If you want the plaster to lay down well, does not crumble and not crack, it is very important to properly prepare the surface. Remove dirt and dust from the surface. Typically, grinding products are used for this (sandblast, abrasive paper). Remove the old paint or wallpaper with a spatula. If the surface is strongly contaminated, it is necessary to use a detergent on an alkaline basis. Be sure to rinse the product from the surface with cold water.
The final step will be cleaning the wall with sandpaper. After grinding, wipe the wall with a rag. Make sure the wall strength, t. To. Staggering elements can provoke cracks on the plastered surface. Check the wall, scraping the surface with a sharp object. If the material is crumbling, then the plaster cannot be applied.
When the surface has potholes or other irregularities, you must first primed it with a good primer and a layer of finish putty. It is important to freely close the seams of the surface, so that the finished coating subsequently has a beautiful view. In the room where plastering is carried out (and 3 days after the completion of the work), a temperature of at least +5 degrees should remain, and humidity not exceeding 80%. In each case, these rules are supplemented by others based on the surface of the surface.