Facade paint on plaster - characteristics, types, features

Gusevsky Andrey Anatolyevich

Facade paint on Tikkuril plaster will transform your house

Private houses, made of bricks or blocks, are often plastered on the outside to protect the walls from moisture and mechanical damage, reduce heat loss, improve the appearance.

The last task in this case is only partially solved: the surface of the walls becomes flat, but gray and dull. However facade paints plaster easily cope with this problem, allowing you to give the house any color and design.

Features and characteristics of facade paints

The main advantage of facade paints in addition to giving the building an aesthetic appearance is their ability to preserve the positive properties of plaster, to protect it from all sorts of negative influences.

What properties should a material have?

High-quality facade paint on plaster should meet the following requirements:

• Have vapor permeability, do not cover the pores of the plaster with an impermeable film. Otherwise, condensate collected on the surface of the walls will accumulate under this film, not evaporating and leading to the multiplication of fungi and the destruction of the paint layer;
• Resistant to weathering. First of all - do not let moisture from the environment through you, maintain your properties under the influence of frost, sunlight, a sharp change in temperature;

Gases and steam should pass freely through the paint layer, while water should not leak under it

• Do not fade in the sun, do not change color under the influence of UV rays;
• Possess good adhesion, that is - increased adhesion to the plaster and ensure the strength of the coating;

Note. The quality of adhesion depends not only on the characteristics of the paint, but to a greater extent on the preparation of the surface for painting.

• Resist mechanical damage - scratches, chips, etc .;
• Be convenient to apply, dry quickly enough and gain strength;
• To have dirt-repellent properties or easy to clean without loss of decorativeness.

Painted facades can be washed

Types of facade paints

In terms of their decorative properties, such paints differ in color and degree of gloss or dullness. Moreover, most species lend themselves to tinting - the introduction of the bulk of the pigment to obtain the desired shade.

Painting of a plastered house outside is most often done with matte paints that well hide minor coating defects, while gloss only emphasizes them.

They differ in composition and base material:

• Facade acrylic paint - the most popular of the existing ones. The binder in it is acrylic polymers that perfectly protect the plaster from weathering. The composition can be diluted with water, tinted. It does not have a pungent odor, does not interfere with gas exchange, and prevents the formation of mold. An important advantage is the low price in comparison with other types of similar materials.

In large construction markets, tinting is usually free, the desired color is selected according to the tinting table.

• Facade silicone paint for plaster - one of the most high-quality and modern compositions for decorative decoration of exterior walls. The synthetic resins included in its composition reliably protect them from atmospheric moisture and provide reliable adhesion to a rough plastered surface.

Note. The cost of silicone compounds is much higher than acrylic, but it is much more durable. Subject to high-quality painting in compliance with all technological requirements, the decorative layer will last up to 25 years, while the service life of the acrylic coating is not more than 10 years.

• Water-based silicate paints have a unique ability to penetrate cracks, gluing them and hiding the defects of the plaster layer. Due to their high vapor permeability, they are often used as a decorative coating for creating systems of external thermal insulation of facades with mineral wool heaters.

Silicate-based facade paint Tikkurila

• Perchlorovinyl facade paint is a suspension of coloring pigments in a solution of perchlorovinyl resin. Despite the low cost, rich colors and the ability to apply even at low temperatures, it is rarely used for private house finishes. Its disadvantages include flammability, a pungent smell and low ductility, due to which the dried paint cracks and crumbles at the slightest deformation of the facade.

Application

Before painting the plastered house outside, it is necessary to finish all other work related to installation and rough finishing. Work is carried out in dry weather at an air temperature of at least 8-10 degrees.

Extreme heat is also not welcome, as it contributes to drying the paint too quickly with the loss of some physical properties.

How much paint is needed

Having decided on the type of paint, you should decide how much to buy. The material is not the cheapest, so it’s too wasteful to get the extra amount. On the other hand: if it is not enough, you will have to buy it, risking not getting into the color, which may be slightly different depending on the party.

The required amount of paint is calculated based on the following parameters:

• Consumption per square meter;
• The number of layers.

In turn, the consumption depends on the smoothness and porosity of the plaster: the less rough and porous the surface, the less it will be. As a rule, the instructions from the manufacturer contain information about this parameter, you just have to multiply it by the area of ​​the facades to be painted.

The thickness of the applied layer also matters

Now for the number of layers. There should be at least two: primer and covering. The composition for the primer layer can be diluted with water or solvent, the amount of which should not exceed 5% of the volume of paint.

A two-layer paint system is applied to even and smooth substrates. If they are porous and rough, it is advisable to apply a third layer to further protect the surface from moisture.

Note. It is allowed to apply one coat of paint, but only if the plaster was done with a tinted polymer mixture in the color of the future facade.

Each layer is applied only to the dried out previous one. Drying times are also indicated by the manufacturer and are dependent on environmental conditions.

Surface preparation

The most important thing in the process of painting facades with your own hands is the quality preparation of the surface.

Mandatory requirements:

• The plaster must be dry and durable. It is not allowed to shed when exposed to a brush or roller;
• The base must be cleaned of dirt, oil stains, dust, layers of old paint. If there are metal parts on the facade, they are cleaned from rust;
• The prepared surface must be primed to improve adhesion to the paint.

Start staining immediately after the primer dries (see Primer for walls for painting - types and tasks)Otherwise, dust will settle on the walls again, which will impair the adhesion of materials.

Painting

You can’t tell a lot about the process itself. It is done with a brush, roller or spray gun. When painting by hand, each subsequent layer is applied in the direction perpendicular to the previous one.

In the photo - painting the facade with a roller

Tip. When using a spray gun, do not forget to protect windows, doors and facade design elements from paint getting on them.

Conclusion

If you chose plastering and painting of all types of facade decoration, buy high-quality materials so that you don’t think about repairing in the next 10-15 years. Good paint will not only decorate your home, but also protect it from the negative effects of the environment.

In order not to make mistakes, watch the video in this article, which describes the entire process in detail.