Technology for preparing and painting a brick wall using facade paint for outdoor use

General requirements for paint for exterior work

The outer walls of a building often deteriorate due to rain (especially if there is no drainage system, no visor or leaky frames), ultraviolet radiation, steam release (problems with thermal insulation). Poor exterior finish "wets" the brick, causing it to deteriorate.

Before buying paint, you need to find out the reason for the destruction of the walls.

You need to adhere to some rules - not all paint is suitable for chimneys.

The choice of paint largely depends on the environmental conditions.

To restore and protect a brick wall, you can choose a moisture-resistant paint and additionally a water repellent - a solution with organosilicon compounds, which is added to water or a solvent (also suitable for concrete).

The solution will prevent moisture from absorbing into the brick.

Note: one of the main reasons for brick failure is its poor quality.

How to choose the right paint for exterior decoration: the main criteria

If the exterior walls are covered with salt deposits, then choose facade paint for exterior brickwork, which is as resistant to alkalis as possible (latex forms a protective film through which salt cannot break through).

White plaque on surfaces is not always visible - in some cases it can be completely transparent. A pronounced coating of salt is called efflorescence - the more alkali is contained, the more it is released on the surface of the walls.

There is always alkali, but in different percentages.

Ultraviolet radiation and weather conditions

Over time, under the influence of sunlight, the wall begins to fade. On the one hand, the brick can be of a dark shade, and on the other, light. To avoid such differences, use paint that protects the coatings from tarnishing.

Brick paint for outdoor use must be resistant to temperature extremes, moisture and snow must not pass into the joints between bricks.

Paints and varnishes must have good vapor permeability - this means that after drying, the paint must allow air to pass through (especially, this applies to the premises where the interior decoration was carried out).

It is important that the wall "breathes", then the masonry will be more stable. Do not forget about the description of the characteristics on the can - along with the listing of the composition, the paint consumption per 1 m2 is indicated on the tube

Do not forget about the description of the characteristics on the bank - along with the listing of the composition, the paint consumption per 1 m2 is indicated on the tube.

The less specified, the more economical the material will be consumed. Each bank has a different value. In the description, you can find out the time when you need to update the facade.

An important factor when choosing a paint is a high susceptibility to mechanical damage.

The paint is especially sensitive to abrasive dust - a powder obtained as a result of grinding or polishing surfaces. The material that is "sharpened" loses particles, scatters, which means that the paint can peel off.

The color of paint for bricks for outdoor use can be any, the main thing is to choose waterproof compositions with protection against fading.

As for the walls in the room, the UV light does not affect the walls in the room as much.

Do not forget about adhesion - the better the adhesion of the surfaces of dissimilar solid or liquid bodies in the paint, the longer the service life of the brick will be (good adhesion should be not only with the brick, but also with the cement mortar).

If the adhesion is at the highest level, then the solution can be applied to the walls without a preliminary primer, and this is a plus.

When heating the wall surface, the paint must be plastic and compensate for the thermal expansion of the walls.

Another important quality is the ease of application and speed of drying (it is not advised to take quick-drying paint). The shelf life of paints and varnishes depends on the composition and its manufacturer.

The maximum term is no more than 9-10 years

The shelf life of paints and varnishes depends on the composition and its manufacturer. The maximum term is no more than 9-10 years.

After this period of time, the external facade will have to be renewed again.

What types of paint are suitable for bricks and how to choose them

All commercially available paint materials are divided into two large groups - facade and for interior use. The first category is characterized by the presence of greater resistance to moisture and temperature extremes: facade paint can be used both outdoors and indoors.

Brick paint requirements:

1. Moisture resistance. This is especially true when it is necessary to paint street brick walls. It will not be superfluous in those cases when the interior in the kitchen, bath or hallway needs updating.

1. The ability to pass steam. Most types of bricks are vapor permeable, and if you create a "deaf" layer on top of such a material, this will provoke the accumulation of condensation under the paint layer. As a result, the paint begins to flake off rapidly.

1. Good hiding power. Flexible paints are best for decorating rough brick surfaces. Due to some plasticity, such a finish will not crack during seasonal or shrinkage deformations of a brick wall.

