Objectives
Trainees are …
- able to organize building site, materials and tools for plaster/render
- aware of health and safety in relation to other workers, building site, machinery, equipment, PPE (personal protective equipment) and of issues specific to working with lime
- able to explain the structure of a lime plaster/render with its several layers
- able to apply the 1st base coat of a multilayer plaster/render
- able to apply the base “filling layers” to make the wall even
- able to apply a reinforcement mesh
Method:
- practical exercises at a workshop or building site together with rlevant theory
Theory:
- how and why to create a 1st layer to bond the plaster/render into the straw
- the structure and composition of lime multilayer plaster/render with their different thickness
- drying/carbonating timings of the different layers and tending (control of humidity, exposure, ventilation, etc.) procedures to ensure drying/carbonating
- connection between layers: remove sinter layer, texturize and wet the surface
- the protection of a drying render from weather conditions
- the need of having humidity on the wall during drying period
Practice/Task:
- Exercises:
- apply a lime slip by hand or using a mechanical spray
- apply base layers of lime with or without fibres to achieve an even wall
- reinforce by applying mesh
- check the thickness to guarantee bracing function as load bearing material
- check good execution to guarantee a minimum thickness for fire protection, air tightness, water proof, acoustic performance and rodent and insect protection
Materials/Documents: U5 S7 – Session Plan
Training Time: 1 day
