How to calculate the correct consumption of primer per 1 m2 of wall?

Consumption

It is all these signs that determine how much primer consumption you spend per square meter of surface. This indicator, most often, is indicated on the packaging, because this is the most important characteristic that allows you to know how much material it costs to purchase, so as not to run after additional materials.

The consumption of a deep penetration primer depends on the following factors:

• the amount of primer used is influenced by the material of the surface on which the material will be applied (metal, wood, stone);
• the composition of the primer itself, namely its elements, their proportion, which is directly set by the manufacturer himself;
• the amount of material used is also influenced by the type of further dye, glue and building material;
• quite an important factor - the season, weather conditions.

All these factors in one way or another affect the future consumption of material. But there is still one parameter that affects the consumption rate - this is the method of applying the material, as well as the tools themselves that are used during work.

The tools with which you will apply the primer have a lot to do with how much you will spend on the selected area. The substance itself is sold in containers of different volumes, you select the one you need.

The primer can be applied to the vertical surface with special tools. A roller is a fairly convenient way to apply material to vertical walls.

Roller

The most common option for painting hard-to-reach areas is a brush. The brush is used when applying material on the seams, when processing corners and hard-to-reach places;

Brush

Also, when applying the primer, sprayers are used.

Spray

The primer is available in a liquid version, and has a transparent composition and can be used before gluing wallpaper, but if you are processing wood, then you should choose a moisture-proof material.

It contains darkish pigments, which makes it possible to clearly see the boundaries of application when applying it, but it should be understood that using this type of primer it is worth remembering one rule: in no case should the primer be darker than the topcoat.

If it is metal, then 80-100 g per square meter is enough for it. You should be aware that work on metal must use a primer without acrylic, this is due to the fact that rust is not observed on such a primer. But before applying the primer to the metal, it must be carefully prepared for use.

If, before applying the primer, the metal surface was used quite often, then fluffy rust clearly remained on it, then it can easily get rid of it using the necessary tools (brush).

This is necessary so that the old metal does not absorb the primer, which means that if you do not process the material in advance, you can spend twice as much paint and varnish materials during further processing. In order to treat a metal surface with a primer, it is worth choosing it based on resins.

It can be used for both metal and concrete. 80-100 g per square meter, is considered the smallest indicator among all available bases. The consumption rate of a deep penetration primer per 1m2 based on acrylic is 120-150 g per square meter.

Acrylic primer dissolves easily and easily in water; you can buy it in a store in the form of a powder, or in the form of a concentrated liquid.

In its structure, such a mixture will resemble a simple whitewash, therefore, it makes no sense to apply it on dark surfaces. This primer is good for painting with acrylic paints.Can be used both indoors and outdoors.

Using a primer, before applying the base material, not the surface - there is a place to be. If you neglect this advice, then we can assume that the money spent on finishing materials is wasted.

There are certain counting rules based on which you can determine how much primer you need to process a particular room. The first thing to do is to calculate the total area of ​​the room, but at the same time take into account its properties.

It should be understood that the walls, floor and even the ceiling have different density characteristics, therefore, it is worth calculating for each surface, separately. Several indicators of material consumption are indicated on the packaging of the primer.

Approximate values ​​of material consumption:

a primer based on acrylic can be consumed with an approximate value of 110-160 g / square meter;

Acrylic

the Knauf primer, which is used for walls, can be consumed from about 50 to 130 g / square meter;

Knauf

the approximate consumption of deep penetration primer (in general) is 100 g per square meter.

Acrylic primer NORTEX-PRIMER

Description

Acrylic primer NORTEX-PRIMER is an antiseptic deep-penetrating acrylic primer. Universal for wood, concrete, stone, brick, etc. For indoor and outdoor use. Strengthens the base, prevents the appearance of fungus, mold, blue.

Appointment

For the preparation of various types of surfaces before application with waterdispersion paints and varnishes... Primer Nortex-Primer glues and strengthens the base of the surface by filling the pores with small polymer particles. It reliably adheres to the paintwork, increasing its service life. The primer reduces the consumption of paint and varnish material.

Application area

It is used for the preparation of wooden, stone, brick, concrete, plastered and plaster surfaces. It is used in residential, industrial, administrative, general education, preschool and other types of buildings.

