Plaster is the surface that most rewards a good hand and most punishes a careless one. Venetian plaster, tadelakt and limewash all read as warm, hand-made walls, but they behave differently in application, in wear, and in how they meet water; and each asks for a different craftsman. After a year working with three plasterers across two countries, the lesson is simple. The material is only as good as the person applying it.
Three plasters, three hands
Venetian plaster builds depth through thin, burnished layers; done well it has a movement and a soft sheen that paint cannot approach, and done quickly it looks like exactly what it is, a rushed effect. Tadelakt is a different animal, a lime plaster polished and sealed with soap until it turns water-resistant; it belongs in a bathroom or around a bath, and it lives or dies on the patience of the polishing. Limewash is the quietest of the three, a thin mineral wash that settles into a chalky, breathing matte and ages by softening.
What they share is intolerance of shortcuts. The drying has to be respected, the layers cannot be hurried, and the final pass is where the whole wall is won or lost. We have learned to specify the plasterer as carefully as the plaster, and to build the programme around their time rather than against it.
The payoff is a wall with depth and a long life. A properly applied lime or Venetian surface holds shadow, shifts through the day, and takes on age in the right direction. It is more expensive than paint and slower than paint, and in the rooms that matter it is worth both. We would rather spend on the wall itself than on what we hang against it.