Gypsum plaster dry

Freshly plastered plaster and other interior plasters require sufficient time to dry. With simple means, the drying process can be supported. Patience is in demand, because too rapid drying damages the plaster. Cracks are the visible consequences.

Observe the service life for gypsum plaster

Each interior plaster requires a certain time to dry before, before it may be processed. This so-called service life must be adhered to, whether tiles, wall paint or wallpaper should be applied to the plaster. On the packaging of the plaster are the service life. You can vary depending on the variety and manufacturer. If the climatic conditions are cool and humid, the service life will be longer. The minimum downtime must not be exceeded. If the plaster is subjected to subsequent work too early, cracks and other damage will form. In the worst case, the unsuccessful plaster has to be removed and reapplied.

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Promote drying through ventilation

The damp gypsum plaster ensures a high level of humidity in its environment. If the room climate is humid for several days, a calcite skin can form on the plaster. This skin prevents the plaster from drying. In order to avoid the harmful high humidity, the drying process must be regularly ventilated briefly and vigorously.
Tips for proper ventilation:

  • Do not expose the plaster to drafts for the first 24 hours.
  • Regularly and several times a day briefly intermittent ventilation and cross ventilation so that moist air can escape.
  • At low temperatures, heat the room slightly and avoid direct heat radiation from the plaster.
  • As a result of the heating, the warmed-up air also absorbs moisture, which must also be removed by vigorous ventilation.

Plastering and drying in winter

In the winter months, plastering work can only be carried out at temperatures above five degrees. The mixed water with which the dry mortar is mixed must also be at least five degrees. Even during the entire drying time of the plaster, it must not be colder than five degrees. Frost damage to the fresh plaster leads to flaking and cracks.

Tips & Tricks Do not blast the gypsum plaster directly with a heater in order to accelerate the drying process. Gas heaters with an open flame generate moisture by themselves. Burning one kilogram of propane produces more than one and a half kilograms of water.