Paint for exterior plastering: how to choose

Gusevsky Andrey Anatolyevich

Paint for outdoor use

Paint for exterior plastering should be selected according to the environment. After all, this coating can be in any room and on the street as well. So here its parameters are important, for this there is an instruction on the package and it needs to be studied. Dyes are also selected in their composition, the compatibility of surfaces and the durability of the coating will depend on this.

These are the issues we will consider today. Also on the video in this article and photo you can find out a lot of additional and necessary information.

Making a dye choice

Paint for plaster is divided into two types. This is a plaster paint for interior use and for interior surfaces. For exterior decoration it is quite possible to apply for internal work. And in turn, internal can only be used for internal surfaces (see Paint for interior wall decoration: how to choose).

Any of them is completely applied with your own hands, then the final price of the finish is significantly reduced, though you must first choose the right dye, this will be discussed later.

Attention: If you have a large finishing area, then it is better to use a spray gun for plastering, in this case you will significantly reduce the time for painting and apply a dye layer as evenly as possible.

Facade paints

Direct pointer to quality facade paint is its resistance to fading, pollution and peeling. Choosing a good product and preparing the foundation is the key to the longevity and beauty of our home.

So:

• Even after several years, the painted facade should be pleasing to the eye. If the walls become dirty, then with the return to its original form should not be a problem, as well as fading paint, no matter how dark it may be.
• Being in the bank, branded paint should have a thick consistency, and when blown up - systematically become more liquid. This helps its uniform application, which, however, should not mean dripping paint from the roller.
• All these advantages of high-quality paint have, of course, a direct opponent - a high price, but this is also a guarantee of the desired result. In addition, the process of painting the facade (see How to paint a house outside with your own hands) Is not the easiest thing, which means calling painters, using forests, and also indicates that saving on paint is not worth it.

Attention: Using a quality product from the very beginning will help to save the facade from re-painting much better than its cheap counterpart, due to its resistance to various adverse factors.

What are the colors

To the highest degree, the properties that the paint will possess depend on what it consists of. The most important component is not only paint, but I am of any paint material: primer (see Primer for walls for painting - types and tasks), putty, varnish - is a binder, which determines the quality of the future coating.

It is also called a film-forming agent, due to its interaction with solid surfaces, namely, the formation of a film (this occurs after evaporation or drying), which differs in the degree of adhesion to the substrate.

Varieties of exterior dyes

According to possible types of solvents, paints are divided into:

• Paints on organic extractants (such as white spirit) form a distinctively densified film with a low level of water vapor transmission (this does not apply to paints based on plyolite resins). Among their disadvantages are toxicity and insecurity when used in a fire room. In contrast, weather resistance and the possibility of use without loss of quality at subzero temperatures can be attributed.
• A well-known plus of water-soluble paints is environmental friendlinessThis is achieved by replacing flammable (and often poisonous) solvents with ordinary water.
• This type of paint, in turn, is divided into paints, which are based on water dispersion (there are a large number of different polymers). They are also called latex (see Latex paint: how to work with it) and emulsion. And the second subtype is paints, in which mineralite, lime or liquid glass play the role of a knitting material, and they are mineral.

Water dispersion paints

Water dispersible paints for external use in their structure retain adhesive substances as if “suspended” in the format of micro particles in H2O.

Characteristics of waterborne paints

Attention: The main basis on which such specialized paints for facades are produced are synthetic polymers and various emulsions of silicone resins. Their pleasant feature is absolute non-toxicity, the ability to dilute in water to the desired density and quick drying.

• The film-forming agent in vinyl paints is a dispersion of polyvinyl acetal or other copolymers of vinyl acetate, which are not very expensive, but also water resistant.
• Acrylic (acrylate) paints, in which the dispersion of acrylate copolymers plays the role of a film former, are very qualitatively combined with the foundation. Among their other characteristics: reduced vapor permeability, which leads to their use, for the most part, for concrete and cement-fiber surfaces. On the other hand: they cannot be used for application on silicate or lime coatings.
• Based on the dispersion of silicone resins, silicone paints (siloxane, silane, organosilicon) are made. They are distinguished by their resistance to moisture and “magical” self-cleaning features. When compared with other polymers used in industry, the binder material of these paints does not become softer in the heat and the galvanic charge in it is always neutral.

Attention: Paints based on acrylic and vinyl, as well as silicone resins are not only water-soluble, but also organ-soluble.

Mineral paints

Mineral paints by their binder are divided into:

• Lime-based paints based on slaked lime. The reliability of the lining, they are obliged to occur in the air space the process of carbonation of lime. Therefore, these paints are stored either as pigmented mixtures or as pastes, to which pigments are added immediately before application. Pigments need to be alkali resistant in order to interact normally with the paint, and this somewhat narrows the range of colors available.

