Gypsum plaster is an inseparable element of interior finishing. Their properties allow you to obtain smooth surfaces that are an excellent base for wallpapers and paint coatings. Gypsum plasters are used in residential, office and public spaces. Recently, due to the growing popularity of the eco trend, gypsum plasters are gaining in importance due to their ecological and health properties.
There are various types of gypsum plasters available, which differ in their intended use, method of application, smoothness of the surface and resistance to damage. Therefore, before choosing a plaster, it is worth consulting a specialist who will help you choose the right product for your individual needs.
Characteristics of gypsum plaster
The main components of gypsum plasters are gypsum, calibrated aggregate and enriching additives, such as lime and plasticizers. Depending on the purpose, there are several varieties of products that differ in application technology, resistance to damage and surface smoothness. Gypsum plasters can be applied on substrates whose humidity does not exceed 3% and the temperature in the rooms is not lower than 5°C. They are not intended for use in rooms with high humidity, such as kitchens or bathrooms.
In the case of large surfaces, machine plasters are used, applied with a plaster aggregate. With a smaller scope of works or renovations, plasters for manual application are used. In places exposed to mechanical damage, it is worth applying plaster with increased hardness, while varieties containing lightweight aggregate have higher efficiency and better heat absorption.
Plastering – rules and tips
When applying gypsum plaster, pay attention to its thickness. The minimum acceptable thickness of machine plaster is 8 mm, and 5 mm applied by hand. However, the maximum plaster thickness on walls cannot exceed 25 mm, and on ceilings – 15 mm. Thin-layer plasters (from 3 mm thick) can be applied on carefully laid, smooth and even substrates. However, in practice, their use is limited to surfaces where no electrical installation is carried out.
After applying the gypsum plaster, free air circulation in the interiors and air temperature above 5°C should be ensured. After the plaster dries, at the earliest after 14 days (depending on weather conditions) and proper priming, continue with the planned works.
Gypsum plasters are an excellent choice for interior finishing, because they allow you to obtain aesthetic and durable surfaces. However, their correct application and care require some knowledge and experience, so it is worth consulting a specialist before starting finishing work.