1. Resistant to temperature fluctuations. This is especially true for the outer surfaces of a brick wall, which experience all the charm of climatic influences. Good heat resistance of brick paint will also be needed in cases where additional finishing of brick stoves and fireplaces is carried out.

In general, all paints used for painting bricks can be water-based or organic-based.

Each of the compositions of this type has its own specific application:

Nitro enamels, oil dyes. They are well absorbed into bricks, tolerate sunlight and mechanical stress. However, after their application, a strong hydrophobic film is created on the surface of the material, which completely clogs the structure. As a result, condensation begins to appear on the brick wall.

Nitro enamel is not the best choice for painting bricks

Organic paints are not recommended for use in the interiors of residential premises, as this will provoke dampness of the walls and violation of the internal microclimate. They are more suitable for decorating brick facades, fences and balconies.

Water-dispersive. An excellent option for painting bricks is water-based facade paints. They are presented in several varieties, each of which has specific characteristics. Liquid glass acts as a binder for silicate materials. The degree of their resistance to weathering is rather insignificant, which is reflected in a rather short service life - up to 3 years.

Water-based dispersion paint is a good option for painting bricks, but its service life is only 3 years

Acrylic facade compounds are much stronger and more reliable: after hardening, they can be dry cleaned. They also increase the ability of masonry to resist moisture.

However, the most suitable option for a water-based brick paint is an acrylic-silicone solution, which can last up to 10-12 years. After drying, the material forms a vapor-permeable layer with good hydrophobic and anti-vandal characteristics. The cost of this paint is quite high, but the result obtained fully compensates for all costs.

Acrylic silicone paint is one of the best options for painting bricks

Epoxy. The composition of this material may differ slightly: in some cases it contains toxic components, which should be checked with the seller. In general, all epoxy paints have good brick adhesion and strength. To increase the resistance to climatic influences, after the paint has set, it can be hidden with a layer of varnish.

Epoxy paint is durable and adheres well to bricks

Mineral. The basis of mineral paints is cement. They can be used to decorate brick facades, fences and balconies. After hardening, the coating resists moisture well, temperature fluctuations and mechanical stress. Usually, mineral dyes are used for outdoor use.

Mineral paint works well for bricks

Silicone. Excellent for very smooth brick walls with low adhesion. Basically, silicate brick has such characteristics. There is a line of heat-resistant silicone paints especially for finishing stoves and fireplaces.

What to consider

Many people think whether it is possible to paint a brick, and the answer is simple. If you do it right and use quality materials, then this is done without problems.

But you should understand the following:

Once you start work, there will be no turning back

This process is practically irreversible. If you start to do the work, then it will not work to return everything to its original place. Even if the wall is made of M100 or M75 bricks, the gloss on the side edges cannot be returned back.

Difficulties in painting

The brick is made from natural materials. If he did not settle down, then there are certain difficulties. After all, the surface is porous and absorbs moisture. Therefore, painting old bricks or used bricks is much easier. Here the material is already settled.

Plane preparation quality

The durability of the coating will mainly depend on this parameter. There must be high-quality adhesion of surfaces and this needs to be worked on.

Types of dyes

This material is sufficient in retail chains. And what can be used to paint a brick must be decided depending on the environment. There are two options here, and we'll talk about them below.

Attention: Fresh brick does not paint better. It is better to do this when the material has been leached out.

Then you will spend less dye and it will not be such a time-consuming job. So before you do the masonry, think about whether it might be better to make it with a facing material or apply plaster.

Varieties of coatings

Facade paint for bricks is based on water or organic compounds. Each variety has its own characteristics, positive and negative sides.

It is important for the buyer to decide which properties to prioritize

Organosoluble nitroenamels and oil dyes

Possess
with the following characteristics:

1. Good
   penetration into the brick structure.
2. Sustainability
   to UV rays.
3. Creation
   on the surface of a thin water-repellent film that interferes with the original
   material to "breathe". Because of this, condensation appears on the surface in large
   quantities.

It is recommended to refuse organic paint for the facade for those who equip the interior of living quarters. Otherwise, the walls will get damp too quickly, the microclimate inside is disturbed. Exterior facades, fences and brick walls are optimal for paints. The composition of the material is toxic. At the same time, it is protected from burnout, precipitation in the atmosphere.