Ready to use. It is recommended to stir the primer before use. It is applied on a solid, dry, free from old peeling paint, whitewash, dust and grease surface. Oil and grease stains are removed with a solution of soap or soda ash, followed by rinsing with water and drying the surface. It is recommended to putty the surfaces before priming.

Apply by brush or spray gun. The number of layers applied depends on the surface to be primed.

Further work with the primed surface can be carried out after drying (1 hour at a temperature of (20 ± 2) ° С). At ambient temperatures below 15 ° C and / or humidity above 80%, the drying time may increase up to 24 hours.

It is tinted with pigment pastes intended for water-dispersion paints and varnishes.

Storage

It is stored in a tightly closed container away from heat sources at a temperature not lower than +5 ° С. It is transported by all types of transport in covered vehicles. Shelf life is 2 years.

Specifications

Application Tips

Before applying acrylic primer to the surface, the base must be prepared. The surface is cleaned from the layer of the old coating, washed from dirt and degreased.

The primer mixture is most often available in a ready-to-use form. If the mortar has a very thick consistency, then it can be diluted with water or solvent (depending on the composition of the primer). Detailed information on the preparation or the possibility of diluting the mixture will be indicated on the product packaging.

You can distribute the primer with a paint brush, spray gun or paint roller. It should be borne in mind that the flow rate of the mixture will depend on the selected tool. Working with a paint brush will provide the lowest consumption, which can be about ninety grams per 1 m2. When working with a roller, the cost of the primer will be approximately one hundred and ten grams per 1 m2. The greatest consumption will be when working with a spray gun or near the ground in aerosol cans.

Relief surfaces are best handled with a paint brush. On a flat surface of a large area, it will be easier to work with a roller. The consumption of the mixture when working with a spray gun can reach one hundred and fifty grams per 1 m2, but this method of application is characterized by the least effort and time costs.

Primer consumption per square meter

The greatest consumption of the primer is required when processing porous materials that can absorb the applied mixture. To create the primary layer, a deep penetration agent is used, which can ideally fill the voids, additionally strengthen the base. In this case, one square meter. meter of surface consumed about 100 g of dry mix. In the treatment of concrete walls, you can use the primer "Betonokontakt". This tool is spent within 350 ml per m2.

There are special mixtures designed to cover wood substrates. These funds penetrate between the fibers, subsequently preventing moisture from penetrating and provoking decay processes. Such mixtures are consumed within 120 ml / m2. After this treatment, the consumption of putty per 1m2 can be reduced.

Metal structures are also treated with a primer to prevent rust. When covering such surfaces, the consumption of primer per square meter is calculated at the rate of 80-120 ml.

Primer consumption rate per 1m2 for various finishing mixtures

Let us consider in detail in what quantities the primer composition of various types is consumed per square of the treated area:

• the consumption of concrete contact primer per 1 m2 reaches 0.4 kg;
• deeply penetrating soil is consumed in an amount of up to 0.16 kg;
• consumption of alkyd compositions does not exceed 0.15 kg;
• water-dispersive primer is applied before painting in an amount of up to 0.1 kg;
• for decorative plaster, the consumption of special soil is 0.2 kg;
• the consumption indicator for acrylic-based soil is 0.12-0.14 kg;
• anti-corrosion primer for metal protection is consumed in a volume of up to 0.08 kg.

Special moisture-proof soils are also used, applied in an amount of up to 0.1 kg per square meter of surface. The primer, applied by roller or spray, contacts the substrate immediately, forming a strong layer. With increased hygroscopicity of the surface, the treatment is carried out in two steps, which, accordingly, affects the consumption of the primer liquid.

Make small adjustments to the calculated value of the structure and surface features

Deep penetration primer - consumption per 1m2 of surface

The use of a penetrating primer can significantly reduce the amount of glue, plaster and paint intended for application on a porous substrate.The deeply penetrating primer has increased adhesion properties, due to which reliable contact with the wall or ceiling surface is achieved. The penetrating composition is used to treat surfaces characterized by increased hygroscopicity.

It provides protection:

• wood;
• concrete walls;
• brickwork;
• aerated concrete blocks;
• particle boards;
• wood fiber panels;
• foam concrete base;
• cinder block walls;
• gas silicate surface.

