What is the scratch?

Scratches are the bottom layer or plaster coating that is applied to the wall. While it is still wet, this coat is scratched using a spatula or some type of serrated blade. Creating a network of surface scratches helps the other layer of plaster properly glued to scratches by allowing the coat of gypsum to enter the scratches and create a link between the two layers.

Scratches can be used with almost any type of wall, including a new design. The scratch can be applied to such diverse wall surfaces as stone, sheetrock and even bricks. Once this basic coat is applied to the wall, it is allowed to dry slightly. However, the scratches are created before the first layer of plaster. This leaves a rough surface with small slings that can be filled when the second layer of plaster is served.

While there are ridge tools that can be used to prepare scratches in the background coat, it is more common to use trowel or even a serrated knife to create rowsy scratches. The real task of scratching in plastering is not difficult at all. Because the scratch is the first layer of plaster on the wall, there is no need to spend a lot of time smoothing the surface before starting the process of scratching. Basically, the scratch must simply be relatively smooth, but with small scratches spread over the entire surface of the wall.

Once the scratched coat is enabled, the target coat can be applied. While the plastering of this upper coating, the second layer of gypsum fills the scratches on the base coat. This action basically creates points across the surface of the wall, where two layers are connected and can create a bond that provides higher stability of the completed manner.

Although it is possible to use this combination of scratches and finishing coat to plaster any type of wall, many professionals tend to discourage this approach to the brick walls. The reason is that a small amount of salt can be collected over time in small niches on a brick surface or even leeches to CIhlly from the ground or on the roof along the top of the wall. Salt significantly delays the process of drying the plaster.