The Northwest Wall and Ceiling Bureau has been involved on several site inspections where architects and property owners are concerned about the veneer plaster systems they have specified.
Veneer plaster can be one- or two-coat systems. Two-coat systems use a veneer plaster basecoat that has some aggregate in the plaster. A one-coat system is the finish coat applied in two passes. In essence, both are a two-coat system. (The true two-coat system with an aggregate basecoat is more abuse resistant and allows the plaster crew some additional time to work the material.)