The correct coloring of facade - this is the most urgent problem of contemporary society. Facade is called not simple to serve “after face” of house, but also to ensure its protection from the weather conditions. Very frequently the facade bears the tracks of atmospheric actions (variable temperatures, the variable and increased humidity, ultraviolet radiation, wind), biological actions (mould, caps), industrial and ecological environmental pollution. Peeled or lost color, spotty or completely finished in no way facades - sufficiently sad phenomenon, you will agree. This is why painting facade becomes for many people present problem. How to paint facade so that it would appear beautifully and would not be destroyed during the long time?

First step - selection of the type of paint and varnish coat. All paints, intended for finishing the facades, relate down the protective-decorative coatings, i.e., they they must not only decorate construction, but also reduce the level of its destructive actions of environment. The characteristics of the selected paints must correspond to those conditions, due to which will be exploited the coating. For the facade works water acrylic materials are the best version.

Water materials are let out in essence on the base of three types of the dispersions:

• polyvinyl acetate ([PVA])
• butadiene-styrene (БС)
• acrylic (АК)

All three have their advantages and their deficiencies.

Thus, dispersions [PVA] are irreplaceable before the glues on the tree, and here paints on their basis are obtained hydrolabile and therefore have very low field of application they despite the fact that stand they inexpensively. True, there are different water-resistant copolymers [PVA], but nevertheless before the paints they are inferior down acrylic dispersions.

Butadiene-styrene dispersions are good before the glues, which require water resistance, but they have the limited light resistance, which makes their application before the materials, intended for the external works, undesirable. Paints on a basis of this type of dispersions are obtained inexpensive, but to use them is possible only for the decoration works indoors.

Acrylic dispersions are more expensive than both mention aboveed, but precisely they are most universal. Not randomly precisely on the basis of acrylic dispersions are made more than 70% all produced in Europe paints.

It should be noted that acrylic water paints not only conquered the construction market of Europe, but also they invade the more complex branches, such as automobile and shipbuilding. But are such the advantages of acrylic materials in comparison with the oil and alkyd paints?

1. Longevity. Acrylic paints on the facade serve 8-12 years, in certain cases - of up to 30 years, and oil - 1,5-3 years, alkyd - 3-5 years.
2. [Eologicheskaya] safety. Acrylic paints do not separate harmful substances, first of all solvents both during the putting and with the operation.
3. Good hygienic properties. Paints form “breathing” coating, permeated for the vapors, but liquid-tight, which makes it possible to easily clean surface in the case of pollution.
4. Fire and explosion-proof character both during the storage and the putting and during the operation of coatings.
5. Simplicity and convenience before the work. Paints dry in 30-40 minutes with room temperature and normal humidity.

Second step - determination of the type of surface. Paint and painted surface must approach to each other, then them “joint life” is long and beautiful.

For the mineral surfaces of the type of concretes not all aqueous paints are acceptable, since they " draw out” alkali on the surface, [obesshchelachivaya] the upper layer of base. This contributes down the destruction of metal insert, and also it is possible to lead down the accelerated fading of coating itself. Therefore, in cases when to work it is necessary with the new, unplastered concrete, should be used water acrylic dispersions with the high level of resistance to alkalis. The level the pH of such paints must exceed the level of [rN] of concrete. The use of a lye resistant acrylic paint will protect coating your facade from the fading and spotting out, and concrete base - from the destruction.

Besides mineral surfaces to characteristically also collect moisture with a temperature decrease, and with the increase - to return it in the form pair. Therefore masonry paints for such surfaces must have a structure, which does not pass water before the condensed phase, but letting out it before the gas (vaporous) form, otherwise pairs it detaches the film of paint. The paints, which do not give to the facade of building to breathe, will provoke the accumulation of moisture inside, which will lead down the destruction of the most mineral base.

After determination of the type of surface very important is the quality of surface preparation for the application of coating. If we speak about the periods of the service of coating, then the quality of surface preparation is the important factor (even more important than the quality of very paints). The purpose of surface preparation is its strengthening, improvement in the exterior view and increase in the adhesion to the paint.

Special attention down surface preparation should be paid if it is struck by mould. Mould - formation of brown, black or gray fungus spots beyond the surface of treatment. Cap grows on the concrete base, the film of paint and varnish coat or on other organic material. The solution of problem is reached by using of special antifungal paints - impregnations, primings and the like “which priming, it is such and coating” - this old [malyarskaya] truth is today more urgent how if that not was. The use of acrylic paints, which contain antibacterial additives, is important.

The contemporary market for paints strikes for the sake of its variety. In order to select the most acceptable version of painting facade, which satisfies all operating conditions of object, necessary to consider the factors enumerated above. Thus, painting facade requires to itself the increased attention and the thought-out approach. All stages of technological process must be taken into account and thoroughly observed. Only in this case the success of the matter is guaranteed.

© STROY.MD Of [moldova]. Kishinev