Water-based paint is mainly used for painting floors, ceilings and walls indoors. Although, there are certain types of this paint and varnish material intended for painting the facade. Today this paint is considered one of the most popular and demanded. Therefore, many are interested in the consumption of water-based paint per 1m2. It is indicated by the manufacturer on the label and serves to calculate the total amount of paint and varnish material that will be useful to you for work.
To save your budget from unnecessary waste, you need to calculate how much paint is required for a particular area. Calculation of consumption when painting a room
To do this, you just need to measure the length and width of the surface and calculate its area using these indicators. Moreover, if there are any unpainted areas, then they should be subtracted from the total area. This will give us the net surface area to paint. Next, we multiply the result by the estimated consumption per 1 m2.
Consumption when painting the ceiling
Today there are three types of water-based paints on the market - for walls, ceilings, as well as universal products. Therefore, a special composition should be used to paint the ceiling.
Ceiling paint is less durable than wall paint. Consumption of paint and varnish composition for painting the ceiling is within 1 liter per 10 m2. In some cases, the amount of consumable stain for the ceiling can be reduced and with one liter you can paint up to 15 m2 of the surface.
Consumption for wall covering
The calculation of the amount of funds for the walls is made in the same way as for any other surface. Here the consumption is approximately 1 liter per 10 m2 of wall surface. To minimize the amount of dye, it is best to apply it over an acrylic primer.
A high-quality roller plays an important role in painting, with it you can greatly save the amount of paint used What determines the amount of coloring agent
The amount of paint and varnish spent on painting depends largely on what surface you are going to process. For example, applying the composition to a material with high porosity or roughness will consume more paint than expected. This is observed when working with untreated wood or concrete. But applying paint to well-primed or already painted surfaces will be less costly. This must be taken into account when determining the total amount of paint. At the same time, it is recommended to apply at least one layer of primer in order to reduce the consumption of the water emulsion. It is best to use an acrylic primer.
If you need to decorate an old surface that was previously whitewashed, then the consumption of the water-based composition will depend on the level of contamination. That is, the more contamination, the more layers of paint you will need to use to obtain a quality finish. As a rule, in most cases it is sufficient to apply two coats. All this will lead to an increase in consumption by half.
In general, if the whitewash layer is too dirty, then it is better to remove it, which will reduce the consumption of paint and varnish material.
In addition to porosity and surface roughness, the type of tool that you will use for work affects the consumption. The greatest amount of ink is consumed when using foam rollers or long-haired rollers. Therefore, it is advisable to use an instrument covered with a woolen cover with medium-sized fibers.
It is recommended to purchase a higher quality paint, its consumption will be less Also, the amount of paint consumed will depend on its quality. That is, if you buy an expensive paint, then you can limit yourself to two layers of paint. When buying a cheaper product, you may need to apply at least three coats.
The main factors that affect the consumption of water emulsion:
- type of surface to be painted;
- the right choice of tool;
- quality of paint and varnish material.
How to reduce consumption?
The use of a sprayer will allow you to minimize the consumption of a water-based coloring agent. In addition, the skill of the master who performs the work plays an important role. Correctly and accurately performing staining, you will minimize paint consumption as much as possible. Accordingly, it is important to know the most economical paint application methods.
Technique for the economical application of water-based paint
For an economical ceiling painting, it is recommended to start by drawing a wide strip around the entire perimeter using a regular paintbrush. You also need to start decorating the walls with two stripes from the bottom and from the top. Strokes should be made in the direction of the rays of light, namely from the window. After you have dipped the roller in the coloring agent, it must be carefully rolled out on a piece of cardboard to distribute the coloring evenly over the cover.
The second coat of paint is applied perpendicular to the first coat. The product should be rubbed evenly over the surface to get the best result and not to overcoat. Better to make two thin layers, which will be much more economical and neat. When using an imported product, two layers are usually sufficient.
The second layer is applied only after the previous one has completely dried. This condition must be observed in any situation, since otherwise your surface will not look very smooth and of high quality. As a rule, it takes no more than two hours to dry one layer of water-based paint.
Also, do not forget about the correct preparation of the surface, which will help to avoid overspending of the coloring agent. First, level the walls and ceiling with plaster or putty. If the surface to be painted was previously painted, you need to clean it from the previous layer of dye.
