Plaster masses and mixtures:

Plaster (plastering expedition) is formed after applying a layer of mortar to the surface of walls and ceilings. Plaster gives the surface an aesthetic look, protects against weather conditions and moisture and protects flammable elements of the structure against fire.

Depending on the thickness of the plaster, we divide it into traditional (with a thickness 1-2 Cm) and thin-film (with a thickness 2-10 Mm)

Division of traditional plasters according to the type of mortar used:

• Cement-lime plasters – Can be used both indoors and outdoors. Hardened plaster has high strength, is warmer than cement plaster and more durable than lime plaster.

• Lime plasters – Mainly used indoors, are porous and permeable to water vapour, so that the walls can "breathe".

• Cement plasters – They are characterized by very good strength and resistance to mechanical damage, they are also resistant to long-term water.

• Gypsum plasters – Used inside the building except for rooms with increased humidity (for example. Bathrooms). They give the opportunity to obtain a perfectly even and smooth surface. Plaster is characterized by good thermal and acoustic insulation. Provides a friendly microclimate – gypsum absorbs excess moisture and gives it away when the room is dry.

Division of thin-layer plasters depending on the type of binder:

• Mineral, among which plasters stand out:

– Cement, in which cement with the addition of polymers was used as a binder; are characterized by very high resistance to weather conditions, are resistant to fire, have high vapour permeability,

– silicate (silicate), in which the binder is water glass; plaster allows water vapor to pass through, and at the same time is resistant to rain; is characterized by high resistance to aggressive chemical compounds found in urban and industrial environments (large amount of exhaust gases, “acid rain').

• Resin (Polymer) – The binder is acrylic resin. Plaster creates a flexible water-resistant coating, with low water vapour permeability.

• Silicone binder is methyl silicone resin. Plaster is resistant to water, but does not block the penetration of water vapor from the building. Gives the wall surface hydrophobic properties, thanks to which it has less absorbability, is resistant to frost and gets dirty more slowly.