Painted walls are a beautiful and stylish solution for any interior. We will tell you how to choose and apply primer, so that the paint lay well and lasted as long as possible.
All about grinding walls
Why apply primerVarieties of primer mixtures
Special means
Duration of drying drugs
Calculate the flow
Ground right
At the end of the repair, I want its result to be preserved for a long time. But, unfortunately, it does not always happen. The neglect of the technology of work leads to the fact that after a short time, the painted walls begin to crack, the coating is peeled and falls. So that this does not happen, the competent primer of the walls is necessary before painting. We will analyze how to do everything right.
Is it necessary to progress the walls before painting
Beginners finishers do not always understand why preparatory work is conducted. It seems to them that the most important thing is to align the base, then you can safely paint. In fact, this is not quite so. Indeed, before staining it is very important to align the coating. There should be no drops, cracks and other flaws. Therefore, the first step of competent training is alignment. It can be done in different ways: plasterboard, plaster, etc.
Competent priming - a prerequisite for high-quality painting wall
-->In the last stage, the finish putty is most often applied, which will become a database for painting. The next mandatory step is a priming. It is necessary because the soil:
- Strengthens the base. It binds into a single whole weak, porous and loose surfaces, makes them more durable. Especially good with this cope with the compositions of deep penetration. They are able to delve into 80-100 mm, while ordinary drugs do not fall deeper than 20-30 mm.
- Improves adhesion or adhesion of finishing material and basic coating. Thanks to the rig of paint, it is better held on the surface, it is prevented its detachment and cracking. Moreover, with the subsequent repainting, the base will be easier to prepare for work.
- Reduces coating consumption. After processing, the absorbent properties of the base are significantly reduced. Thanks to this, the composition for finishing finish will be required less than a third.
There are materials with special properties. They are able to increase the moisture resistance of the surface, prevent the appearance of mold, etc.
Printing is the necessary stage of finishing work. Soil Improves Found Characteristics
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Types of soils
The range of primer for walls is diverse. By type of foundations, they can all be divided into several groups:
- Acrylic. Universal, well suitable for wood, concrete, chipboard, plaster, drywall, etc. It can be used for porous coatings, dries around 5 hours, odorless. Not applied to metals.
- Gliftale. Scope - metal and wood. It dries about a day, loses properties in conditions of high humidity.
- Alkyd. A good option for any wood. After processing the fiber is slightly extended, which significantly improves adhesion. Dries about 15 hours.
- Perchlorvinyl. Universal drug, which is used for plasters, metal, plywood, wood, etc. It dries quickly, it takes about an hour. It is better to choose it for outdoor work due to high toxicity.
- Epoxy. A two-component means that significantly increases the adhesion of the base. Apply for metal and concrete.
- Mineral with plaster, cement or lime. Used for concrete or brick. Dries from three hours before the day.
- Aluminum. Use for wood. Additionally protects it from infection with fungus.
The optimal and most sought-after option can be considered universal primers that are suitable for almost any materials. They improve the adhesion of the foundation and strengthen it, but do not have special characteristics. However, in most cases, the latter and not required.
The primer needs to choose correctly, based on the base type
-->Specific characteristics of solutions
If there are special conditions in the room, you may need to choose a special purpose primer. It may be a primer:
- Antiseptic. It presents an antiseptic that prevents the development of microorganisms. Protects the wall from the appearance of fungus or mold.
- Moisture-proof. It gives the surface water-repellent properties, which is necessary in rooms with high humidity.
- Deep penetration. Strengthens loose and porous bases. Prevents peeling and cracking of decorative coating.
- Contactless or adhesive. Improves adhesion with finishing composition. Used for an inevitable smooth surface.
On the packaging of the drug will necessarily be recommendations for its use. The types of materials with which it combines and the conditions of application are indicated. Neglect this information is not worth it. If the tool needs to somehow prepare for work, this should also be specified.
Primers may give the basis of specific characteristics: moisture resistance, resistance to fungus and mold
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How much driving the primer before painting
This is a very important point affecting the quality and speed of repair work. The manufacturer always informs about the time of drying the solution. However, this is an approximate value, and almost always indicates a particular number, but the time interval during which the composition is necessary to expect. This is because various factors affect the rejection rate of the funds:
- Humidity and temperature indoors. The optimal is 60-80% of humidity and + 15-20 s. In any case, it is impossible to air the room until the soil dries. Make it need to apply it. If this rule fails, the probability of cracks appear is great.
