Maximum thickness and processing conditions for ceiling plaster

Materials for plastering ceilings or walls indoors are needed to produce even and smooth surfaces. Depending on the substrate, different requirements are placed on the materials for plastering. Single-layer processing is often desirable, but only possible if plastering materials such as gypsum plaster or other ceiling plasters are processed in one layer only with the maximum permissible layer thicknesses.

The single-layer processing of ceiling plaster

If you only want to apply ceiling plaster in one single layer, you probably have the much less time and material required for processing. In fact, it is a very economical way of processing with high functionality, which however can not be applied in all cases. An important point is the maximum thickness or thickness, which depends on different conditions. Always use the manufacturer's instructions when processing the material. In addition, you should make sure that the substrate is also suitable for receiving the material. In particular, the following properties are important:

  • The substrate must be stable, dry and dust-free.
  • In addition, it is important that it is an absorbent substrate such as masonry, lime or cement.
  • Loose parts, already mellow plaster as well as poorly adhering coatings must be removed.
  • Depending on the plaster, the substrate may need to be pre-wetted.

To the maximum layer thickness of ceiling plaster

The maximum layer thickness depends on different circumstances. Commercially available plastering materials for application to the ceiling underside allow layer thicknesses of up to about ten to twelve millimeters for single-layer processing. When it comes to so-called thin-layer plaster, for example plaster, it is usually applied in thicknesses of between about three and six millimeters. The so-called gypsum flat spatula is used to produce particularly high-quality and smooth surfaces. Here, layer thicknesses of up to about three millimeters are possible, in individual cases and depending on the manufacturer also layer thicknesses of up to five millimeters.

Only apply ceiling plaster as thinly as possible

In general, the materials should only be applied as thin as possible. After all, they only serve to maintain a surface that is as level as possible and to compensate for unevenness in the substrate. This can already be possible with very small layer thicknesses.

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