Introduction to working with lime in buildings

Tywi Centre



Lime is the binder in almost all traditional mortars, plasters and renders. It is also increasingly popular as a material for new building projects. The wide range of lime products available on the market present us with a pallet of possibilities. This training module is intended to introduce the different types of lime, the choice of aggregates and additives and the selection of the appropriate combination to suit the task. The training will include practical elements such as mixing, application and aftercare. This course can be delivered at the Tywi Centre or at a site that is relevant to the candidates.

Summary of content

  • Working on conservation and historic repair projects
  • Discovering the mechanics of old buildings
  • Understanding lime – Lime science and the lime cycle
  • Types of lime including putty, natural hydraulic lime, cork and hemp lime and hot mixed lime
  • Health and safety specific to lime
  • Additives – hair, pozzolans, mesh/ scrim
  • Aggregates
  • Analysis of mortars
  • Mixing methods
  • Application to different backgrounds
  • Practical sessions



Who should attend?

This course is suitable for anyone who has experience of working in construction- either heritage or modern. Site managers, plasterers and masons who are working on historic buildings would find this of real value.

CITB Training standards and grants

This course is a CITB training standard. CITB registered companies may be eligible to apply for funding from CITB to cover the cost of this course and to receive a short course grant. For full details of available grants and funding please visit or speak with your CITB local adviser.

CITB GET code and grant tier

GET2226 - grant tier 2


Introduction to working with lime in buildings

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