It is important that the coating remains dry prior to painting. The actual application of paint should be carried out at a temperature of at least 5 degrees. Before starting work, you should carefully read the instructions.
For example, some manufacturers of water-based dye offer an additional 10% dilution. In any case, you should carefully move the product in an open jar and only then start work. In any case, it is better to take the product with a small margin so that you do not have to buy it later.
Thus, the consumption of water emulsion depends on many factors. To save paint, it is important to know how to apply it correctly and prepare the surface. Therefore, what expense will be in your case depends only on you.
01.10.2015
Oct 01, 2015Before purchasing paints and varnishes, it is reasonable to calculate the required volume. Many people believe that you can just focus on these labels. However, the consumption rate may depend not only on the type of enamel and its hiding power - oil, water-based, acrylic or alkyd enamel - but also on the base material. Let's look at how to correctly calculate the volume.
First, let's talk about the general principles of calculation, and then go through the types of coatings and surfaces.
Determine the coverage area
From the school mathematics course, everyone remembers that to determine the surface area, you need to multiply its length by width. For example, the length of the wall is 5 m, the height is 3 m. The area of the wall is 15 sq. M.
Similar calculations need to be made for all rooms and surfaces that you are going to paint - walls, ceilings, floors. For paints of different colors, the calculation, of course, must be done separately. For example, you can add up the areas of all ceilings that will be painted white and separately the areas of the walls that will be painted beige.
When implementing design ideas (a combination of a painted surface with wallpaper, etc.), the calculation becomes more complicated, but the principle remains the same - we calculate the area of only the surface to be painted.
We calculate the consumption of paint
Having received information about the working area, we look at the label. Branded products usually have hiding power and dry residue values indicated. Hiding power is the ability of a material to overlap the color of the substrate when applied uniformly in one coat. Dry residue - those substances that will remain on the working surface after the enamel has dried. Usually it allows you to estimate the content of water and solvents in the composition of paintwork materials ().
We calculate the approximate volume using the following formula:
(Opacity / Solids) * 100
If you need to paint a wall with an area of 15 square meters, then with a covering rate of the material 120g / m2 and a dry residue of 60%, the paint consumption per square meter will be equal to:
(120/60) * 100 = 200 g / m2
We get the total consumption: 200 * 15 = 3 kg.
It is also necessary to take into account the density of the composition. For example, the density of the coating is 1.4 g / cm 3. To calculate the paint consumption per square meter, divide the mass (3 kg) by the density (1.4 g / cm 3) and get 2.1 liters. This means that you will need 2 cans of paintwork materials, 1 liter each.
Depending on the type of base surface and the properties of the particular coating, this figure can be +/- 20%. For example, to paint a concrete wall, as well as a brick or plastered wall, you will need 10-15% more paint than for wood or metal surfaces. To reduce the consumption of material, the walls can be pre-treated with a primer.
Consumption rates of oil paint per 1 m2
On average, 110-130 gr is required to paint the surface in one layer. coverage for 1 square meter.
However, the consumption of oil paint on wood and metal, as well as other surfaces, can vary significantly. However, differences can be significant for different application methods and in different climates.
For example, during outdoor work, the consumption of oil paint will be lower in dry weather (than during indoor work) and higher in rain and strong winds. In the latter case, the consumption of oil paint per square meter can be twice as high as in the production of interior work.
Second point. Since wood absorbs more metal, the consumption of oil paint on wood will be higher than on metal. The difference can be up to 2 times.
In addition, the required amount of coverage depends on its color. So, dark
enamel (black, brown, blue, green) you need 1 m 2 more than light (white, yellow, blue). In this case, the consumption of oil paint per 1 m 2 for non-ferrous metal will be higher than for galvanized iron or ferrous metal.
Finally, the brush always takes up more material, whether the bristle is natural or artificial. When using a roller, the consumption of oil paint is 1 m 2 less. The silicone roller is ideal for painting metal surfaces.
Consumption rate of water-based paint per 1 m 2
The average value per square meter is 140-160 g. This applies to one layer. With a high hiding power, it is enough to apply 2 coats. Lower quality paints may require 3 or more coats. So before you buy cheap enamel, you should think about it - you will spend more of it, and the labor costs will be more significant. So is your savings worth it.
The consumption of the facade for 1 m 2 is usually higher than when painting walls and ceilings indoors. Since this type of coating contains water, outside, especially in the wind, it evaporates faster than inside, and as a result of uneven drying, additional layers have to be applied.