Water soluble

For painting walls
- one of the most durable paints. Suitable even for gas heating
traction, stove heating pipes. Sometimes finishing work is carried out with this material.
inside the house. Compatible with different types of materials:

• Gypsum
  tiles with imitation brick.
• Gypsum,
  silicate brick.
• Simple
  bricks.

Water soluble paints are vapor permeable. The exchange of gases and liquids proceeds normally between the atmosphere and the surface. Fireproof, non-toxic material. It is allowed to use it to decorate the interior of the premises. Some varieties have heat-resistant qualities when painted.

Epoxy

Customers can
give the compositions different properties according to their desires. Resins are toxic,
or non-toxic composition. Adhesion properties and high strength always
typical for paints. Precipitation can cause some
harm. Painting the walls from the inside with such a composition will guarantee durability,
high quality coating. Can be used inside covered balconies.

Mineral

The basis for making the material in this case is ordinary cement. This paint is suitable for painting facades from both a practical and a decorative point of view. Balconies and fences can be painted with paint. It differs in the following characteristics when the sand-lime brick is painted with facade paints:

1. Water resistance.
2. Heat resistance.
3. High
   temperatures, precipitation in large quantities do not cause serious damage.

Fence or facade
buildings will be reliably protected from further destruction. Option is rarely possible
see when they decorate the premises inside.

Silicone

Mixtures with
silicone - the choice for buyers if the base has low properties
regarding adhesion. Such materials are well distributed over the processed
surfaces. For a long time, they are capable of not changing colors. Stoves, fireplaces
decorate with heat-resistant varieties.

Types

The main types of paint and varnish coatings for bricks are acrylic, silicone, silicate, enamel paints. They are glossy, semi-matte and matte. Each has its own reflective ability (complete absence in matte, the highest in glossy).

Acrylic coatings are highly resistant to temperature extremes, their life span is 8-11 years. Facade painted walls are not prone to cracks and wash well. The paint does not peel off when exposed to rain and sun. Acrylic resin is added as a component, so moisture is poorly absorbed.

In most cases it is not recommended to coat a newly erected façade. This rule does not apply to acrylic paints, since they contain a binder that stops alkaline corrosion present in a fresh solution. Therefore, within 30 days after the construction of the building, you can paint it in any color.

Silicone paints and varnishes are distinguished by their durability and drying speed (- 3 hours after painting). They are protected from mold and mildew by a siloxane (resin-based) solution in their composition. In regions with hot climates and high air temperatures, painted facades do not change their appearance when exposed to ultraviolet rays.

Dust contamination on covered buildings is very quickly removed naturally (rainfall). A painted house can last 18-20 years until the next renovation. Various tints are used to change the color of the paint. The main color is white. You can convert it to any.

Silicate paints are subject to changes in air temperature. They tolerate moisture well, have high vapor permeability and fire resistance. Apply in two steps. The first layer dries up in 24 hours. The second in 8-11 hours.

Enamel coatings are fire hazardous and toxic. They contain varnish. However, these paints are very moisture resistant, durable and corrosion resistant. Drying period is 6-20 hours.

A special mineral paint for brick was created on the basis of cement. It is intended for previously painted facades that are difficult to restore. The degree of water resistance and vapor permeability of such a paint and varnish material is very high.The color of a brick house will not change for 10 years after the walls are treated with such paint.

Oil paints are used much less often. Most often, they are used to paint Russian stoves installed in summer kitchens (temporary huts). It is very convenient to apply beautiful artistic ornaments and drawings using this paint and varnish material.

The best option for staining are multicolored latex acrylic paints (Belinka, Sicily, Acrylatil, Husky, Mikrel and others). Each of them has its own unique characteristics.

Sicily paint is a silicone-modified and alkali-resistant, self-cleaning material. Used for facades of houses located in dusty areas.

Painting technology

one year after masonry production

Painting the facade includes preparatory work, painting and protection from debris on the freshly painted surface and getting wet.

Outdoor work should be carried out in the warm season, prepare ladders, ladders or scaffolding, tools for applying a primer and paint composition - brushes, rollers or spray guns.

Preparatory work and cleaning

1. You must first inspect the wall for efflorescence and dirt. Wash the wall with a jet of water. If you have greasy stains, use detergents.
2. Repair defects in roofing and gutters.
3. Be sure to remove old paint with a solvent.
4. Seal chips and cracks with sealant or cement mortar. Subsequent work should be carried out only after the solution has dried.
5. Treat the surface with herbicides to kill moss, fungus and mold spores.
6. Apply 2-3 coats of primer. Brick is not the most convenient and color-sensitive material, therefore it is advisable to prime the surface to increase the adhesion of paint to the surface.
7. If you have a grinder, grind the surface.
8. Seal the contours of windows, doors and other elements around the perimeter with masking tape to avoid getting paint on them.

Which one to choose for painting a brick facade

Exterior walls are often finished with facing bricks. Such a brick does not need additional coating.
... But there are cases when it is necessary to paint the brickwork from silicate bricks.

For example, you want to update an old wall or highlight a masonry element. Silicate brick consists of quartz sand and lime, so you need to choose a coloring composition with a high resistance to alkali
... Its properties are similar to ceramic, i.e. clay, but less water resistant

Therefore, when choosing a paint composition, the main attention should be paid to moisture resistance.

Most often, acrylic paints are used for these purposes, which, in addition to high moisture resistance, have good vapor permeability, wear resistance and an affordable price. Silicate brick has a light surface, so it is possible use of almost any color in painting
... It should only be remembered that when repairing a painted surface, it is often impossible to change the color of the coating, because a darker color will show through a lighter paint.

Peculiarities

Today, there are a number of materials on sale for outdoor finishing works.

Modern paints and varnishes have a number of the following properties:

• complete absence of chemically harmful substances in the composition;
• resistance to mechanical stress and sunlight);
• elasticity of the coating after staining;
• high moisture resistance;
• compatibility with other paints;
• wear resistance;
• very easy to clean from dirt;
• vapor permeability.

For painting both a new house and old buildings, paint on silicate bricks is suitable. It is applied easily, does not form drips, does not splash. At cost, it is much cheaper than other materials, more affordable for a wide range of consumers.

In general, by its characteristics, a brick is a material that is completely ready for long-term use while maintaining its original appearance. However, the building will look familiar and uniform. Paints will give it a completely new, sometimes fabulous appearance.

The main types of paint and varnish coatings for bricks are acrylic, silicone, silicate, enamel paints. They are glossy, semi-matte and matte. Each has its own reflective ability (complete absence in matte, the highest in glossy).

Acrylic coatings are highly resistant to temperature extremes, their life span is 8-11 years. Facade painted walls are not prone to cracks and wash well. The paint does not peel off when exposed to rain and sun. Acrylic resin is added as a component, so moisture is poorly absorbed.

In most cases it is not recommended to coat a newly erected façade. This rule does not apply to acrylic paints, since they contain a binder that stops alkaline corrosion present in a fresh solution. Therefore, within 30 days after the construction of the building, you can paint it in any color.

Silicone paints and varnishes are distinguished by their durability and drying speed (- 3 hours after painting). They are protected from mold and mildew by a siloxane (resin-based) solution in their composition. In regions with hot climates and high air temperatures, painted facades do not change their appearance when exposed to ultraviolet rays.

Dust contamination on covered buildings is very quickly removed naturally (rainfall). A painted house can last 18-20 years until the next renovation. Various tints are used to change the color of the paint. The main color is white. You can convert it to any.

Silicate paints are subject to changes in air temperature. They tolerate moisture well, have high vapor permeability and fire resistance. Apply in two steps. The first layer dries up in 24 hours. The second in 8-11 hours.

Enamel coatings are fire hazardous and toxic. They contain varnish. However, these paints are very moisture resistant, durable and corrosion resistant. Drying period is 6-20 hours.

A special mineral paint for brick was created on the basis of cement. It is intended for previously painted facades that are difficult to restore. The degree of water resistance and vapor permeability of such a paint and varnish material is very high. The color of a brick house will not change for 10 years after the walls are treated with such paint.

