Facade paint is used for outdoor work. She has many advantages, however, buying paint is a thorough occupation. Consider all the nuances of the choice that will allow you to buy high-quality paints and varnishes.
Features of the
Facade paint has two main functions: it improves the appearance of the building and protects the plaster from aggressive environmental influences. The color palette of facade paints is varied. The fade resistance depends on the UV resistance. By the type of texture, paint is:
High-quality paint has a lot of advantages, due to which it prolongs the preservation of the finished surface of the facade. Let's consider the main advantages.
- Moisture resistance. It is able to contain moisture and prevent it from entering the wall. Due to this, the supporting structures do not damp and do not collapse, the overall service life of the entire structure is extended.
- Vapor permeability… The property of paint is to allow air to pass through the finished surface. This allows moisture trapped in the wall to evaporate, the oxygen mixture freely penetrates into the building, which has a positive effect on the freshness of the air in the house.
- Resistance to natural phenomena. An important property that determines the durability of the finish, its ability not to collapse under the influence of rain, snow, wind, hail. This way, the attractiveness of the facade is preserved for a long time. This paint is resistant to temperature fluctuations, its upper and lower limits. This is especially true for regions with hot summers and cold winters.
- Biological inertness and antiseptic properties. This material excludes the appearance of a medium for the reproduction of microorganisms, the components of the paint are components that are detrimental to fungus and mold.
In the modern market of finishing materials for the facade, there are many coloring compositions. They can be conditionally divided into several varieties. The division is carried out according to the main component of the solution, which acts as a binder. Subspecies are differentiated based on additional additives. The following types of facade paint can be distinguished:
Let's get acquainted with each variety in more detail.
This paint is a widespread type of polymer-based facade paint. It is divided into two main subspecies:
- water-dispersion (water-based);
- composition on an organic basis.
The characteristic qualities of acrylic paint are the following:
- it is applied to almost any type of surface (except for lime and silicate, although silicate in rare cases are allowed for use);
- it is characterized by strong adhesion (strength of the bond with the surface material at the molecular level);
- it sets quickly, has a short drying interval;
- water can be used as a diluent;
- such compositions are resistant to mechanical stress;
- this paint is elastic, when hardened, it does not shrink, does not crack;
- it is resistant to ultraviolet light and aggressive weather conditions;
Acrylic paint has vapor permeability and high waterproofing performance. It is resistant to alkalis and hypoallergenic (does not contain toxic components, therefore it does not cause allergies).She has no unpleasant odor. She:
- biologically inert (is an unsuitable medium for the reproduction of microorganisms);
- easy to clean with detergent and water;
- allows modification of the color shade to the desired;
- economically profitable (differs in an acceptable price).
This category includes dyes based on silicon-silicone resin, water and additives. This group of paints tends to exhibit the following qualities:
- they fit well on rocks and minerals, plaster;
- they can be applied to a work surface covered with mineral, acrylic or silicate paint, provided that it is intact;
- they are characterized by strong adhesion (it is recommended to work in protective clothing)
- a specific operating condition is the air temperature over + 2C;
- They are resistant to high and low temperatures (ideal for regions with extreme temperatures);
In addition, silicone facade paints are distinguished by:
- good waterproofing;
- high elasticity;
- strengthening the strength of the facade;
- resistance to ultraviolet rays;
- long service life;
- good vapor permeability;
- resistance to alkaline compounds;
- dust-repellent surface (self-cleaning due to rainwater and wind);
- biological inertness;
- compatibility with acrylic paint for solution preparation;
- resistance to shock and vibration;
- matte surface type;
- pleasant aesthetic appearance;
- relatively low consumption;
- average price range.
However, these paints are not very resistant to abrasion. A subtype of silicone-modified acrylic-based paints has enhanced characteristics.
This group includes facade paints with a liquid glass base and hardener additives. These paints fit well on lime, brick, foam and aerated surfaces. They are characterized by poor adhesion to organic coatings and surfaces already finished with silicone or acrylic paints. They are problematic to remove from the surface, even after a long period of time. These varieties are:
- resistant to atmospheric conditions;
- have high vapor permeability;
- have low strength against mechanical stress;
- fade and fade over time;
- have a narrow range of colors;
- differ in minimum consumption;
- relatively inexpensive.
This group includes paints based on Portland cement. They are well suited for painting on plaster, they lie flat on cement-lime and cement-sand plaster. They are distinguished by easy application, as well as high moisture resistance. They:
- resistant to aggressive environmental influences;
- have good vapor permeability;
- allow color change by means of tinting additives;
- prone to mold and mildew;
- are distinguished by high consumption and relatively low cost.
