Lime Plastering: Part 1 — Rosie and the Farm

Lime plaster and gypsum plaster differ not just in appearance, but in how they behave within a building system. Lime plaster cures slowly through carbonation, remaining breathable, which allows it to accommodate subtle building movement and manage moisture over time. This makes it particularly well suited for historic masonry walls and assemblies that rely on vapor permeability rather than impermeable barriers. Gypsum plaster, by contrast, sets rapidly through a chemical reaction, producing a de