The use of a penetrating primer can significantly reduce the amount of glue, plaster and paint

The adhesion effect of the penetrating primer is best manifested on surfaces with a fibrous or cellular structure. Consumption of deep penetration primer per 1m2 is regulated by the manufacturer and is indicated on the packaging. With increased soil absorption by the base, the material consumption reaches 0.18 kg per unit area when processing in one layer.

Calculation of the primer per 1m2 - the consumption of acrylic compounds

Primer composition acrylic based popular among master finishers. The primer is offered in an extended range of hardware stores. It is used for interior work, as well as for finishing the facade walls of buildings to be plastered.

The material is sold in sealed packaging and has a different consistency:

• powdery. To prepare acrylic primer, the powder should be diluted with a certain volume of water, the amount of which is indicated on the package;
• liquid. It is more convenient to use a water-dispersed soil, since it is ready for use and there is no need to dilute the powder with water.

Acrylic based primer is used to prepare ceiling and wall surfaces for puttying, wallpapering or plastering. The primer is also used to improve the contact of acrylic paints with the surface. The consumption of the primer per square of area is 0.13-0.15 kg. The surface structure and the number of layers affect the material consumption. If acrylic primer is applied in two layers, consumption per 1 m2 increases to 300 grams per square meter of surface.

Factors affecting consumption rates

Masters, seeing the condition of the surface, can quite clearly name the consumption of the primer per 1 m². These data are necessary when preparing an estimate and calculating the cost of materials required for repairs. You should also not purchase materials in advance, as the shelf life is limited.

Mathematical calculation

The required amount of material is calculated as follows: take the surface area and multiply by the average value (written on the label). This is how the amount spent per layer is calculated.

Consumption of deep penetration primer per 1 m² is determined by the condition of the base to be treated. As a rule, priming is done in two layers:

• The first is almost completely absorbed into the material.
• The second creates a solid foundation for subsequent finishing.

Sometimes it is necessary to apply three or even four coats. Some finishing specialists advise to calculate the consumption of the primer per 1 m² of the wall as follows: multiply the cost rate (the manufacturer writes on the label) by 1.15.

Tips from the masters

The craftsmen recommend increasing the planned consumption by 1 m² by 10-20%, the figure obtained if the walls or ceiling that are planned to be primed have significant damage, a porous structure.

In addition, it is worth paying attention to the tool with which the surfaces will be primed. When working with a roller, the consumption of primer will be higher than when using a spray gun

However, there is one more secret worth revealing. Some people prefer not to buy the entire intended amount of primer at once. This is the case when, if not enough, you can buy additional material without any problems. The main thing is to take a primer of the same brand and the same manufacturer.

Acrylic based primer

Self-priming walls

Inside the house, in the living rooms, we used a deep penetration acrylic primer, used for interior work with our own hands. It has no strong odor and is well absorbed into the surface. You can work in the temperature range from +5 to +30 degrees. An acrylic-based composition is used for external walls, the work can be done in the summer.

By their action, deep penetrating acrylic primers can be simultaneously called:

• penetrating;
• strengthening;
• antiseptic;
• universal.

Fungicides and other additives are added to the interior composition against damage by insects and mold. Antifungal and antiseptic mixture prevents larvae and pores from developing inside wood and other wall material. A large selection of protective impregnations is provided by the firms Optimist, Knauf, Ceresit. Axton and Lacra also have anti-mildew compounds.

Substances that repel water are added to the composition for outdoor work and, damp interiors. Antistatic agents do not allow dust to linger on the surface of the walls.

Acrylic composition for impregnating walls from different companies is distinguished by consumption and how long the layer dries. To choose the best option and purchase all materials from one company, Vadik made a table.

For materials with a loose texture: wood, foam concrete and others, glue is added to the primer. It binds cracks and pores together and increases the strength and durability of the material. The correct choice of impregnation determines how long the coating will last and when the next repair will take place.

A deep penetration primer for indoor and outdoor use is sold in plastic containers of different sizes and you can buy as much as you need for DIY repairs. For example, the Optimist composition with antiseptic additives is packaged in 1, 5, 10 liters. They are purchased by those who want to make repairs with their own hands. For professional use, containers of 50 liters are sold. This group of materials is united by the green Optimist sticker.

