There's a pretty simple rule for that. For conventional standard plasters, it should generally be the case that every one millimetre of plaster will take one day to cure. However, beware that individual plaster manufacturers always prescribe a recommended curing time in their technical data sheets, also depending on the type of plaster. The outside temperature is also very important - around 20 °C is ideal for even curing. But how many days a year do these conditions prevail? In any case, it is recommended to avoid the various extreme weather conditions. This applies not only to excessive humidity (rainy days), high temperatures (above 30 °C), but also to windy weather. Rapid drying out due to strong winds leads to over-drying of the plaster and thus to the risk of micro-cracks, as the chemical bonds have not had time to form. Similarly with temperature. The plaster should not be subjected to extreme thermal stresses so that undesirable stresses do not develop within the composition. Therefore, it is recommended to carry out the facade plastering early in the morning on warm days and, in addition, not to forget to cover the scaffolding with a net to prevent direct exposure to sunlight.

The builders try to minimize construction time and complete the buildings as quickly as possible. In the past, when speed was not as important, buildings were allowed to freeze over the winter to stabilize the structure. It was only in the spring that the finishing touches began to be applied. Today everything is different. Manufacturers usually specify a processing temperature limit of between 5 °C and 25 °C. The humidity should be up to 80 %. It is good to know that paste plasters are more sensitive to moisture than base plasters due to the higher proportion of chemical components. It can also be said that the better the quality of the plaster, the more resistant it is to any kind of stress. In these cases, the investment in quality is certainly worthwhile.