The consumption of water-based paint for wallpaper will also be higher, since the paper has good absorbent properties.
The required volume may vary depending on the type of water-based paint. Check out the table. It provides an approximate amount.
Acrylic paint consumption rate
Average consumption of acrylic paint for interior work (painting ceilings and walls) - 130-200 g / m 2. Painting the facade, especially in wet windy weather, may require more material. On plastered walls, brick and concrete, the consumption of acrylic paint per m2 is higher than on wood or metal.
Alkyd paint consumption rate
The average is 150 g / m 2. One liter is usually enough for 10 square meters. However, these indicators may vary depending on what and in what proportions you dilute the composition - linseed oil, kerosene or turpentine. Also, the consumption of alkyd enamel per 1m 2 depends largely on the structure and porosity of the base surface. So, the consumption of alkyd paint for metal will be less than for wood or concrete.
The main thing to remember is that it is better to calculate everything in advance, than then run around in search of the desired shade or lament the overpayment for extra material.
During the renovation, an important issue is the paint consumption per 1 m2. In order not to buy extra paint or, conversely, not to run to the store, if suddenly there was not enough to paint, we will consider in this article how much dye is spent on a given area.
So, the most common for painting walls, ceilings or floors of any room is dye... This is an environmentally friendly material that does not have a specific smell, is safe to apply and is quite durable. In addition, water-based paint does not require any special skills, the main thing is to observe the technology when preparing it immediately before work. The paint adheres well to any surface except glossy.
The manufacturer's declared consumption rate of water-based paints is 1 kg per 7-10 sq. M.
To reduce material consumption it is necessary before application treat walls or reinforcing mortar... Do not paint with a thick layer, dilute the water-based paint with water, add PVA glue. When the first coat has been applied, you should wait an hour and a half before proceeding with the secondary painting.
The first layer of paint will take more (about 1 liter per 4-5 sq.m.) than when applying the second one (1 liter per 6-9 sq.m.). The consumption of water-based paint largely depends on the hiding power of the product. With a good shading setting, two coats will suffice.
Do not forget about the temperature and humidity of the room.
The room should be dry and warm within 25 degrees.
For work with painting walls or using brushes of various widths, rollers and special sprayers are also well and quickly painted. Depending on the tool you choose, paint consumption will vary. The roller distributes the color evenly over the wall surface, leaving no streaks or unevenness, while working with a brush requires some skill.
The material for the roller can be of several types: made of foam rubber, porous foam, fur, rubber, terry cloth. For work with water-based paint, it is advised to use a long-naped coat for the roller. This material absorbs more paint and, with even pressure on the roller, gradually transfers it to the surface. Also, for convenience, it is advised to use a special bath where you can wet it, then squeeze out excess liquid so that it does not drip onto the floor during operation. If a color scheme is used, it is imperative to thoroughly stir the paint so that during the work the color of the walls does not change its shade.
Oil paint consumption
Oil paints are also widely used for interior and exterior painting. They include, it serves as a binder. It is used more often in places where moisture protection is required. Oil paint has a pleasant gloss and is also resistant to abrasion, therefore the walls painted with it can be washed with water.
Consumption of oil paint per 1 square meter depends on the color and surface on which it is applied: 1 liter of the most common enamel PF-115 is enough for 7-10 square meters of white; red or yellow - 5-10 sq m; blue - 12-17 sq.m; black 17-20 sq. m.
Almost any surface can be painted with oil paint: wood, concrete and even metal surfaces. Material consumption when painting metal will be minimal, since its surface is very smooth.
When painting, the consumption of oil paint per 1 square meter of the wall is 100-200 gr.
Acrylic based water-borne paints such as Betek plus consumed up to 8 square meters per liter of paint. VD paint has a rich palette of matte colors, does not fade in the sun and is resistant to water. Acrylic-based paints are applied in several layers, please note that the tool you use and the material to which the paint is applied can absorb more product. Therefore, if you use a brush, but, for example, from, then 10-15% should be added to the calculated amount of paint.
Water-based paints are used very often, since they are relatively inexpensive, environmentally and sanitary safe, and do not give strong unpleasant odors. They also have a number of other advantages, but even such a perfect and convenient building material costs money. It is necessary to carefully calculate the real need for it, so as not to overpay and not to buy it additionally during the repair process.
Peculiarities
The tonality of the water-based paint changes quite flexibly, you just need to add color to it. Special additives prevent peeling, cracking and burnout, the applied layer dries very quickly. Emulsion dye easily and comfortably fits on a variety of surfaces, even on wallpaper, it is used to paint walls and ceilings.
This kind of coating is necessary for both outdoor and indoor work. The paint is formed by combining water with specially selected pigments. When the water evaporates, only substances "responsible" for the color will remain on the surface. Ease of use, solid protective characteristics, excellent resistance to moisture and ultraviolet radiation - all this testifies in favor of water-based paint. Therefore, it is very important to calculate its quantity, to accurately take into account all circumstances and factors.
Of great importance in calculating the real need for paint is the condition of the substrate (the previous layer). Any manufacturer always writes on the label and on the packaging how much of the dye composition needs to be consumed to close 1 sq. m of surface. But all these figures refer only to ideal conditions, and with ordinary repairs in an apartment or house, it is rarely possible to achieve the ideal.
Calculation technology
The consumption of a water emulsion per 1 m2 is also determined by the hiding power of the paint: if this parameter is high, it is sometimes possible to completely cover the darker base with a couple of layers. But there are times when you have to paint three times or even more. When applying the first layer, 1 kg of paint can cover 4-5 m2, and when you paint for the second time, the same amount will be able to paint from 6 to 9 sq. m. Remember that rollers with a long pile (as well as any length of pile made of foam rubber) slightly increase the cost of the dye mixture.
If you turn to the tables showing the consumption of water-based paints of various compositions on thoroughly prepared surfaces, you get the following picture (consumption by layers per 1 square meter):
- Silicate varieties - 400 and 350 g.
- Polyvinyl acetate - 550 and 350 g.
- Silicone - 300 and 150 g.
- Acrylic - 250 and 150 g.
- Latex - 600 and 400 g.
But it should be remembered that each manufacturer has its own recipe, technology, the range of tolerances is also different. And although acrylic paint for interior work is unlikely to be more expensive than latex or polyvinyl acetate, a difference of 10-15% compared to the table values is quite likely.
Helpful hints:
- The hiding power of water-based paints is closely related to the indoor microclimate. The best conditions are air warming up from 25 to 50 degrees, dryness in the room, relative humidity of the air maximum 80%. Pay attention to the porosity of the surface to be painted: the higher it is, the more paints will have to be used. It is advisable to use a spray gun whenever possible, it allows you to reduce the consumption of the paint mixture by 10% in comparison with a brush or rollers.
Consumption of water-based paint per 1 m2
How to find out the consumption of water-based paint per 1 m2? How much composition is required for interior work with a wooden surface? How can I reduce the amount of paint needed? Helpful hints.
Water-based paints are microscopic particles of polymers that are not dissolved, suspended in an aqueous medium. Depending on the polymer base, there are acrylic, silicate, latex, polyvinyl acetate and silicone water-based paints.
The paint is fire resistant and does not harm health because water is used as a solvent for it.
What determines the consumption of water-based paint?
These paints are used for both indoor and outdoor use, they suitable for coloring: concrete, brick, plaster, paintable wallpaper. Each surface will have its own consumption.
To paint textured plaster material you will need 10-20% more than for smooth. This is due to the fact that painting over the protruding elements will require additional material consumption.
An important role in reducing paint consumption is played by surface preparation to painting. If the surface is putty and sanded, a reinforcing primer is applied, the material consumption will be significantly reduced.
For applying water-based emulsion it is not recommended to use brushes, in this case, the consumption of paint per square meter will be maximum. The ideal tool would be a spray gun, here you can achieve optimal flow by adjusting the pressure and shape of the torch.
A roller and tray are often used. For painting rough surfaces and stucco, it is best to use roller with fur coat made of long-haired materials. For smooth surfaces, a short-haired fiber coat is suitable.
When working with a roller, it is important to use correct painting technique:
- The tray must be sized so that the roller fits freely in it.
- The level of ink in the tray should be such that the roller does not submerge more than a quarter.
- When applying the coating, the roller must be pressed with the same force over the entire surface, then you get an even coating without streaks and stripes.
- If the paint is thick, you can add water, but not more than 10%.
- You need to try to rub the paint, not to dip the roller often, then you get a thin, smooth layer.
- No need to apply a thick layer of paint, hoping to get an opaque coating in one go. This can lead not only to overspending of the finishing material, but also to cracking of the coating.
- It is necessary to finish the surface in thin layers with intermediate drying for at least 2 hours. With good surface preparation, 2 coats are usually sufficient.
You may be interested in learning about the plaster consumption rates. Read here.
Consumption rates
The manufacturer always indicates the rate of paint consumption per 1m2. Should be considered, that this norm is approximate.
The consumption is calculated to cover the ideal surface under ideal conditions by qualified painters.
Water-based paint: consumption rates per 1 m2
Consumption rates of water-based paint for various surfaces in 1 and 2 layers of painting. What affects paint consumption?
The consumption rates of any water-based paint per 1 m2 should be known to everyone who is going to use this composition for decorating various surfaces. This will help to correctly calculate the required amount of material and avoid unnecessary financial costs. It is a mistake to think that everything can be prepared "by eye". This leads to the fact that the quality of work decreases, and the time spent affects the overall mood.
Various types of material and their consumption
Before you go to the hardware store, you need to decide what type of material will be used. After all, the specific properties of water-based paint and its consumption largely depend on the composition.
Consumption of different types of water-based paint
Acrylic resin emulsion
Currently, this particular variety is considered the most popular. As the name suggests, the main ingredient is acrylic resin. Additionally, various additives are added, which are responsible for the acquisition of the desired properties by the composition.
The resulting coating has excellent performance, is not afraid of mechanical stress and moisture. Therefore, it is an excellent way to process the facade of a building.
Acrylic emulsion has a standard consumption per 1 square meter: when applying the first layer - from 180 to 250 g, the second layer will require 150 g. It depends on the base material and application technology.
Silicone based emulsion
The main component of this paint is silicone. The peculiarity of this variety is that a surface is created that has excellent vapor permeability.
This paint can be used for application to the floor, it does not allow the formation of mold and mildew. It is also an excellent solution for walls with numerous cracks, no more than two millimeters in size. Unlike the previous type, this is a good option for interior work.
The first layer of silicone emulsion will require 300 grams per square meter. For 2 layers with the same parameters - only 150 g.
Emulsions with the addition of silicates
The composition of the material includes liquid glass. It is due to this that the surface is very resistant to various influences.
But even taking into account the long service life, which can be tens of years, the composition does not like high humidity. This limits the scope of its use.
When applying the first layer, you will need 400 g, the second - from 300 to 350 g per square meter of surface.
Mineral based solution
The composition of such a product contains slaked lime or cement. This material has proven itself to be extremely suitable for indoor work with concrete or brick surfaces.
The standard consumption rate of such a water-based paint per 1 m2 is 550 and 350 grams for the first and second layers, respectively.
There is also a polyvinyl acetate emulsion on the market that includes PVA glue. Such a composition is distinguished by its exceptional instability to any manifestations of moisture. For 1 square meter, it will take almost the same amount as a mixture based on minerals.
On a note! Currently, there are spray cans of paints. They differ in that it is quite difficult to predict their consumption, even taking into account the norms specified by the manufacturer. In addition, such formulations have a pungent chemical odor.
Dependence of paint consumption on other factors
All stated application rates are to be regarded as standard. Under certain circumstances, these figures may change. Therefore, you need to work with water emulsion carefully, taking into account various factors.
Much depends on the hiding power that each type of paint possesses. This feature affects how many layers you need to make. Options are considered standard, applied in one or two layers. It happens that the work may take more time, but each subsequent layer will require less consumption. This largely depends on the surface. Wood and drywall will require more paint than concrete and brick.
The consumption of water-based paint largely depends on the material of the painted surface.
The following parameters affect the consumption of water-based paint per 1 m2:
- The tool that is used for the job. The most economical is a simple brush. The roller has a higher consumption, but much depends on its attachment: a long pile increases the amount of required material by almost 2 times. It is possible to work with a spray gun quite quickly, but it can be very difficult to calculate the flow rate of the mixture, especially in the absence of experience.
- Ambient temperature. High rates lead to higher consumption, because there is a rapid evaporation of the water contained in the composition. Low temperatures have the same effect, because the solution simply cannot adhere to the base.
- Humidity. It is quite difficult to carry out work in dry rooms; more paint will be required. This is due to the fact that the surface absorbs a lot of water.
- The correctness of the preparatory procedures. The main thing is the application of putty, if the surface has significant drawbacks, and the obligatory priming (in several layers).
- Application technology. This indicator is paid the least attention, although it is no less important.
Consumption rates of water-based paint per 1 m2
To determine the consumption rate of water-based paint per 1 m2, various factors must be taken into account. Of course, a lot depends on the material used.
The calculation of paint for 1 m² can be done with some basic knowledge and motivation. Then you can independently calculate how much material is required to paint the facade on plaster, this will help save a decent amount of money.
It is very important that the coating protects the facade of the building from precipitation, extremely low temperatures, wind and scorching sun, as well as from the harmful effects of air and rainwater. Not only the appearance of a newly built or renovated house depends on the type of paint, its quality and tone. The characteristics of the coating determine the durability and how the house will look in 10 or even 20 years. Therefore, there is no frugality in buying a cheap paint and varnish material, paint consumption is not calculated at all in order to save money. It is better to afford to buy the best quality paint, in which case the facade will look new for a very long time.
By the type of approach to outdoor work, facade paints are divided into two groups.
- First group- organic paints that are never applied to fresh plaster. This group includes silicone compounds, acrylic paints and silicone-acrylic coatings.
- Second group- inorganic (mineral) paints, which can be used to cover fresh, still damp plaster after about a week. Inorganic formulations are less popular than organic ones. These are silicate paints, lime and cement coatings.
When choosing the type of paint for the facade, two main factors must be taken into account: the color range and the degree of air pollution. This will allow you to find exactly the product that is ideal for a particular building and will give it an attractive appearance.
The choice of paint is often dictated by the type of plaster. When restoring buildings, the most commonly used are: lime, cement or cement-lime paints. In modern construction, as a rule, thin-layer plasters, silicone, acrylic-based compounds and silicate minerals are used, which are components of a well-thought-out insulation system for a house built using modern technologies. The easiest way to apply a simple principle when buying paint is that it must be of the same type as the plaster.
Acrylic paints
Acrylic paint has very good adhesion to the substrate, elasticity, resistance to dirt and rinsing with water. It boasts a low permeability, it is suitable for restoring an old facade, it can also be painted on mineral substrates, placed on previously painted layers of cement and cement-lime plaster. It should not be used on surfaces of silicate and lime plasters.
Acrylic paint consumption - 110-135 g / m².
Silicone paints
Silicone paints and varnishes are a vapor-permeable product that is resistant to sun radiation, which allows the facade to breathe. It protects walls from water penetration from the outside, does not lend itself to chemical pollution, exhaust gas and acid rain. Silicone paints form a flexible and dirt-repellent film. They can be used on many surfaces, such as old paint-coated walls or the façades of historic buildings.
Paint consumption is about 200 g / m².
Silicone-based facade paints. Peculiarities
Cement paints
It is a mineral material that is sold as dry mixes. It is dissolved in water or in a liquid preparation, which is offered by the manufacturer. Cement paints are characterized by high vapor permeability and water absorption. They are easily contaminated and are therefore very rarely used in residential construction today.
There is a rule that the paint must be adapted to the type of plaster. Cement paint is used for painting cement-lime and cement plaster. And it is probably one of the cheapest. When it comes to color, she has limited choices.
Consumption - 500-700 g / m² (two-layer coating).
Polysilicate and silicate paints
Silicate paints are fairly resistant to moisture compared to lime paints, but have almost identical good vapor permeability. They are highly durable, resistant to mold and the harmful effects of atmospheric factors. Silicate paints are very resistant to dirt and the coating is not electrified. There is a fairly limited range of colors on sale.
Polysilicate paints are a modern innovative type of silicate paints formed by enriching them with various resins. These paints are much easier to apply. They have excellent water resistance, high vapor permeability and, unlike their predecessors, are compatible with organic plaster.
Consumption of polysilicate paint - 140-150 g / m².
Self-calculation
As a rule, manufacturers place a calculator on their websites that allows you to calculate how much paint you need to buy. But the calculation can be done independently.
If the manufacturer indicates the consumption of paint on the packaging, then the exact consumption per 1 m² is very easy to calculate. For example, if the consumption is 10 m² / l, this means that 100 ml of paint will be required to paint 1 m² of the wall.
To calculate how many liters (or kilograms) of material should be purchased to paint the whole house, you need to decide on the number of layers that will be applied. As a rule, the surface of the walls is covered with two layers of paint. Much less often it happens that only one layer is applied. Sometimes painting is done with more coats. If the walls are covered with a primer, the manufacturer may suggest that the consumer be limited to one layer. When calculating for porous or rough surfaces, approximately 20% is added to the consumption indicated by the manufacturer on the packaging. Complex moldings and fittings will require additional paint.
Then, in order to avoid unpleasant surprises during work, the result obtained should be increased by another 10% -20%.
To calculate the surface area of all walls, you need to measure the length of each wall, add all the lengths together, and multiply by the height of the house. But, of course, not everyone has a house that looks like a box of matches. In the figure, we can see that the red square has the same area as the blue triangle. This means that the surface area of a triangular wall is not so difficult to calculate. Of course, you need to remember to measure doors, windows and other areas that are not painted in order to subtract the resulting area from the square footage of the task (this is about 10% of the total surface area of the walls).
Prices for different types of building paints
Building paint
Additional factors affecting paint consumption
Manufacturer data
The vast majority of paints are offered by manufacturers in a ready-to-use form. Manufacturers write various data on the packages. In general, this information tells about the necessary precautions, about the benefits, purposes and conditions of use of the product. But a lot of this data affects material consumption. Ultimately, these descriptions will help you choose the most suitable product.
Regardless of the type of paint, the more binder, the higher the quality of the product.
Water absorption (absorption) coefficient
This factor should be as low as possible (about 0.05 kg / m²h0.5.). The lower it is, the more resistant the coating is to moisture, and the surface is less prone to contamination.
UV resistant
Excessive exposure to the sun's rays causes discoloration, cracks and blisters in the paintwork. The most resistant to UV radiation are polysilicate, acrylic and silicone-acrylic paints.
Vapor permeability
When a wall is designed so that each of its layers allows steam to pass through, this is considered a good property. Manufacturers usually indicate how many grams of water vapor penetrates the wall. The higher the indicator (more than 100 g / m²), the more breathable the paint is.
Abrasion resistance
It is given in wash cycles, dry or wet. The more cycles (approx. 5000), the better.
Drying time
The description on the label tells you when to apply another layer.
Attention! If the manufacturer gives two values for paint consumption, it should be taken into account that a small indicator is used to explain how much paint goes to a flat surface, and a large one to a surface with a pronounced texture.
Choice of tools
The paint can be applied by roller, brush and spray, the choice depends on the chemical composition of the coating and the surface to be decorated. It is worth adhering to all the manufacturer's recommendations as closely as possible.
Attention! The use of spraying can significantly reduce paint consumption, but it should be remembered that not all facade coatings are suitable for this method of applying them to the wall surface.
Smooth textured walls are easiest to paint with a brush or roller. The smoother the wall, the shorter the nap of the brush.
Attention! Paint consumption per 1 m² directly depends on compliance with the technology of work. When deciding to paint the walls yourself, you need to take into account that even the smallest nuances can affect the cost of paint and varnish material.
Facade painting instructions
The work must be carried out in good weather conditions specified by the manufacturer (on a sunny day, at an appropriate temperature, preferably in the range of 20-25 ° C, when there is no wind). Under these conditions, primers and paints form the most reliable protective dry film.
Step 1. Surface preparation
Prepare the surface before applying the paint. It is important to make sure that the surface of the wall is clean, free from dirt, peeling paint and cracks.
Prices for mixtures for leveling walls and ceilings
Mixes for leveling walls and ceilings
Step 2. Primer
It is necessary to use a special primer that matches the selected type of paint. The primer improves adhesion and absorbency, preventing the formation of stains caused by uneven paint absorption. Walls covered with a primer are easier to paint, this preliminary surface preparation will significantly reduce material consumption.
Step 3. Painting
If the primed wall is shiny, this means that it must first be painted with diluted paint in a 1: 1 ratio and only then applied at the concentration recommended by the manufacturer. The thicker the paint layer, the better the protection of the facade. Therefore, do not dilute all the finished paint - it is designed to provide the longest lasting protection. And, of course, you need to be careful when choosing a color. Some shades, such as deep blues and reds, will fade faster.
Prices for paint sprayers
Spray gun
Video - Painting plastered facades