The reverse side shows:

• GOST;
• base - acrylic;
• composition;
• for which walls and floors it is applicable;
• additional components;
• consumption per 1m2 or how much surface in m2 can be covered with 1 liter of composition;
• additives against mold and mildew;
• color upon application and after complete drying;
• how much it dries before applying the next layer and how much until it is completely hardened;
• optimal temperature for storage and outdoor work.

Advantages and disadvantages

Acrylic primer has many advantages. It is a solution that does more than simply bond the finishing material to the treated surface. This component of the repair is distinguished by deep penetration - depending on the type, the plane is processed to a depth of 5 to 10 cm. A primer is necessary to strengthen the base, giving it strength. Even loose walls, which are characterized by porosity, become more homogeneous and denser after processing. If the composition has thickened, it can be diluted with plain water without loss of quality characteristics.

In addition to adhesion, this composition contributes to the fact that the walls absorb less moisture, this is important when pasting them with wallpaper. Reducing the absorbency of the base allows you to reduce the consumption of the applied finishing material. This has a noticeable effect on building materials such as self-leveling floors, wallpaper glue and even paint, for which the use of a primer allows you to achieve greater gloss.

This material does not reduce the vapor permeability of the surface.In the process of drying, a crystal lattice is created on it, which serves as a frame that holds the finishing materials. Along with the formation of a network, the acrylic primer protects the surface from the effects of harmful microorganisms. This liquid is also active in interaction with a surface on which there are minor impurities that impede the finish of the plane. The primer removes the negative effects of pollution.

In the case of paint, after applying the primer, the appearance of streaks, gaps and visible problem areas is minimized. It is noted that it is much easier and more convenient to apply paints and varnishes to a surface treated with acrylic primer.

This product dries quickly and therefore does not slow down the repair process. Such a primer is suitable for the chemical composition of the main part of the facing materials, it stands out for its hydrophobic qualities, which allows you to apply wallpaper glue and paint as evenly as possible. The disadvantage of an acrylic primer is the impossibility of covering the surface of ferrous metals.

Other disadvantages include a higher consumption of concentrated material, which requires a clear correspondence between water and mixture. Some varieties are not environmentally friendly. Therefore, in addition to outdoor work, their use is unacceptable. A universal composition cannot fully provide those characteristics that are inherent in each specific species.

Some varieties can be added to the composition of special acrylic paints (no more than 15% of the available volume).

The type of solvent used can be of the usual, fast, slow type of action, which explains the different degrees of drying of the primer. The shelf life is 2 years.

The texture of the primer is matte. On average, 1 liter is enough for 8-9 liters of square meters (with 1 layer of treatment). However, this indicator can vary depending on the type of substrate: the more the walls absorb, the more the primer will go away.

This material loses its properties in frost. Do not store acrylic primer in the cold. The total shelf life should not exceed 1 year. You need to put the product out of the reach of children. If the soil gets into your eyes, they urgently need to be rinsed with water.

This auxiliary material prevents mortar mixtures from drying out, eliminates the formation of air bubbles on the leveling layer. The application is suitable for cement-concrete screeds (including heated versions), ceramic and silicate bricks, wood, metal (iron ore), gypsum plasters, lime.

What factors affect the change in the proportions of the rate of soil consumption

When calculating how much primer is needed per 1 m2 of surface, it must be borne in mind that the amount of primer composition varies depending on certain factors:

• material of the treated surface. The amount of soil consumed for processing drywall, wood and steel is significantly different;
• method of applying the primer mixture. When spraying the soil with a spray gun, the consumption decreases, and when applied with a roller or brush, it increases;

It is not difficult to calculate on your own the need for soil using a conventional calculator

• structure of the protected base. For example, for aerated concrete, the primer is consumed in an increased volume, due to the porosity of the material;
• the type of soil used. Depending on the type of soil and its purpose, the amount of protective composition per unit area changes;
• the number of layers of soil applied. If a two-layer priming of the surface is required, the need for material increases;
• temperature and humidity. To optimize the consumption of the primer, it should be applied in a dry room at a positive temperature.

The primer liquid is sold in specialized stores in sealed packaging, which indicates the average consumption of the composition. In real conditions, the amount of consumed soil varies depending on the complex of these factors.

Primer consumption rate depending on the surface characteristics

Depending on the characteristics, the consumption of the primer per m2 of the wall differs.