- Quality and type of foundation. Porous and dry surfaces dry noticeably faster. If for some reason it is necessary to speed up the process of drying the primer, the basis for its application should be deguted.
- Composition of the drug. Faster harvested means with easily volatile solvents and those where solid inclusions are added.
- The number and thickness of the superimposed layers. Each subsequent increases time for drying the wall.
To say exactly how much the primer is dry before painting it is impossible. It must be determined visually. You should wait the time recommended by the manufacturer, after which to touch the primer with hand. If moisture is felt, staining will have to postpone.
To please the result, it is necessary to paint only a smooth, primed, dried wall.
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How to calculate funds
To determine an approximate amount of material, simple calculations should be carried out. To begin with, we define the area you want to be primed. This can be done, multiplying the height of each wall at its length, and then folding the results. It is important not to forget to deduct the area of doors and windows. We should have a certain number of square meters.
Now we determine the rate of consumption of the means. It must be specified on the package. Rarely when one number will stand in this case. More often shows a small plug of quantities. This is due to the fact that different types of base absorb in different ways. Knowing, with what kind of coating is to work, choose the number and multiply it to the number of squares calculated earlier.
Determine the number of layers. If one is needed, it will only be left to multiply the result on the coefficient of 1.15 to get some material stock. In the case when two or more layers of primer are supposed to be applied, multiply the calculated value for their number, and then the coefficient. So we get an approximate amount of primer, which is focused upon purchase.
The required amount of primer depends on the type of base, the number of its layers, absorbity and the other
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Primemer application technology
Before starting work, prepare tools. Minimum set:
- Roller foam or velor;
- brush for hard-to-reach places;
- Painting bath for solution;
- Rafting for cleaning.
Printing is carried out on the already prepared surface. It should be aligned and well cleaned from dust. If the base is porous, for example, the finish putty or plaster, no additional preparation is required. Smooth surfaces, such as fiberboard, it is desirable to sand a fine-grained skin. Thus, the adhesion of the material will improve. The skirt is fixed on a painting grater, it makes much easier for work.
Malyary tray - the best tank for primer. It simplifies the process of working by roller
-->When the coating is prepared, proceed to priming.
- Preparing the composition for work, guided by the instructions. Dry mixes need to be dissolved with water. Ready to use, for example, water-emulsion, open and mix well.
- Pour the remedy into the greasy tray.
- We take a roller and, loyering it into the primer, carefully process the wall. Do not leave dry places, but do not allow drowshes that reduce the quality of processing.
- We take a brush and pass it all hard-to-reach areas.
It is so applied first layer of soil. If the basis is too loose or porous, you will need to apply primer again. In this case, it does not matter how much the solution dries, the second layer is imposed on the wet basis. After that, they are waiting for complete drying and only after that, but not earlier than in a day, proceed to painting.
The brush is good for hard-to-reach areas, but you can handle it all surface
-->The primer for the tree under painting is shaved a little differently. The process of preparation for its application begins with the treatment of bitch, especially if the wood is fresh. The spatula removes the resin, protruding over the bitch. When it reappears it, we take a thermopyard and warm the fragment, while collecting the measuring resin. Then grind the base of sandpaper. After collecting all the fine dust moistened in a solvent with a rag.
All sections with knots are processed by a special insulating or shellac. This will prevent possible leakage of the resin. Now you need to make sure that there are no fat spots or resin residues. When detected by removing them with extraction gasoline or nitro-solvent. After that, you can proceed to priming. It will correctly put the composition on the wall with a brush. Handling wooden The ceilings are carried out similarly.
Progressing for all the rules does not take much time
-->The answer to the question is whether it is necessary to primed before painting putty, wood, plasterboard and other materials will always be positive. The primer will strengthen the coating, give it additional useful characteristics, increase the adhesion and reduce the flow rate of the finishing compositions. The priming itself is carried out quickly and does not require any special physical expenditures.