Finishing work

How to paint plaster walls: paint selection and step-by-step instructions

Painting plaster walls is a quick and inexpensive way to give them an attractive appearance. With a good selection of colors and shades and perfectly smooth plastered walls, the surface will look no worse than after finishing with other types of materials. In this article, we will look at what colors cover the walls after leveling them with plaster, as well as how to do the painting yourself.

 

Choice of paint for plaster

 

painting plaster walls

Despite the variety of coloring materials, not all of them are universal. There are special compositions separately for external and internal work.

Exterior materials include those that are used for finishing facades and foundations of buildings and meet the following requirements:

  • moisture resistance;
  • durability;
  • durability;
  • efficiency;
  • resistance to the negative effects of precipitation;
  • long-lasting color and resistance to fading.

Paints for interior work have more sparing requirements, among which the most important are:

  • vapor permeability;
  • moisture resistance;
  • resistance to minor mechanical damage.

Also, washable paint should be used to finish the interior walls.

Both types of paints differ in their component ratio and base.

 

For internal work

 

When working indoors, acrylic, water-based, latex, oil paints, and enamels are used.

Type of dye Dignities Disadvantages Consumption*, kg / m2
Acrylic paint Moisture resistance, strength, durability, ease of application. Consumption is higher than that of water-based emulsions. 0,18-0,25
Water-based paint Easy to apply, cost-effective, non-toxic, the ability to process any type of surface, including gypsum and using detergents, good mixing with colors to get any shade, high drying speed Low water resistance, fast moisture absorption. 0,1-0,15
Latex paint Moisture resistance, environmental friendliness, high drying rate for washable paint, relief surface selection. The viscosity is higher than that of water-based emulsions, which causes some difficulties when applying. High cost. 0,09-0,2
Oil paint Moisture resistance, possibility of wet cleaning, durability, glossy gloss. Low fire resistance, Flammability, increased consumption. 0,11-0,13
Enamel (alkyd paint) Moisture resistance, possibility of wet cleaning Toxic, pungent smell. 0,1-0,18

* – indicates the average value for 1 layer on a smooth surface.

Since the paint is not applied immediately after plastering because it may lie unevenly, if it is necessary to paint quickly, the plaster can be covered with several layers of whitewash without putty.

 

For exterior decoration

 

Paints for facade finishing should be more wear-resistant. They are not recommended for interior finishing works due to the toxicity of the material and low environmental friendliness, since this type of dye is developed specifically for use in harsh conditions.

Type of dye Disadvantages Consumption*, kg / m2
Latex / acrylic paint Color saturation, chemical resistance, resistance to fading and temperature changes, good dirt-repellent properties. 0,11-0,135
Silicate paint Moisture resistance, resistance to the formation of fungus and mold, dirt and burnout, vapor permeability, increased adhesive qualities. 0,15-0,3
Acrylate-silicate paint Moisture resistance, vapor permeability, resistance to precipitation, the possibility of tinting. 0,17-0,2
Silicone paint Moisture resistance, resistance to mechanical damage, wide range of colors. 0,25-0,3
Alkyd and oil paint Increased moisture resistance, flexibility, poor resistance to UV light. 0,1-0,11

* – the average value for 1 layer is specified.

 

Tools for the job

 

how to paint plaster walls

The necessary tools include:

  • paintbrushes of different sizes;
  • foam and pile rollers;
  • grater or fine-grained sandpaper for grouting individual areas;
  • tray for paint;
  • personal protective equipment when working with coloring material (gloves, respirator, safety glasses);
  • ladder.

Besides, after plastering, you may need a spray gun to apply the dye to a large area of the walls. When repainting and creating a structural coating, you can use rollers with special attachments.

 

Preparatory work

 

Before you start painting, you need to prepare the walls.

To do this, perform the following steps:

  1. The wall surface must be clean of dirt and dust. If there is an old coating, then it must be removed so that the new dye lies flat, and a layer of old paint does not appear under it.
  2. All existing cracks, chips need to be repaired with cement mortar. Potholes and depressions are covered with putty. The treated surface must be covered with plaster for 2 times.
  3. After applying the plaster mixture, it is desirable to sand the treated area until it is completely smooth – the paint will fall easier and easier on a flat surface, set better, and dry faster.
  4. to increase the adhesive properties of plastered walls are additionally covered with ground solutions. As a primer, it is recommended to use acrylic compositions with deep penetrating properties.

Priming the walls should preferably be done twice, each layer should dry well. Acrylic primer compositions are used not only for processing the base surface for painting with acrylic dyes, but also other types of paints.

 

Wall painting

 

After carrying out preparatory work, they start painting.

Technology. How to paint plaster walls

“It should be remembered that the application of each subsequent layer of paint on the plaster is possible only after the last coating of the primer has completely dried.”

In this type of work, it is recommended to adhere to the following technology:

  1. window and door openings, stationary furniture, and plumbing are covered with film.
  2. In a tray filled with dye. Material consumption will depend on the size of the wall and the number of layers.
  3. Painting begins with hard-to-reach places and corners – for this purpose, paintbrushes of different sizes are used.
  4. for even distribution, the dye is applied from left to right horizontally, then from top to bottom vertically. In this case, first, a long – pile roller is used, then a medium-pile roller, the pile length is from 9 to 11 mm.

Also keep in mind that to get a rich color, you need to paint the walls at least 2 times. The more layers you apply, the darker the final coating will be. Each subsequent layer can be applied only after the previous one has completely dried.

When painting plaster, you need to consider the following nuances:

 

  1. Each manufacturer indicates on the packaging its material consumption per 1 m2 of the surface to be treated.
  2. to get the desired shade of white paint, you can add color or pigment dyes – the addition is made at the stage of mixing the paint in the tray.
  3. To reduce the density of the mass will help supplements of water or solvent in small amounts. Oil paints are diluted with drying oil, alkyd-white spirit. The introduction of additives should be carried out in small doses to avoid breaking the bond between the components of the dye.
  4. The painting works must be done with a temperature from +5°C.
  5. to avoid visible joints when painting, the edges should be carefully shaded before the solution dries.
  6. If you plan to zone a room with a wall finish and one surface is painted in several different colors, then the borders of the color change are separated from each other with masking tape, and you need to stick it to the entire height of the wall.
  7. Masking tape is also used to protect unpainted surfaces and objects: switches, sockets, contact points of fixed plumbing, or stationary furniture.
  8. during the entire process, it is desirable to exclude moisture from entering the area to be painted. The same applies to direct sunlight: the paint dries unevenly, spots will appear on the surface.

Also, you will have to plaster all the surfaces again, even if part of the walls have long been finished. Otherwise, there will be the heterogeneity of color and shade.

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