Rose of Jericho offer free and impartial technical advice on the correct specification and use of limes and traditional decorative finishes, along with all aspects of building and heritage conservation. Our team are available over the phone and specific advice can be found in individual product data sheets accompanying all products. Our Technical Advice and Technical Guidance notes are available on this page.
Since Rose of Jericho was established we have striven to produce the very best handmade products, using traditional materials and methods and we are always interested to hear from talented, enthusiastic individuals who share our ethos.
We offer work experience, work placement and apprenticeship opportunities to assist in the development of the next generation of conservation talent. Please do get in touch if you are interested in such a placement with Rose of Jericho.
Rose of Jericho offer CPD sessions to relevant professionals in the form of presentations and discussions relating to our products and services or conservation issues more generally. Our sessions are flexible in structure and can be designed around your specific interests and requirements and delivered at clients offices. Our lunch time CPD sessions for architects practices are always popular.
If you'd like to inquire about our bespoke CPD sessions, please complete the form below or give call us on 01935 83676.
Some recent topics for CPD sessions have included:
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The Ethos of Conservation |
Mortar Additives & Pozzolans |
Quicklime & Hot Mixing |
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Effectiveness of Sheltercoat & Limewash |
Traditional Paints and Coatings - ingredients, specification and use |
Non-Hydraulic Lime Putty or Natural Hydraulic Lime |
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Mortar/Materials Analysis - and scope to inform repair |
Roman Cements |
Use of Synthetic Fibres or Natural Fibre versus Animal Hair in Lime Plasters |
Below are the Technical Advice and Guidance notes to assist with successful use and application of our products.
The use of lime putty mortars externally during the winter months is not advocated, and certainly not when the temperature is below 5°C and falling. External work should be scheduled to avoid the period from October to March.
Animal hair has been added to strengthen and reduce shrinkage in lime plasters for centuries and is particularly important when applied to laths.
Lime plastering to solid masonry walls can be carried out in one, two or three coats. Three-coat work is normally necessary on uneven masonry. Two-coat work is often sufficient on flat surfaces such as brickwork. One-coat work is coarse textured finish plaster reserved for medieval and early buildings.
There is renewed interest in hot-mixed non-hydraulic lime mortars with many proponents being of the view that lime mortars prepared in this way have advantages over the normal practice of mixing lime putty and sand.
Traditional lime mortars carbonate ‘within’ as well as on the surface. Two groups of aggregate have a positive chemical effect on mortar performance, Calcareous or limestone aggregates and pozzolanic materials.
The Blending of Hydraulic and Non-Hydraulic Lime. The current situation is that it is agreed that a small proportion of non-hydraulic lime (either as hydrate or putty) can be added to hydraulic lime mortars to improve workability, but it must be understood that a reduction in strength of mortar will result.
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