Category Archives: Event

Hot Mixed Lime Mortar – One Day Seminar & Workshop

Saturday 9 June 2018
Location: West Lexham, St Nicholas Church, Norfolk PE32 2QN

Hosted by: Nicholas Warns Architect Ltd in association with SPAB

The day will consist of a combination of talks and practical demonstrations. Suitable for those who have a keen interest in specifying and using the most appropriate building limes, for the repair of historic buildings.

Speakers include leading experts David Wiggins, Structural Engineer, Nigel Copsey, Conservator and Stonemason, and Nicholas Warns, Senior Conservation Architect and SPAB guardian.

Cost £85 per person. Group size 25 to 40 delegates. The cost includes light lunch and refreshments.

Space are limited so please book early to avoid disappointment.

Please send enquiries and bookings to Kate Walpole.
E: <>
T: 01603 622056



Sustainability of Traditional Buildings -STBA SPAB Conference

7 June 2018

The 2018 STBASPAB conference and exhibition which will again take place in June at Baxter’s Gallery in Clerkenwell, London from 9.30 to 17.00.

Keynote speakers from Ofgem, Each Home Counts and ICOMOS will provide an update on
policy and standards.
Delegates will hear about practical examples including the problems at the retrofit in Preston, what is happening in the Private Rented Sector, various projects in Scotland, and how a Whole House Approach is working out at scale in London.
During the day there will be a select group of exhibitors providing information on products and services in the traditional built environment.

Download the flyer

Book your place here>>

Understanding Building Conservation



With over 6 million traditional buildings and over 500,000 listed monuments in the UK, there is a considerable need for building professionals to understand the nature and practicalities of conservation.  For this reason, we have developed a course looking at conservation for both residential and commercial property as well as historic monuments.

In accordance with the ICOMOS (International Council On Monuments and Sites) Training and Education Guideline and the latest British Standard on conservation of historic buildings (BS 7913: 2013) the course will introduce the philosophy behind conservation before going into detail regarding the technical analysis of buildings, ensembles and sites, diagnosing issues, identifying the best building conservation solutions, working with the various  stakeholders, and ultimately providing advice regarding best practice.

At the end of the 2 days, you will be confident in your ability to apply practical skills towards building conservation, will feel much better informed in this field of practice, and will receive a certificate of attainment from the CIOB if you pass the end of course test. Moreover, those who pass the course will be eligible for further recognition under the new CIOB Building Conservation Certification Scheme.

For further details click here>>

Kellogg Urban Knowledge Exchange: Urban Heritage

25 April 2018

Kellogg Urban Knowledge Exchange: Urban Heritage

A multidisciplinary seminar, as part of the Kellogg Urban Knowledge Exchange series, will be held on Wednesday 25th April at 17:00-19:00 in the College Hub.

Five leading voices in the fields of architectural history, architecture, heritage research and urban conservation will pitch their views on how the urban landscape might be managed to celebrate and invigorate the built environment of the past in today’s era of smart cities, reconfigured time scales and new, emerging urban technologies. They will answer the question:

Cities change. How should urban heritage be managed?


Dr Geoffrey Tyack, Emeritus Fellow in Architectural History, Kellogg College

Professor Leidulf Mydland, Head of Community Department, Norwegian Directorate for Cultural Heritage

Debbie Dance, Director, Oxford Preservation Trust

Barbara Weiss, Skyline Campaign


Dr Oliver Cox, Heritage Engagement Fellow, University of Oxford

This is the latest in our series on key urban issues affecting society today. It will no doubt provoke some lively debate #urbankellogg

This event is free and open to all. Booking is required, please book via Eventbrite.

Refreshments will be served from 16:30, the seminar will begin at 17:00. You are welcome to stay for drinks after the event.

Further details here>>

Hot Mixed Lime Mortars Course

24 April & 18 May 2018
Venue: Charlestown Workshops, Fife

Another new course for our lovely building contractors… Have you been asked to make and use hot mixed lime mortars for conservation projects? Not yet? Well, you soon will be… there has been a growing interest in the truly traditional way of producing mortars – by mixing quicklime and sand together in one operation (and possibly with other materials and additions) and critically when it is appropriate to use them post production. Come and brush up your knowledge and skills and able to sell more services in the building conservation industry.

Calce Viva (Italian for ‘alive lime’ aka quicklime).

This one day workshop aims to provide an introductory guide to the preparation and use of’ hot mixed’ lime mortars, that is, mortars prepared by slaking quicklime, sand and natural hydraulic lime binders (and possibly other additives like tallow or pozzolans) to more closely mimic the appearance and technical performance of conservation mortars and in some cases offer advantages in use and technical performance over more conventional ‘cold mortars’. More and more clients and specifiers are asking building contractors to make and use ‘hot mixed’ mortars on their repair jobs, so get ahead of the game and brush up your knowledge and skills with us.
‘Hot mixed’ mortars have a long history of use in the UK, with evidence visible throughout the nation on traditional buildings and structures. Since the lime revival of the mid 1990s however, the preparation and use of conservation mortars has been largely dominated by lime putty bound mortars or ‘cold’ mortars based on natural hydraulic limes (NHLs). Whilst all these mortar types have their place, a renewed interest in the production of what are perceived to be more authentic mortar preparations using quicklime and sand has been growing and this workshop aims to take the building contractor through the process of making and using ‘hot mixed’ mortars safely, constituents to be used, preparation of mortars, correct mixing equipment and critically at which point these mortars should be used for particular applications.

By the end of the course, attendees will be able to recognise traditionally made ‘hot mixed’ mortars in historic structures and buildings and be able to develop the skills to produce and successfully cure ‘hot mixed’ mortars in relation to authenticity, performance, exposure, season, substrate and nature of the masonry repairs required.

Course suitability

This course is aimed at building contractors (including stonemasons, bricklayers, lime workers and labourers) involved in historic building repair, reconstruction and the consolidation of historic structures and give you the confidence to make and use ‘hot mixed’ mortars successfully.

Learning outcomes:

  • Ability to recognise traditionally made ‘hot mixed’ mortars in historic buildings and structures;
  • Ability to make and use ‘hot mixed’ mortars successfully;
  • Understand at which point, post production of ‘hot mixed’ mortars, these mortars should be used.

 Course programme through a blend of theory and practical sessions

  • Health and safety briefing;
  • Historic preparation and use of lime (and other) based mortars;
  • Understanding the range and production methods of lime binders available in the UK today;
  • Understanding other mortar constituents including sands and aggregates, pozzolans and other additives such as animal fats and milk products;
  • Why specify ‘hot mixed’ mortars? Including issues of authenticity, performance, workability and challenges thereof;
  • Causes of failure – including slow slaking, slow carbonation, wet and exposed locations, unpredictable materials and avoiding failures;
  • Making and using hot mixed lime mortars for repairs to traditional buildings– factors to consider, mix proportions, appropriate mixing equipment, when to use ‘hot mixed’ mortars post production and Building Standards;
  • Perceived barriers to specification – including Health and Safety for safe storage of materials, mixing regimes and safety in use.
  • Best practice for the production and use of ‘hot mixed’ mortars.

To book a place on any of this course, please click here, or call us on 01383 872722.