This code provides comprehensive guidelines for applying cement and cement-lime plaster finishes to walls and ceilings. It details background preparation, mix proportioning, application techniques, and curing to ensure durable, well-bonded, and defect-free finishes.
Code of practice for the application of cement and cement-lime plaster finishes
Quick Reference Values
single coat plaster thickness12 mm
under coat thickness two coat work10 to 12 mm
finishing coat thickness two coat work3 to 8 mm
minimum curing period7 days
wait time between coatsat least 2 days
Practical Notes
Ensure masonry joints are raked to a depth of 10 mm while the mortar is still green to provide adequate mechanical keying for the plaster.
Avoid over-troweling the plaster surface with a steel float, as it brings laitance to the surface and causes crazing and shrinkage cracks.
The background masonry surface must be properly wetted (but not dripping wet) before plastering to prevent it from absorbing water from the plaster mix.