Lime plaster can be made by yourself

At first glance, mixing lime plaster is a simple task. But beyond the basic mixing ratio, the different types of lime and their composition should be taken into account. The best known representatives are quicklime, lime, hydrated lime, quick lime, limestone, water lime and hydraulic limestone.

Basic mix ratio as a basis

In general, every lime plaster can be completely self-made by itself during plastering work. The mixing ratio consists essentially of the two ingredients lime and quartz sand. The basic rule of thumb is:

On one part of lime, two to five parts of sand are added. The dry mixture is mixed with water. The proportion of water and any subsequent subsequent moistening have a decisive influence on the maintenance of the plaster. The moisture requirement and degree depends on the external conditions and the type of lime.

Plaster types and alternatives

It is possible to mix with lime different lime plasters, which are adapted to the type of processing and the nature. The following plasters can be mixed from lime:

  • spray plaster
  • decorative plaster
  • Fine plaster according to sand grain
  • Rubbing plaster with structure

In the interior, almost all lime plaster can be used. Outside, a lime plaster or a lime cement plaster may be the better choice to better withstand the weather.

The following lime plaster types are used for facades:

  • Burnt fine and lump lime
  • hydraulic lime
  • natural hydraulic lime
  • Lime mixed with pozzolan or cement

Inside, the following limestones can also be used:

  • hydrated lime
  • lime putty

The setting of the lime arises from a chemical reaction, the carbonization. Depending on the type of lime, the lime loses too quickly the water stored in it or is too wet. Too fast drying leads to the so-called "burning", too wet plaster does not harden.

When making your own lime plaster, you should always make exact inquiries as to which "stiffening time" the chosen type and mixture needs. It is between ten minutes and one hour. Depending on the behavior, a permanent moistening is required when the plaster begins to "burn". With the hydraulic quality, the sensitivity of the lime plaster increases.

Tips & Tricks

If you work with slaked lime, you have a highly alkaline material in front of you. Be sure to protect your skin and eyes from contact. In addition to long-sleeved protective clothing, the high-fat creaming of the hands and arms helps.

Artikelbild: The Five Aggregates / Shutterstock

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