Coatings and Consolidants for Masonry with David Odgers

Building conservation masterclass

Ref: B2D11563

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About this course

Understand the historic importance and current application of coatings and consolidants to masonry and plaster. Through demonstration, lectures and practical exercises you will learn about the materials that have been and are used, how to select and apply them and also their potential advantages and drawbacks.

Course Description

There is a long heritage to both the painting of masonry and to the application of materials to attempt to consolidate decayed stone surfaces. You will start by learning about the nature and historic use of these materials and how they have affected the stone and its subsequent treatment. Through demonstration and practical exercises, you will be introduced to lime-based coatings and consolidants and then the nature and application of chemical consolidants. After learning about the theory of surface coatings such as paints and hydrophobic coatings, you will have an opportunity to see them being used and understand their different characteristics.

By the end of the course you will have learned:
• the important distinction between surface coatings such as paints, limewash and sealants
• how consolidants such as nanolime and silanes work
• how, why and when the use of consolidants might be appropriate
• which materials are currently available and the likely effect of their use
• to identify the benefits and drawbacks for each

Day 1
16.00- 18.00- Register
18.45- Welcome talk
19.00- Dinner
20.00- Introductions and short presentation to place the course in context of wider conservation principles

Day 2
09.00- Lecture:  Historical use of and general purpose of coatings and consolidants
11.00- Demo/lecture:  Lime-based materials for consolidation and coatings. Practice and theory combined in explanation and demonstration of coatings and consolidants based on lime – limewater, limewash, nanolime
13.00- 13.45- Lunch
14.00- Demo/lecture:  Consolidants - how they work in theory and practice
16.30- 18.00- Demo/lecture:  Consolidants:  Practical session showing how consolidants are prepared and applied.
19.00- Dinner

Day 3
09.00- Lecture:  Types, properties and characteristics of surface coatings (including hydrophpobic treatments), paints and anti-graffiti coatings
11.00- Demo/practical: application of paints and surface coatings
13.00- 13.45- Lunch
14.00- Lecture:  Summarising when coatings and consolidants are appropriate
16.00- Issue of certificates and depart


Arrival Day - this is the first date listed above

Courses start early evening. Residential students to arrive from 4pm, non-residential students to arrive by 6.45pm.

6.45pm: Welcome, followed by dinner (included).

8 - 9pm: First teaching session, attendance is essential.

Daily timetable

Classes 9.15 - 5pm, lunch is included.

From 6.30pm: Dinner (included for residential students).

Evening working - students may have access to workshops, but only with their tutor's permission and provided any health and safety guidelines are observed.

Last day

Classes 9.15am - 3pm, lunch is included.

Residential students are to vacate their rooms by 10am please.

(This timetable is for courses of more than one day in length. The tutor may make slight variations)

Course Materials

What students need to bring

Please remember to bring work clothes/overalls and shoes/boots for practical sessions.  A torch and umbrella may be useful on the short walk to the Auditorium and Ruinette.


David Odgers

BCM Course Leader

David is Director of Odgers Conservation Consultants who provide support, advice and training for clients, architects, surveyors, local authorities and others involved in the conservation of historic structures.


Residential option available. Find out accommodation costs and how to book here.

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