Ceilings

Do-it-yourself priming of the ceiling before painting. Instructions for preparing the ceiling for finishing

In order for the finishing of the ceiling to be as successful as possible, it is necessary to properly prepare the surface for work. Priming is a very important stage, which should not be neglected in any case. Let’s talk about the features of preparing the ceiling for painting further..

Table of contents:

Ceiling primer types and features

The main components of the primer are the coloring pigment and the substance for the formation of the film. The number of layers is determined by the individual characteristics of the room and the evenness of the ceiling. With a maximum drop of three millimeters, it is recommended to use a deep penetration primer.

The main purpose of the primer is to reduce moisture absorption by the surface. Plastering the ceiling without a primer will result in uneven moisture distribution. At the same time, the level of adhesion of the ceiling to the paint decreases, its drying out and the loss of attractiveness of appearance.

In relation to the type of surface, there are several types of primers:

1. Acrylic primer – contains acrylic polymers, applied to concrete, wood fiberglass, plastered, brick, cement surfaces. The water-based composition is applied before applying the water-based paint.

Please note that in residential premises it is allowed to use only alkyd, acrylic and mineral based compounds.

2. Alkyd compound – highly durable, used on tiled, glass, steel surfaces. It is strictly forbidden to use an alkyd primer on plasterboard and plastered surfaces..

3. Mineral version of the primer – the most popular, used on surfaces made of brick, concrete, plaster, aerated concrete, foam concrete. The main components of such a composition are substances in the form of cement, gypsum, lime.

To paint a wooden, metal ceiling, use a paint-based primer. Linseed oil, synthetic or natural resin is used for its manufacture. Compositions with a special action are also distinguished, they make the coating anti-corrosion and moisture resistant.

A deep penetration primer strengthens the surface, penetrating deeply at a distance of 0.3 to 2 cm.Some formulations are distinguished by the presence of antiseptic inclusions that improve resistance to fungus, mold, decay.

A quartz-type primer contains sand, after application to the surface, it makes it rough, thereby improving adhesion with subsequent finishing materials.

Some primer options are a full-fledged coating, in which case they are applied in several layers. The first of which involves diluting the composition with water.

It is not recommended to treat indoor ceilings with enamel-like primers. Since these formulations contain an alkyd resin that is unsafe for human health.

Features of priming the ceiling with various types of primers

In relation to the type of further finishing, the following primer options are distinguished:

  • under the enamel;
  • for water-based paints;
  • universal formulations;
  • special purpose trains.

It is possible to independently make a primer by diluting water with putty and PVA glue or diluting the paint with a solvent in a ratio of four to one.

The primer for enamel contains pigment inclusions, resins and additional additives. For dilution, a solvent or thinner is used. The water-based primer contains latex additives and a synthetic dispersion. For dilution, use the formulations recommended by the manufacturer in the instructions. Water-based primers are widely used for application to ceilings and walls. After drying, forms a high-density coating.

In addition, there are universal compounds that are suitable for almost any type of finish. Increase the strength characteristics of the coating, significantly save on finishing materials, especially when using paint.

The emulsion primer is used to strengthen old loosened surfaces, contains a modified version of vinyl, which has good moisture-resistant characteristics. An emulsion-type primer is applied to surfaces made of concrete or plaster.

For porous surfaces made of wood or plasterboard, use a latex-based primer with reinforcing properties. This tool performs the function of preparing the ceiling for further finishing. Strongly not suitable for lime surfaces.

Benefits of a primed ceiling

The primer is applied to the ceiling both at the stage of preparation for finishing and after it. The composition forms a protective coating that protects the ceiling from external irritants and mechanical influences.

Among the main advantages of priming the ceiling in a private house, we note:

1. Leveling the surface – the primer perfectly fills all the pores, eliminating additional construction defects.

2. Improves surface adhesion to various types of finishing materials. After the primer dries, the surface becomes rough, due to this it adheres well to paint, putty, tiles, decorative plaster and other finishing materials.

3. It has an antiseptic effect – the presence of antimicrobial components in the composition, increases the resistance of the coating to the appearance of fungus, mold, corrosion.

4. Improved fire safety – this is an advantage inherent in certain types of primers that make the surface non-combustible.

5. Moisturizing the surface and reducing paint consumption. Priming the surface leads to the creation of a transparent film that reduces the porosity of the ceiling, while significantly reducing the consumption of the coloring composition.

Concrete, plastered and plasterboard ceilings must be primed. This not only reduces the cost of further finishing materials, but also improves the performance of the coating..

