The contents
- Decorative and technical characteristics of facade coatings
- Selection criteria of coatings for facade
- Choosing exterior paint
Qualitatively, the color of the facade of the building gives it a unique look and also allows you to purchase additional protection from the negative effects of the environment and to disguise some defects on the surface of the walls. The right choice of paint for the facade is a guarantee that the house will gain an attractive appearance for a long time. Therefore, you should know some requirements for facade paints.
Decorative and technical characteristics of facade coatings ↑
Tinting – it is possible to obtain paint of required shades by adding white in various colors.
Sitostanolü is the ability of paint to maintain its original period for a long time, not reacting to the sunlight.
Adhesion – an indicator of how the material can interact with the surface.
Atmosferostojkostis is a measure of material resistance to adverse weather effects: humidity, precipitation, temperature changes.
Water vapor permeability – the ability of a material to conduct vapor. When choosing exterior paint, you should remember that it should not pass water, but through it should pass freely as the accumulation of condensate under coating layer has a destructive effect on the base.
Drying time, depending on the ambient temperature and thickness of the paint layer.
Consumption – the amount of material required for processing of 1 m?. This figure largely depends on the type of treated surface, type of paint, method of application of the material.
Selection criteria of coatings for facade ↑
The majority of people who decide to spend painting the facade of his house, not sure how to actually choose an appropriate paint. For the proper choice of a suitable composition and quality treatment, you should follow some simple rules:
- one of the main criteria that you must consider is the type of the processed surface;
- the cost because the cheap material is not able to provide reliable protection and excellent appearance of the house;
- before painting the facade should be carefully prepared the surface and primed a wall for what to pay attention to the compatibility of the primer and coating material;
- shelf life, with a direct impact on the quality of the paint.
Choosing exterior paint ↑
When choosing exterior paints, note that for each type of surface has special coatings, with unique characteristics. For example, the paint coating for masonry must have high performance, which are inherent in the compounds to mineral surfaces – vapor permeability and good covering power. Paint material concrete must be resistant to alkaline environment and have a high porosity.
There are the following main paint materials for facades:
- Acrylic exterior paint. Is based on acrylic resin, non-toxic, odorless, has a high quality moisture protection and resistance to contamination. Perfectly applied on any mineral primer, organic fillers, as well as on wooden and metal surfaces, except limestone and silicate.
- The silicate paint for facades. Is based on liquid potash glass, which gives the opportunity to use a paint material for treatment of concrete, stone, brick and plaster facades. Silicate paints have a good water vapor permeability and moisture resistance, elasticity and resistance to sunlight. An improved version of the silicate composition is solicitously paint or polysilicon material which is suitable for processing of the old walls and organic surfaces. The advantage of this type of paint is odorless, but the disadvantage of this coating composition may be its high cost.
- Silicone coatings for facade. This type of paint is considered the most durable. Is quality protection from dirt and moisture and also possesses the ability to self-cleaning and attractive appearance. Silicone exterior paint is widely used in the restoration works and protection of monuments.
However, there are certain conditions for such compositions. So, for example, at the time of painting the temperature of the environment must be at least +5?C. do Not apply silicone paint peeling off surfaces and walls, affected by fungus and mold. But after drying you get high-quality and durable paint.
- Paint for wooden facades to find the most difficult. This is because wood absorbs moisture, rot and flammable. Therefore, when buying material for painting the house with a wooden façade should take into account all these factors. The best option is to paint which has high elasticity, moisture resistance and good hiding power.
- For plaster facades. Such a composition should have a number of properties inherent in mineral surfaces and the choice should take into account the water vapor permeability, moisture resistance, elasticity and covering ability.
All paint materials are divided into the compositions, produced on the basis of organic solvents and water-soluble.
Water based paint for facades ↑
For painting of the facades of the most commonly used water-soluble coating materials with the required gas and vapor permeability, fire resistance and no odor. Such coatings usually come in white color and are easy to tinting. In turn, water-soluble coating materials can be dispersion, silicate and silicone.
Lime paint has a good resistance to adverse environmental conditions. A similar composition can be coated plaster, brick and concrete surfaces. This coating is very often used for painting of the facades, however it is too quickly washed away or tarnish.
Dispersion paints resistant to mechanical and atmospheric influences. Very often, this type of paint is subjected to mold formation and occurrence of fungal diseases.
Cement coatings are mineral powder composition based on white Portland cement. Depending on the processed surface of the paint is diluted with water or a special solution. This coating gets dirty easily and not able to protect the facade from the negative effects of moisture.
Organic compounds ↑
Paints made with organic solvents, have certain advantages over other paints, namely: high quality of surface treatment, good resistance to mechanical impact and low temperatures. However, there are disadvantages in view of the high toxicity and slight Flammability. Organic paints include enamels and oil paints are suitable for painting of surfaces of any type. However, under the layer of such cover is quite frequently a condensate, leading to cracking of the surface.
The adhesive compositions are based on organic polymers such as cellulose, casein, starch and polyvinyl alcohol. Such coatings create a matte and «breathable» coating, but not recommended for painting of the facades, due to the low moisture resistance.
Consumption calculation ↑
It is understandable that nobody wants to bear the extra costs of buying the paint in excess. To avoid this, it is enough to calculate exactly how much you will need material for painting facade of the house. True, there are some nuances.
To accurately calculate the amount of material should be the area of the facade multiplied by the specified on the package, a flow rate of 1 m?. If the packaging indicates that the 1-liter bottle designed for 20 m?, then, 1000 ml:20 m? = 50 ml/m?, this will be the paint consumption per 1 m?. Now the area of the facade multiplied by the calculated value and get the required volume of material for one layer.
The facade must be painted at least two layers and accordingly received the amount of dye multiply twice. Note that consumption for 1m? specified by the manufacturer was calculated for perfectly smooth, uniform and well-primed surface, the optimal temperature and humidity. In real conditions it is very difficult to achieve and therefore it is necessary to purchase material for 10% more than calculated. Besides, it is recommended to purchase the primer from the same manufacturer, and bought paint.
