Basically, both indoors and outdoors, there is the option of providing walls with an attractive and functional layer of scratch plaster. The scratch plaster, which has been tried and tested for centuries, can show its particular strengths especially on the outside of the house wall. To do this, however, it must be processed correctly and applied correctly.
What are the special advantages of the scratch plaster on an outside wall??
First of all, of course, you should make sure you choose the right material for your planned project. Many of the ready-mixed products with the designation "scratch plaster" are not the scratch plaster with dispersion-open surface that has actually been tried and tested for centuries. It can therefore be worthwhile to actually mix the scratch plaster with water on site and to tint it yourself with suitable coloring agents. Finally, painting the scratch plaster surface with facade paint should be avoided as much as possible in order to benefit from the special advantages of this special form of facade design. It is as follows:
- real scratch plaster is largely "self-cleaning" due to the "sanding "
- Scratch plaster is insensitive to water and open to dispersion
- this plaster can store heat well
- if it is dirty, scratch plaster can be "rubbed clean" relatively easily
How is scratch plaster attached to an outside wall??
In order for this type of plaster to hold well, the material underneath should initially be slightly damp and then dry as evenly as possible when the plaster material solidifies. However, this is not always the case with the difference between masonry and mortar (7.79 € on Amazon *). Therefore, in many cases, the scratch plaster is applied in two layers. The first layer then also serves to compensate for structural differences in the wall and thus create a really flat surface. Only when this layer has dried sufficiently can the later actually visible layer of scratch plaster be applied. This layer should be about 10 to 15 mm thick before "rubbing off". So there is enough material available to finally produce the desired thickness of 8 to 12 mm by rubbing it in a circle with a nail board.
How is scratch plaster cared for outdoors??
If a facade wall coated with scratch plaster is occasionally hit by rain, light sanding automatically leads to a certain self-cleaning of the facade. However, it can of course be the case that some areas directly under the eaves are barely or not at all affected by rain. You can wash these areas with a hose every one to two years. If the wall becomes dirty over the years, you do not need to paint the wall. It is sufficient to simply rub the affected areas carefully in a circle with a fine plaster scraper or nail board.