Fill inside plaster - the fine sanding for the wall

If formerly bare walls are to become comfortable and appealing surfaces, the final finish should receive the utmost attention. This is only possible with the right filling. With the right tools and instructions, it's all possible.

What does filling mean?

The equalization of holes, joints and bumps as well as bumps after the interior plaster renovation belongs to the field of putty work. To further process the subsequent wall, the quality of the filling is crucial, which is divided into four quality levels.

quality standardsdefinitionopticssuitable for:
Q1Holes, joints closedEdges, grooves, degrees are allowedUpper plasters, tiles
Q2smoothed and just without groovessmall pores and trowels allowedStandard quality for wallpapering
Q3Q2 plus freedom from pores and surface smoothingwide applied fillWall paints or glazes
Q4Q3 plus full-surface filling1ahigh quality wallpaper, high gloss paintings

What preparations are necessary?

Before you start filling, the wall must be clean and dust-free. A sticky or deep base ensures good adhesion to the substrate. Which putty you use depends on the thickness of the job you need. Some fillers are also refined with glass fiber, which makes them particularly stable but also expensive.
Mix the filler in a mixing bucket, bucket or plaster cup. Only stir as much putty as you can process in 30 minutes. Larger quantities bind and become unusable.

Which fillers are used?

  • Painter spatula with trapezoidal leaf
  • Japan spatula, rectangular with flexible leaf
  • Surface spatula with scraper blade
  • rubber spatula

How is filling?

The mixed putty is coarsely applied with a surface spatula and pressed into the cavities. Now pull the wall surface evenly from bottom to top. Repeat the process until a uniformly smooth wall surface is created. Do not apply too much pressure when pulling off, so that no further depressions are created. Depending on the desired quality level, the surface can be sanded after drying.


Tips & Tricks

Always make sure that you are working at eye level. This means that you always have the area in direct view. A stepladder performs well.

Product Image: Iakov Filimonov / Shutterstock

Video Board: How To: Fill & Sand a Wall