It’s one thing to build a house, it’s another to make it beautiful and durable. Modern construction knows many ways by which you can significantly increase the service life of a building. Brick varnishes are one of them.
Previously, no one covered brick walls with anything. Not everyone today is concerned with finishing brickwork. Do you need finishing, if the brick already looks great, you can understand by evaluating its performance.
No matter how good the masonry is, in regions with a harsh climate, and in Russia there are enough such territories, “lacquer help” neatly laid out rectangles will not interfere. The facade of a private house, treated with varnish, gets additional attractiveness and does not require repair much longer than its untreated “brothers”.
Bricks coated with a special varnish:
- protected from moisture penetration;
- become more durable due to the penetration of the product deep into the building material and partial changes in its structure;
- lose sensitivity to various chemicals, solvents;
- do not lose their original color under the influence of ultraviolet radiation;
- get increased resistance to high and low temperatures;
- become more attractive;
- extend the service life;
- get protection from fungal diseases and mold;
- gain the ability to repel dirt.
Lacquered surfaces are matte or glossy, and sometimes acquire the effect of a “wet stone”. The resulting decorative properties depend on the type of material used..
Advantages and disadvantages
The properties of the varnish are such that the product can be used both indoors and outdoors. When applied, paintwork does not roll or deform. The varnish is used for any brick walls, including those located vertically, obliquely and horizontally. The large number of benefits has led to a growing interest in the product. The demand for paints and varnishes is growing steadily.
Untreated brick is constantly exposed to moisture. Over time, it loses its strength, gradually collapses. The outer walls suffer more from this “ailment”. They are poured by streams of rain, hail beats, snow falls on them, dust and pollution stick. All year round, the facades are “attacked” by external forces. High-quality protection of the facade in the form of varnish treatment endows it with the ability to repel water, resist the destruction of the entire structure.
Lacquered masonry is protected from high temperatures. This ability is especially important for stoves and fireplaces. A brick or stone heating device becomes truly beautiful, even exquisite. Plus, it gains long-term fire protection..
The paintwork perfectly protects buildings from the appearance of white salt stains on brick walls, which can disfigure the masonry of houses and fences. Any stone surfaces are transformed after coating with brick varnish, they have a smoothness and shine. Special properties of paintwork materials do not allow dust to accumulate on the masonry.
If you use a varnish with a high gloss content, the walls take on a wet effect. A country house with such processing becomes like a fabulous tower. The use of “wet stone” indoors favorably distinguishes the masonry. Designers often use this method to focus attention on a specific element of the room. LKM on stone make facades more attractive, emphasize the richness of texture, speak of the wealth of the owners of the building.
The disadvantages include the presence of specific odors, as well as the need to work with the use of personal protective equipment for both skin, eyes and respiratory tract.
According to their composition, varnishes for bricks are divided into four types:
- fireplace (or stove).
Polymeric varnishes are based on alkyd resins and acrylic polymers, as well as organic and inorganic additives. Each additive affects the enhancement of certain properties and characteristics. Some affect wear resistance, others – on resistance to aggressive environments.
In solvent-based varnishes, silicone resins are used as the basis. Such paintwork materials penetrate deep into the body of building materials, create an elastic coating. The transparent layer does not crack, and the presentable appearance of the masonry remains throughout the entire service life.
Solvent varnish is highly flammable. You need to work with him with extreme caution..
Acrylic varnishes have a multicomponent composition and are intended for interior use. Acrylic mixtures are made on organic solvents, which protect against the formation of efflorescence, prevent the formation of cracks and other mechanical damage.
Fireplace paints and varnishes can be characterized as heat-resistant, fire-resistant and heat-resistant. The varnish prevents condensation. Used for decorative coating of fireplaces and stoves, suitable for facade cladding.
On request, it is possible to obtain a matt or glossy finish with a specific gloss quality. Special additives make it possible to treat the plane in such a way that a “wet effect” is formed. Paints and varnishes are produced in cans or buckets of various sizes, and as an aerosol in cans.
Among the foreign brands, the most famous are German Pufas and American Petri. German varnishes are of high quality and the same cost. In our country, American varnishes are popular, creating a “wet effect”.
A well-known Russian brand – Neomid. Produces semi-matt lacquers for interior use Neomid STONE. The widespread demand is due to the complete absence of a poisonous toxic odor. Another domestic manufacturer is Chief Technologist. Heat-resistant varnishes are made from foreign raw materials.
The choice of varnish depends on the place of its application. For facades of houses and other outdoor structures, preference should be given to materials that form a moisture-resistant film. The varnish must have the ability to successfully resist the effects of sunlight, as well as have good decorative effect..
Other requirements apply to oven varnishes. The important thing here is the absence of toxicity, resistance to heat. For interior decoration of structures made of brick, natural or artificial stone, acrylic and silicone varnishes are suitable. In the construction market, the choice of varnishes is so great that it will not be difficult to choose a mixture that is suitable for both the required characteristics and cost..
The principle of working with varnishes is similar to painting. First of all, you need to prepare the surface to be treated. Walls should be cleaned of dirt and dust, cracks should be putty, build-ups should be cut down, and recesses should be filled with plaster or putty. If the facade has been painted before, the paint should be removed completely.
Aligned walls need to be sanded with coarse sandpaper and then washed. A household detergent is suitable for this. After drying, a second inspection is carried out. The revealed shortcomings are eliminated. A dry clean surface is primed. It is advisable to take a primer and varnish from one manufacturer.
Application is done in several ways: by brush, roller or spray. In the latter case, the mixture (if it is not in an aerosol can) must be mixed with a solvent to reduce the density. If this is not done, the spray gun will not cope with heavy varnish..
Works can be performed in a wide temperature range of -10 … +30 degrees. But it is best to do repairs in the summer with warm dry weather..
The varnishing starts from one of the upper corners, gradually going down. On large areas, it is convenient to work with a 20 mm nap roller. Small elements are processed with a brush with natural stiff bristles. Neighboring strokes should be applied with an overlap of a few millimeters. The varnish is applied in two or more layers. Each subsequent layer is applied after complete drying (absorption) of the previous.
Maintenance of the varnish coating consists in processing with a mild detergent at a frequency of 2 times a year..
See below for more details.