Before re-painting the ceiling, it is recommended to first apply a primer. In this case, the composition will reduce the risk of staining after staining..

Ceiling priming before painting has the following advantages:

  • paint evenly on the surface;
  • moisture does not penetrate into the depth of the ceiling, especially for the kitchen and bathroom;
  • the coloring composition dries evenly;
  • the paint consumption is reduced by at least 1.5 times.

Before choosing a primer, determine the type of surface to which it will be applied, as well as the option for further finishing. The technology for applying a primer to plastered, plasterboard and wooden ceilings is different. With high-quality plastering work, it is enough to cover the surface with one layer of primer, wait for it to dry and proceed with further finishing.

Ceiling priming preparation: tool preparation and primer selection

Before starting any repair work, it is necessary to free the room from furniture and other objects blocking the space. Perform a number of such activities in advance:

1. Clear out the room. Remove the chandelier from the ceiling, if present. Cover the floor with plastic wrap.

2. De-energize electrical wiring as you are dealing with a humid environment. And the ceiling must be moistened during operation.

3. Cover the window and door openings with foil to avoid contamination..

It is recommended to finish the ceiling before finishing the walls, in this case, the risk of damage to the wallpaper or painting is minimized..

Observe safety precautions when priming the ceiling, use only high quality tools and personal protective equipment. Be sure to wear a lightweight hat to avoid getting the primer on your hair. Also, prepare a respirator or cotton and gauze bandage. Gloves are desirable, but not required. From the tools for priming the ceiling, prepare a metal lightweight stepladder, a steel spatula, water and a container for it, several different rollers and brushes.

The initial stage is based on the removal of the old coating. If there is whitewash, wash it off with water, for this use a roller that is periodically dipped into a container for collecting water. Apply water evenly to the ceiling surface, repeat the process several times. After the whitewash gets wet, remove it with a sharp metal spatula. Next, wipe the ceiling with a rag well moistened with water.

If polystyrene tiles were previously installed on the ceiling, then it is enough to remove the tiles with a spatula, and then get rid of the glue residues.

Removal of paint is carried out using special solvents, a hair dryer or sandpaper. First, we recommend using the mechanical method, for this, using sandpaper or a metal brush, remove the paint from the surface. If after that, the paint remains on the ceiling, use a hairdryer to warm it up and use the mechanical removal method again. A simpler, then costly method of applying a solvent, with which the paint is washed off the ceiling with plain water.

After getting rid of the old finish, the ceiling should be processed:

1. Inspect the surface, remove the plaster that does not adhere well to the ceiling.

2. Check the joints between the wall and the ceiling, if there are voids, clean them, and then cover with cement mortar or putty.

3. Check the evenness of the ceiling, apply the primer in several coats.

4. This is followed by the process of filling the ceiling, which takes place in two stages. Each of the layers of putty is pre-primed.

5. Upon completion of filling, the surface is also covered with a primer to reduce paint consumption..

Do-it-yourself ceiling priming: features of calculating a primer for a ceiling

The consumption of the primer is determined by the type of surface on which it is applied, as well as the number of layers. A concrete primer creates a roughness on the surface, most often it is applied in two layers. In this case, putty, tile, plaster are used as a finishing material. The standard consumption of such a primer is 250 grams per square meter..

Among the advantages of a concrete primer, we note:

  • fast drying;
  • resistance to alkaline environment;
  • moisture resistance;
  • ease of application;
  • vapor permeability.

An antiseptic primer is often applied to the ceiling to prevent mold and mildew from growing on it. Most often, it is used to treat bathrooms, basements, baths and saunas. The consumption of such a primer is 300 grams per square meter..

There are two main technologies for applying a primer:

  • manual;
  • mechanical.

Any primer is a concentrated substance that is diluted according to the manufacturer’s instructions. Prepare a primer container that fits the roller. When using the manual method, the application of the primer is carried out with a roller and a brush. The mechanical method involves the use of a spray gun.

Please note that it is necessary to dilute the primer strictly according to the instructions, an excessive amount of water reduces the function of the composition and leads to its uneven drying. The first coat is applied perpendicular to sunlight. The next layer is applied in reverse to the previous one..

For correct application of the primer, match it to the ceiling. First remove dust, dirt from the ceiling and be sure to degrease the surface. The first layer is applied to the cleaned ceiling, the second before plastering.

The interval between coats is at least two hours. In any case, read the instructions before starting work. A combination of several primers on one ceiling is possible. The first layer has moisture-repellent characteristics, the second is antiseptic. Some experts recommend, in this case, to use a universal composition that has a multifunctional spectrum and is great for any surfaces..

Ceiling priming video: