Normal plaster, abbreviation according to DIN EN 998-1: "GP". Plaster mortar without special properties, dry bulk density > 1,300 kg/m³.
In the case of an exterior plaster made of normal plaster, the average plaster thickness of the system of underplaster and top plaster is a total of 20 mm, which may be undercut by up to 5 mm in individual places.
Source: bauwion