Limestone paints among their fellows seem attractively cheap, but also do not differ in durability and safety. Every year they are used less and less, but when it comes to the restoration of architectural monuments, other paints can not be used.

• Silicate paint, the role of the film former in which liquid glass plays. This fact significantly limits the possible color palette. In addition, the application of such paint should be provided to an experienced painter.

Attention: Please note that it can not be applied over silicone paint, no matter how good it is. The same goes for acrylic. But if before that there was lime or silicate paint on the surface, then you can safely apply layers again and again.

• In cement paints the connecting substance is Portland cement (situationally: white or colored), which in itself already requires the use of alkali-resistant pigments. Since such paints themselves do not retain water very well, they add up to 15% slaked lime to increase this parameter, and 1% hydrophobic substances due to low weather resistance.

The result is weatherproof and steam-permeable paints, the area of ​​use of which is the same as that of lime. However, in terms of fragility, cement paints even surpass them, so they do not peel off for so long.

Criterias of choice

Owners of houses, mostly residents of busy streets or an industrial area, often confirm that after a few months their facade has already lost its color. For this reason, they are looking for such paints that would provide maximum dirt resistance.

Caution: Paints on which dirt could not settle have not yet been invented, but there are those that prevent it from absorbing into the surface.

• Such paints form hydrophobic shells with self-cleaning properties. As a result, the dirt is simply blocked on the surface, after which it is easy to wash off, which often happens during precipitation.
• Hydrophobic properties fully take effect approximately a month after staining. Silicone paints have the best “repulsive” attributes, silicate and acrylic paints are good, as well as paints modified with silicone polymers. Alas, when buying it is impossible to find out what is the resin content in the paint (this is what has the greatest effect on its effectiveness). For this reason, it’s worth using a product already tested by someone you know.
• If after a few years the facade does not lose its original color and remains without blots, this is a significant argument in favor of the brand. The next time you should buy their own product.

Attention: When choosing a paint, special attention should be paid to the degree of gloss: the higher it is, the higher the resistance to pollution, i.e. dirt will be better washed off. And one more little hint: on dark paint, in comparison with light paint, it is not so easy to notice dust.

• On the packaging of most paints, you can find information confirming its vapor permeability. This is a conscious step of the manufacturer, because every person wants his house to “breathe” and be “healthy”.
• Another reason why the importance of this is not diminished: depending on the density of the outer part of the facade, there is a transition of water into liquid from gas, which leaves in the direction from the room to the street. It is possible that subsequently this paint will exfoliate not from the outer surface, but from the inside. The likelihood of this increases significantly if the paint was applied to a primed surface.

Color Tips

Any developer, choosing what the facade of his house will look like, where which color should be used, encounters problems: how to succinctly and not easily combine each element of the facade; How to make buildings individual among others, but not create confrontation?

In cases where an appeal to the architect is unavailable, it is recommended to adhere to some simple but effective rules that will help to achieve a positive result when using home decoration:

The use of facade dyes

• For the facade, it would be wiser to take light paint from a palette of pastel colors. The facade painted in this way will more easily pour into the environment and in this case it will be easier to choose the color of the roof.
• If you are afraid that your home will look monotonous, then use two shades of the same color, for example, highlight the window openings and other individual elements with the lighter ones.
• Obviously the color of the roof should be darker than the color of the walls.Of course, you can do the opposite, but in order to get a beautiful and aesthetic appearance, the intervention of specialists in this case will be required.
• If the facade after painting should be multi-color, then when considering various options, all paints and materials should have one common “parent”, so that in the end the chosen combination was harmonious and orderly.
• Even the most serious and gloomy facade can be made more lively by colorfully highlighting its individual elements: door and window boreholes, spros, railings, chimneys, foots, etc. If possible, this method should definitely be used, not forgetting, of course, about general style of the building.
• When using several tones of paint, you can distinguish the horizontal separation of the facade, completely changing the sensations of the architectural object. For example, if the lower part of the house is darker than the upper, then the building as if “stretches up” and will look more refined.
• If, on the contrary, the roof and the attic are darker, then the whole house will gain depth and solidity. It is wrong to forget that the impression of the building also depends on the external background, the environment in which it is located, therefore it is extremely important that the appearance of the building is not opposed to the local surroundings.

The paint for the walls on the plaster is quite different in its characteristics and its price can be high, but the main thing in this matter is the durability and quality of the coating. Therefore, it is worth giving preference to trusted European manufacturers, you should not save on this.