Plaster Types and Mix Ratios
- Gypsum Plaster: Pre-mixed, 1 part gypsum to 0.5 parts perlite. Interior only.
- Lime Plaster: 1 part lime putty : 3 parts sand. Breathable, flexible.
- Cement Plaster: 1 part cement : 4-6 parts sand. Durable, waterproof.
- Venetian Plaster: Lime putty based, applied in thin burnished coats.