Oil paints are used much less often. Most often, they are used to paint Russian stoves installed in summer kitchens (temporary huts). It is very convenient to apply beautiful artistic ornaments and drawings using this paint and varnish material.

The best option for staining are multicolored latex acrylic paints (Belinka, Sicily, Acrylatil, Husky, Mikrel and others). Each of them has its own unique characteristics.

Sicily paint is a silicone-modified and alkali-resistant, self-cleaning material. Used for facades of houses located in dusty areas.

How is the facade painting done?

Important! If a brick house has just been built, you need to wait at least 1 year before painting its facade. This is due to shrinkage that occurs during the annual cycle under the influence of different weather conditions.

Before starting to work with paint, it is necessary to cover up all the cracks and holes in the wall with a cement solution, small cracks are repaired with plaster. Then you should carry out the so-called cleaning of the facade from pollution, especially if the house is not a new building, but has been serving its owners for many years. The walls are cleaned from numerous layers of dust and soot, and if necessary, from old paint.Cleaning is carried out using a "rough" method using a hard spatula or iron brush. In this way, cement cones and salt build-ups are removed from the wall. At the end of the rough cleaning, all walls of the house should be rinsed with clean water from a hose. Residual dust and dirt are finally swept away from the walls with a regular brush.

Wet walls after watering with a hose are treated with a special facade cleaner and after 5 minutes the full cleaning cycle is repeated. After that, you need to prime the entire facade, which will be painted.

Also, during the preparation of a brick wall for painting, a number of mandatory works are performed to remove excess moisture and eliminate leaks. Moss is removed from the walls, if any, and the moistened surface must be treated with a herbicide, after which it is washed. If there is mold, the walls are treated with a solution of bleach with water.

This completes the preparatory stage and begins the actual painting of the facade.

Experts and those who have already encountered painting the facade of a house at least once claim that an ordinary paint brush is the best tool in this matter. Painting the facade with a brush will paint over all the seams.

To prevent paint for the facade from getting where it should not (for example, on a window frame), jambs in doorways and other elements should be glued with tape or masking tape before painting. When painting, it is recommended to lay a film, cloth or old newspaper on the floor. This will protect the floor from dripping paint.

The wall is painted in 2 layers. After applying the first coat, wait for the time indicated on the paint package.

Painting the facade of a brick house should be done in dry, warm and not too sunny weather. It is advisable to calculate the time so that the favorable weather for work does not change for the next 2-3 days.

How to properly paint a brick?

Coloring is carried out
any convenient tools, including rollers, brushes, spray guns. Algorithm
wall processing is simple, includes the following steps:

• Preparation
  containers containing paints and varnishes.
• Tool
  plunges into the composition.
• Tool
  get rid of excess paint with a side at the bath.
• Apply
  composition on the wall, keeping one direction.

At every
the subsequent passage along the walls, the overlap increases when paint is applied.
This will make it easier to avoid streaks where there is no material at all.

Application
the second layer assumes work in several directions at once. Then the layer
turns out to be holistic, homogeneous. The work is made easier thanks to pneumatics, or
electronics.

How to choose the right paint?

Brick painting is a responsible business, and the choice of paint should be no less scrupulous. A covering for a stone and brick facade is chosen according to several criteria:

Binders

The main varieties of paints have already been described above in terms of their composition, and it is worth starting from this classification when choosing a material for a binder. However, sometimes other binders in the composition, such as cement or lime, are indicated on the packages. But the composition of the binder is not as important as its quantity.

Water permeability

Since painting bricks is not only aesthetic, but also preventive against premature destruction, the level of water permeability of a certain type of material should be at a height. Of course, more often than not many consumers are attracted by the low price, and they do not pay attention to the quality of the material. Price matters! High water permeability will promote cracking, flaking and salt deposits on the wall. In addition, the development of fungus and mold is inevitable, which not only spoils the structure of a brick or stone house, but also affects the health of others.

Sun resistance

Painting a brick wall performs one of the functions of protecting the facade from the effects of solar radiation. Excessive solar radiation contributes to paint fading, cracking and blistering.