Consider the approximate consumption of the primer liquid when applied to various materials:

• when priming a metal base that does not absorb the working composition, 80-90 g of primer is consumed for each square meter of surface. Consumption is determined by the brand of the soil used and its consistency;
• for surface treatment of gypsum plasterboards, universal soils are used, applied in one step. Plasterboard processing will require 95-115 g of acrylic primer per unit area;
• the plastered surface of the walls, characterized by increased porosity, needs a two-layer priming. In this case, the total consumption of the primer composition per square meter of the base will be 180-200 g;
• surfaces made of wood, as well as bases made of chipboard and fiberboard types, are coated with alkyd primers. Depending on the structure and moisture content of the substrate, the consumption is 120-150 g / m2.

Having completed a test coating of the surface to be treated, it is easy to determine the actual need for a primer composition. The actual values ​​may differ from the normative ones depending on the surface structure and the qualifications of the specialist applying the primer to the substrate.

It is not difficult to determine the actual need for a primer composition by performing a test coating of the treated surface.

Consumption of primer mixture for metal per 1m2

Specialists for metal priming choose a mixture without acrylic. Because acrylic does not prevent iron from rusting. The surface of the metal must first be prepared. There should be no rust or peeling iron on it. If they are still present, they need to be removed with special tools such as a dart brush. Because the old porous steel surface with defects tends to absorb both paint and primer. If you do not clean it, then the consumption of the mixture per square meter can double.

A resin-based epoxy primer is best for metal priming. It is designed for iron and concrete structures. According to general standards, the consumption of a primer for finishing metal will be from 60 to 100 g. This is the minimum indicator among all framed surfaces.

Primer GF-021 (The most popular mixture for metal)

Liquid "GF-021" is a suspension of fillers and pigments in an alkyd-based varnish with the addition of a drier, stabilizers and solvents. The composition is intended for metal and wooden surfaces to be coated with various enamels.

Consumption of primer GF-021 per 1m2 of metal is stipulated in the standard and amounts to 60-100 grams per layer. Of course, when calculating the amount of soil required for the production of work, do not forget about a couple of subtleties.

1. Consumption of soil for metal GF-021 increases when it thickens. The soil, willy-nilly, lays down in a thicker layer.
2. On porous surfaces, it also increases: part of the primer is absorbed into the base.

Technical characteristics and consumption of the primer mixture - table

It must be clearly understood that these are fairly average cost rates. The actual waste will depend on the condition of the material you are priming. Sometimes it is better to put several layers of soil on the material - of course, this increases waste.Some construction experts recommend keeping the factor and multiplying the standard rate by 1.15. The consumption rate of the primer is necessarily indicated by the manufacturer on the product packaging, and you can easily find it there.

Let's estimate the prices

In the building materials market, prices for acrylic primers vary widely. The price is formed by:

• functional specificity of the soil itself;
• conditions dictated by the manufacturer and supplier;
• the place where the production is located;
• brand rating;
• filling with modifying additives (the more there are, the higher the price).

For example, you need to apply concrete contact to a surface that is not completely non-wetting. Will there be tangible savings from pretreatment with the same brand of impregnating primer? Let's summarize in table 2 the prices and consumption rates

Sometimes it is still possible to make a direct calculation of the appropriateness of using a primer. For example, you need to apply concrete contact on a surface that is not completely non-wetting. Will there be tangible savings from pretreatment with the same brand of impregnating primer? Let's summarize in table 2 prices and consumption rates.

Table 2. Acrylic primer: consumption and price.

table 2

The table shows that in the case of using a preliminary layer of deep impregnation, we have a gain in the norm by 2-3 times and for deep penetration soil the price is 1.5-3 times less.

Similarly, you can estimate the economic feasibility of deep impregnation before applying any other primer. Acrylic primer, the price of which is the most favorable, is universal without special additives. Therefore, if the surfaces being trimmed do not differ in special defects and will not bear excessive operational loads, it is better to buy it.

Universal acrylic primer GOODHIM GU with strong antiseptic additives, high latex content, environmentally friendly and safe for health, suitable for strengthening substrates in a wide variety of rooms, including those with high humidity. Able to bind dust, reducing water absorption, and adhere to non-absorbent substrates. At the same time, it is very good from an economic point of view - the price is 153 rubles. for 5 liters.