Walls and ceilings must be smooth, clean, dry, and free of grease and dust before wallpapering.
Remnants of old wallpaper should be removed without leaving any residue. In order to ensure equalization of absorbency, i.e. to ensure uniform absorbency and, if necessary, to solidify sanding plaster substrates, we recommend priming the surfaces in advance with a water-based deep primer.
To prevent color irregularities in the substrate from showing through the wallpaper, a wallpaper primer can be applied before application. Alternatively, a smooth base wallpaper, or so-called lining paper or maculature wallpaper can be applied.
Wallpaper primer is generally white. We recommend tinting the wallpaper base in advance with special tinting paints for wallpapers in strong colours. If a slightly open seam is created later during wallpapering, the substrate will be barely perceptible.
Instead of pre-treatment with a wallpaper primer, a smooth base wallpaper or a wallpaper with a wastepaper finish can also be applied.
In the case of very uneven walls or difficult surfaces such as unplastered masonry, rough plaster or wood, the entire surface should first be filled and leveled. In the case of holes, rough surfaces as well as unevenness, we recommend smoothing and leveling them with gypsum-based filler.