Ashlar cutting is a method of creating features in the external render, where grooves are cut directly into the “green” render surface (usually directly after scraping). Various shaped cutting tools can be used to create different profiles and the cuts are usually set out uniformly. This method can be used to help simulate stonework.
Quoins are a particular type of raised band where the render is cut to simulate quoin stones at the corners of the building creating an impression of permanence and strength.
When rendering a house, bands form a striking visual feature. Bands are raised areas of render used to provide a feature, usually around windows and doors. The render is applied at a greater thickness than normal, it is finished to create the feature and then allowed to harden before the main elevation is rendered.