In many cases, old roll-on plaster should also be removed during renovation because it has become crumbly or no longer holds up well. Another reason may be that you no longer like the structure. Scraping is by and large a very tedious and time-consuming job - but there are alternatives.
Remove roller plaster electrically
To remove the roll-up plaster alone (€ 49.99 at Amazon *), you can generally remove it with a scraper like wallpaper, especially if it has already become crumbly. This type of removal is very laborious and time consuming. You can make it easier for yourself by wetting the wall on the one hand (as with wallpaper) and on the other hand using an electric scraper. When scraping off the old roll-up plaster, however, you have to be particularly careful not to damage the plaster underneath too badly - otherwise repairing this plaster layer is particularly time-consuming and difficult. After scraping off the roll-up plaster, the wall must dry out as much as possible and then be filled. In many cases, however, the damage by removing are so numerous that you are best gripping to a surface spatula. As a rule, the higher the synthetic resin content in roll plaster, the more difficult and time consuming the removal and the higher the damage of the substrate.
Rollpututz instead of removing the removal
The step of scraping can be spared in many cases when the old rolling plaster is spread right away. Since after scratching in virtually all cases a surplus has become necessary anyway, a very time-consuming step is saved here. Although thereby increases the layer thickness of the plaster applied to the wall, as a rule, this is far from most cases not problematic. The durability of the newly applied plaster is thus ensured. Incidentally, it is best to use Rotband for filling over.
In the case of very pronounced structures: possibly grind first
In the case of very pronounced structures, e.g. due to large grain sizes, it can be useful to roughly sand the wall first, and only then fill in the remainder of the wall. With pronounced structures, additional plaster heights of 5 millimeters and more may otherwise arise, which can certainly cause problems in individual cases. How best to actually proceed, however, is always decided in the end by the local conditions.