These formulations are facade dyes using hydrated lime as a binder. They are produced in the form of a dry mixture, ready-made solutions (paste). Their range of colors is limited to pastel shades, it can be modified with tinting additives, but bright colors fade quickly.
They are easily washed off with water (after the rainy season, the coating will need to be refreshed).
The features of such paints include:
- high vapor permeability;
- strong antiseptic properties;
- easily soiled surface (erased when touched);
- high consumption for painting;
- relatively low cost.
This category includes coloring solutions based on natural or synthetic drying oil with the addition of a coloring pigment. They do not need to be diluted, they fit perfectly on a wooden type of surface, but they cannot be used for coloring alkaline substrates. Their characteristic qualities are:
- high moisture resistance;
- low vapor permeability;
- long drying period;
- vulnerability to ultraviolet light;
- short period of service;
- relatively low cost;
- a wide range of colors;
- excellent appearance;
The consumption for painting depends on the darkness of the tone: with its saturation, the number of required layers and consumption increases.
This is a rare type of paint and varnish product. Its features include:
- wide range of colors;
- the possibility of staining at negative temperatures;
- resistance to aggressive weather conditions;
- protection of walls from fungal mold;
- short period of operation (4 years);
- highly flammable;
- low cost.
Such finishing materials are inherently closer to decorative plaster than paint. The features of such formulations include:
- the convenience of use;
- high plasticity;
- pleasant appearance and the ability to create 3D effects;
- small variation of color solutions;
- short period of operation;
- high cost;
- the possibility of strengthening with acrylic additives.
When choosing a paint and carrying out all calculations, it is important to take into account the amount of material that will be needed to cover the entire area of finishing work. First, it is worth calculating the area of the working surface. The wall area is calculated by multiplying the length and height. The total amount is obtained by adding up the areas of all the walls supposed to be finished. The dimensions of the windows and doors are subtracted from the total.
With a complex shape of the walls (with various bends and partitions), it is worth taking measurements with a tape measure.
On the packaging there is an indicator of the consumption of dye per 1 sq. m. It is multiplied by the total area. If the finish involves a multi-layer coating, the resulting volume is multiplied by the number of layers. To reduce the consumption of facade paint, you need to use a spray gun. The costs of the coloring solution depend on the consistency: the thicker it is, the higher the consumption. Typically, the flow rate is indicated for primed walls, the porosity of which is reduced by impregnation. If priming has not been done, the consumption will be much higher.
The approximate consumption of various types of paint (the numbers are not tied to a specific brand) looks like this:
- acrylic - 140-150 ml. / sq. m.;
- silicone - 130-140 ml. / sq. m.;
- silicate - 100-110 ml. / sq. m.;
- cement - 170-200 ml. / sq. m.;
- limestone - 170-180 ml. / sq. m.;
- oil - 100-130 ml. / sq. m. or 1 l / 9 sq. m.
To choose a suitable facade paint, it is worth considering a number of factors, starting from what kind of work the dye is intended for. If you mistakenly choose a paint for interior work, such a coating will quickly become unusable due to the lack of powerful protective properties. The compatibility of the type of facade paint and the type of coating directly determines the durability of the finishing work. For example, acrylic varieties work well on concrete, brick and wood surfaces.
It is important to take into account the operational characteristics of the dye
- If there is no ductility, cracking is likely to form over the entire surface during hardening and shrinkage.
- The paint should not contain toxic components that can cause an allergic reaction.
- It is worth paying attention to the drying time, temperature and humidity requirements when performing finishing work.
- The storage conditions of the facade paint and its shelf life are important.
When choosing a composition, you should pay attention to the protective properties. It is necessary to take into account the environmental factors that characterize the region, as well as resistance to mechanical stress (shock, abrasion, vibration) and the level of moisture resistance. If the coating does not allow air to pass through, the walls will accumulate moisture and damp, becoming unusable (it will be stuffy in the house, a specific smell will appear). The biological inertness of the composition is relevant for areas with high humidity.
In addition to this, it is worth paying attention to other aspects
- Resistance to ultraviolet rays (a particularly important parameter for southern sunny regions, affects the color fading and the integrity of the painted surface).
- Resistance to drop, minimum and maximum temperature indicators.
- Resistant to aggressive weather conditions (rain, snow, hail, frost, strong wind).
- Fire safety of the composition.
- Resistant to various chemical compounds used to clean the facade or present in the atmosphere due to emissions from a particular plant.
- Presence of antistatic properties (especially important for houses near roads, where dust from passing cars is a constant phenomenon).
It is worth paying attention to the aesthetic qualities of the facade paint and the warranty period of service.… Whatever the properties of the facade paint, if it is intended for 10 years of service, like enamel paint, it will not work for repairs designed for 20 years.
In addition, do not forget to take into account the manufacturer's rating
For information on how to choose facade paint, see the next video.