The ability to pass steam

Allows you to remove excess moisture from fumes to the outside. Facade paints for bricks, as mentioned above, also have protective functions. One of them is to prevent the formation of mold and mildew, not only from the outside of the house, but also from the inside. When the material allows excess moisture to escape to the outside, mildew and mildew will have nothing to form on.

Wear resistant

The paint undergoes the greatest abrasion when washing the facade and in places where a person comes into contact with it the most times (for example, near doorways). Packaging with paint usually indicates the number of dry and wet washes that it will withstand until it is completely abraded.

Consumption level

There are facade paints for brick, the price of which is quite low, and the quality meets all needs. However, not everything is so smooth: before choosing a can in your hands, you should first carefully study its consumption per 1 m².

The time it takes for the paint to dry completely

House painting is usually done in 2 stages, in 2 layers. On packaging with facade paint, usually 2 time parameters are indicated. The first time indicates how long to wait after applying the bottom coat before covering the second one, and the next number indicates how long it takes before both layers are completely dry.

Comparison of facade paint with added silicone with facade paint without silicone addition.

Dyeing

Painting a silicate brick facade itself is a lengthy, but completely uncomplicated procedure.

You need to choose a paint that meets all the requirements
, the main of which is vapor permeability. After painting, the house should become saturated, not having lost the ability to "breathe". Material consumption is also an important point. The more paint is used up, the denser layer it will lie, hide all the irregularities and imperfections on the wall. Do not forget about the color after drying. As a rule, the surface of the walls will be slightly darker than the color of the original dye used to paint them.

Before starting the work itself, it is imperative to cover parts of the house with polyethylene, which do not need to be painted. These are entrance doors, windows, basement. You will also need scaffolding or high stairs, scaffolding.

Brick facades tolerate aggressive external factors well. But rains, frosts, winds and bright sunlight can have their destructive effect.

Brickwork can undergo mechanical damage, the invasion of fungi and mold, sometimes whitish spots - efflorescences are formed on the surface of the brickwork due to improper technology of production and laying of bricks.

To update the appearance, add decorative effect and additional protection, brick facade paints are used.

Due to the large amount of work, painting of facades is a laborious and expensive process. The durability of the paint directly depends on major
properties of paint for facades.

Among them:

• waterproofness
  - the ability to retain moisture on the surface, preventing it from penetrating deep into the material. If the coating allows water to pass through, when the temperature drops, the formed ice crystals will destroy the surface of the material. The surface will crack and the paint will peel off.
• resistance to sunlight
  - the property to preserve the brightness of the color when exposed to ultraviolet radiation. Facades on the south side are more exposed to excessive solar radiation and can change color over time - burn out.
• vapor permeability
  - the possibility of moisture exchange between the wall material and the environment. With low vapor permeability, the wall surface will be constantly wet, fungi and mold will appear.
• wear resistance
  - the ability to maintain protective and decorative properties for a long time. The average durability of the paint is about 5 years, compositions based on acrylic and alkyd resins can be used for more than 10 years without changing their properties.
• elasticity
  - an important characteristic that is necessary to compensate for temperature changes with the change of seasons to avoid cracking of the coating.
• heat resistance
  - resistance to low temperatures, sometimes achieved by using special additives.
• alkali resistance
  - clay for making bricks and cement-sand mortars for masonry have an alkaline reaction, which is unfavorable for the paint composition. Alkali eats away at the paint, it can begin to bubble and lag behind the wall.
• decorative properties
  - the possibility of tinting and creating surfaces of different reflectivity - matte, semi-matt or glossy. These qualities are necessary to give a building an elegant look, to accentuate architectural details and elements.

When carrying out painting works, important factors are technological characteristics
:

drying rate
- the ability to dry quickly on the painted surface, which is important for outdoor work, because The surface that has not yet hardened can be damaged by precipitation, depending on the ambient temperature.

degree of adhesion
- adhesion to the surface of the material, important when painting without priming

The more adhesion, the stronger the paint will hold, which will affect its durability.

consumption per sq.m.
- is necessary for preliminary calculation of the need for paint, and also allows you to evaluate the economy of one type of paint over another.

hiding power
- the ability to paint over the previous or main surface color well.