Types of finishing coat and its application: One of the necessary building materials for renovation and finishing works is finishing coat . Thanks to its use, we can enjoy a perfectly smooth surface of the walls. There are many types of plaster on the market, so it can be easily adapted to specific conditions. You can choose both those that will work well for smoothing internal and external walls. What are the types of plaster and what is their use and how to apply the plaster yourself?
Putty plaster in finishing works
This type of material has successfully replaced the once used cement-lime plaster, which can be found in old buildings. A characteristic feature of the plaster is the rough surface texture and cracks that occur over time. It is different in the case of finishing coat. Thanks to the use of this modern finishing material, it is possible to obtain a perfectly smooth surface. As a result, the walls are easier to maintain as dust does not collect on the smooth surface. This solution is characterized by high aesthetics and high resistance to mechanical damage. Finishing coatit usually consists of a gypsum base, which is a filling and binding element, and admixtures of other minerals. In addition, the composition of the finish coat includes ingredients designed to plasticize it and delay the setting of the plaster. Thanks to this, we gain a material that is easy to apply and does not dry out too quickly. We can get the putty both in the form of a dry mix and a plastic mass that is immediately ready for application.
Types of putty
There are several types of plaster of paris available on the market, which have different properties. Hence, they are designed for a variety of uses. The types of plaster differ from each other depending on the composition of the mixture. There are four types of finishing coat. The first and most popular of them is puttyplaster. This type of finish coat can be made of natural or synthetic gypsum. Both finish coats have similar properties, but it is worth remembering that a mixture with natural gypsum has a longer setting time and lower strength. Gypsum plaster, due to its corrosion-promoting properties, is not suitable for application on metal elements. Another type of this type of finishing material is lime plaster. Its characteristic feature is white color and good air permeability, thanks to which the walls can “breathe”. Due to the fact that the specified layer thickness (up to 5 mm) should not be exceeded, the possibilities of smoothing it after application are limited. The third type is cement screed, in which cement is the binding material.
This type of mixture is very durable and resistant to external factors. Thanks to this, it is possible to use it not only inside, but also on external walls. Coats of this type are usually enriched with hydrophobic elements that protect the wall against moisture penetration. The last of the types is polymer gypsum. It is by far the most modern type of this type of material. It is highly resistant to heat and moisture. It is also flexible, which ensures that it does not break under the action of design movements.is polymer gypsum. It is by far the most modern type of this type of material. It is highly resistant to heat and moisture. It is also flexible, which ensures that it does not break under the action of design movements.is polymer gypsum. It is by far the most modern type of this type of material. It is highly resistant to heat and moisture. It is also flexible, which ensures that it does not break under construction movements.
The use of putty
The way of using particular types of plaster depends on the surface on which it is to be applied and the intended use of a given room. Gypsum plaster is most often used to finish the spaces intended for living rooms and bedrooms. It is an economical and aesthetic solution. However, this type will not work well in the kitchen or bathroom, where there is much higher humidity. In this case, it is best to use a lime or polymer finish. The first one is recommended when the wall is to be covered with acrylic or latex paint. If there are to be tiles on the walls, putty is perfect polymer, which thanks to its flexibility will support the weight of the tiles. In the case of external walls, the best solution will be to use lime or cement coatings resistant to weather conditions.
The basis of finishing works is the proper preparation of the surface on which we are going to work. First of all, any defects in the structure should be filled. We can use putty for this purpose. On such a prepared ground, we can put finishing coat. It is worth remembering that when applying plaster, it is important to start work from the ceiling. During the application, we can use a trowel or a special roller designed for applying the finish. When working, we must also remember to apply the right amount of material. In the case of some types of finish, the layers cannot be too thick – up to 5 mm for lime finish and 3 mm for cement finish. It is assumed that it is best to apply two or three layers, which allows for precise grinding and a perfectly smooth surface.