members in the UK and
overseas, the majority being actively concerned with either the
repair of historic buildings or the use of lime in new build.
Courses
Several organisations provide short practical courses in the use of
lime, including the Scottish Lime Centre Trust. See page 195 for
details.
Recommended Reading
Technical Advice Note 15: External Lime Coatings in Scotland, Historic
Scotland (available free to view at
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scotland.gov.uk/publication-detail.htm?pubid=8544)
English Heritage, Practical Building Conservation: Mortars, Plasters
and Renders, Ashgate, Farnham, 2011
Craig Frew
MSc IHBC is sole principal at Craig Frew Building
Conservation Ltd. He has 12 years building conservation experience
with a focus on traditional masonry and lime mortars, having
previously worked with the Scottish Lime Centre Trust and Laing
Traditional Masonry Group. Email:
Wardlaw Mausoleum, Kirkhill: typical surface weathering of ten-year-old lime
harling and limewash
MORTARS & RENDERS
Bleaklow Industries Ltd, Hassop Avenue, Hassop,
Bakewell, Derbyshire DE45 1NS
Tel: 01246 582284 Fax: 01246 583192
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ANGLIA LIME COMPANY
Fishers Farm, Belchamp Walter, Sudbury,
Suffolk CO10 7AP
Tel 01787 313974 Fax 01787 313944
Email
LIME PRODUCTS
: The last 25 years have seen the use of building
limes develop from what was regarded as a quaint eccentricity
to an understanding that they are a central element of building
conservation. Anglia Lime Company supplies best quality
lime products, including bespoke ready-mixed mortars,
alongside technical advice on all aspects of the use of lime.
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AURA CONSERVATION
Dunham House, 181 Wellington Road North,
Stockport, Cheshire SK4 2PB
Tel 0161 442 9850
Email
RESTORATION OF LISTED/HISTORIC BUILDINGS AND CHURCHES
:
See also: display entry in Stone, page 98.
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CARREK LIMITED
1 St Andrew Street, Wells Cathedral, Wells,
Somerset BA5 2UN
Tel 01749 689000 Fax 01749 689089
Email
HISTORIC BUILDING REPAIRS
: See also: profile entry in Building
Contractors, page 65.
