Traditional ‘Hot Mixed’ Mortars – A Practical Hands-On Training Event – March 2023 – €300

Course Overview:

This two-day workshop aims to provide specifiers, trades and craft workers an introductory to the basic Conservation Principle of ‘like for like’ materials with the preparation, and use of hot mixed lime mortars. The Health and Safety of using and storing Quicklime will be highlighted.  The role of sand aggregates, lime binders namely Quicklime and pozzolans will be discussed.  The attendees will compare and experience freshly mixed bedding, pointing and plastering mortars.  On completion the participants will be able to recognise traditionally made ‘hot mixed’ mortars in a traditionally built structure and will confidently generate and or specify a ‘hot mix’ of their own creation.


Who the course is for:

  • Building contractors: stonemasons, brick layers/masons, plasters, labourers, carpenter joiners.
  • Specifiers / Professional:  architects, engineers, surveyors, built heritage / conservation specialists / consultants / heritage specialists / conservation and or heritage officers



  • Caroline Gethings – Anú Heritage Conservation Consultant
  • Patrick Hickey – Historic Mortar Specialist / Traditional Stone Mason Patrick Hickey
  • Billy Bates – Inish Pebble Director / Sand Specialist


Venue:  Inish Pebble Company, Newtown, Kilmore Quay, Co. Wexford Y35XF58


Duration: 2 Days Start Time: 9.30am End Time: 4.00-4:30pm


Date: March dates – exact days to be confirmed


Course Programme

Day 1:

9:30 am Health and Safety – storage of material, safety in use

10:00am Quicklime – the binder historically and availability in Ireland

10:30am The difference between ‘Hot Mixed’ and ‘Cold Mixed’ binders

11:00am Tea Break

11:30am Sands, aggregates, pozzolans and other additives.

12:00am Visual assessment and identification of historic ‘Hot Mixed’ bedding mortars and plasters.  How to determine Quicklime ratio and aggregate size for repair work.

13:00pm Lunch

14:00pm How to determine the need for a Pozzolan additive (Hybrid/Gauged Mortar) and where and when they should be applied if needed.

14:30pm Why ‘hot-mixed’ mortars?  Insight into performance, workability and challenges through mixing

15:30pm Preparation of built fabric to accommodate traditional mixes

16:00pm Application of ‘Hot Mixed’, and ‘Cold Mixed Mortars

16:30pm END


 Day 2:

9:30am Assessment of Day 1 traditional ‘Hot Mixes’ and ‘Cold Mixes’

10:30am How to prepare and tools required for your application area

11:30am Tea Break

12:00pm Application of bedding / pointing mortars and plasters / renders in action

13:00pm Lunch

14:00pm Assess applications, develop new mixes and apply

15:30pm After Care of applications

16:00pm Questions and Answers


What are the perceived barriers to specifying and using ‘Hot Mixed’ Mortars and Plasters?

How to develop a specification – what factors to consider – ratio’s

16:30pm END