Plasterboard putty for painting by own hands - technology

To achieve the geometric correctness of walls and ceiling can be two ways - plaster uneven surfaces or trim them with sheet materials on the profiles. In both cases, the final alignment is the treatment with special dry mixtures. Putty plasterboard for painting has its own characteristics, which must be taken into account when carrying out repairs.

Than and how to process a surface that the paint kept long? This will be discussed in this article.

Kinds of putties

Modern putty on its physical state are of two types: dry and pasty. In the first case, the mixture must be diluted with water before use. Pasty putties are ready for use without preliminary preparation, it remains only to open the lid of the package. In both cases, these are finely divided compositions. This distinguishes them from plasters, which are designed to eliminate large surface defects.

Cement, polymer, gypsum acts as an astringent in dry formulations. Paste-like leveling compounds are made mainly of polymer binders. The area of application of putties depends on the main component. Traditionally, leveling finely dispersed compositions are applied to the surface in several layers. The first layer is the leveling (preliminary, rough) mixture, the second - the final (finish).

What putty putty plasterboard for painting?

Mixtures of gypsum binder are used in indoor dry premises. This species is now the most common. Such compositions are easy to apply and sand, while the color of the material remains white. And this is the determining factor in the subsequent coloring.

Gypsum is incompatible with hydrocuring astringents. These are cement mixtures. Therefore, the use of such formulations on gypsum bases is prohibited. Putty plasterboard for painting should not be based on cement. In general, it is allowed to process gypsum plasters with cement leveling compounds, but only with a high-quality primer.

Polymer putty is an ideal base for painting. The grain size of their very small (almost invisible), it is due to this is achieved an even surface.

Technology of application of mixtures

Building materials are supplied to the consumer, accompanied by instructions for their use. Most of the requirements for different kinds of putty is the same.

Leveling dry mixes are prepared before work, diluting them with water in the ratio indicated on the package. Properties of ready-made putties are valid for a certain time. For each type of mixture it is different. The average "lifetime" of putties ranges from 5 hours to 24 hours, then the ability to evenly distribute over the surface is lost.

Putty plasterboard for painting with their own hands is done with a spatula. There are stations for automatic application of such compositions, but they are used on large-scale construction projects. And as a putty used polymer compositions.

Technology of applying the mixture: basic stages

The surface on which it is planned to apply the first rough coat of putty should be cleaned of dust, grease stains. The gypsum boarding should not contain unevenness at the joints and protruding parts of the fasteners. If such defects are present, the knife cuts the joints, and the heads of the screws are deepened by 1 mm.

The technology of plasterboard putty for painting consists of such stages: preparation of the substrate, application of the starting mixture, finishing composition, priming, grinding of the surface after each coating and dedusting.

The first layer is stacked in the seams, every fastener cap is glued. To ensure that the joints do not crack after painting, the reinforced paper tape along the joints of the gypsum boards is fastened to the bare first layer. After 12 hours of drying, sand, descale and prime the surface.

This treatment is necessary to equalize the absorbency of the substrate. Putty plasterboard for painting requires a two-layer rough application of leveling compounds. And the second time you need to create a continuous cover.

Final stage before painting

When the covering layer dries, it is polished. If before that, the putty is used, the third layer is created by the finish composition. It helps to achieve an even and smooth surface due to small particles in its composition. That is the finish putty of gypsum cardboard for painting is mandatory. It can be neglected before the wallpaper is pasted, because the unevenness under the layer of roll material will be hidden.

Apply the final coat before painting very thinly. There is a special technique for finishing the finish, called "on the scuffle". This is when, after applying the mixture, it is removed with a spatula perpendicular to the surface. As a result, the smallest irregularities are filled with microparticles, and an even basis is obtained.

After completely drying, the surface is peeled off, dust is removed from it. Then you need to walk a primer. These actions will ensure an even distribution of the paint over the surface. If you do not primetovat finish layer before painting, then increase the consumption of coloring material.

Working with a spatula

Puttying of gypsum plasterboard under painting and walls is carried out with two special spatulas - spatulas: wide (300 mm) and narrow (90 mm). A smaller tool takes the leveling compound and shifts it to a larger one.

Continuous putty implies laying the mixture with a thin layer on the gypsum board. And when applied from left to right, the spatula is held so that its left side is below the right. It turns out that to the left of the instrument is a smooth application, and on the right a layer of putty is formed, which is removed from the wall or ceiling and is used for the next laying.

The value of the applied layer is regulated by the angle of inclination of the trowel to the base. The smaller it is, the strip of putty is thicker. The standard angle for application is 60 degrees. At 15⁰, the smoothing is performed on the surface being processed, which must be performed, overlapping the previously smoothed strip by 2 cm.

Sealing of joints and processing of corners

Joints between gypsum sheets are sealed using a paper tape so that in the future, after the final cladding, cracks do not appear. Initially, the putty is applied perpendicularly to the seam with a putty knife, after which the surplus is removed by moving along the seam from bottom to top. Such manipulations are carried out when the plasterboard walls are putty for painting. When working with transverse joints on the ceiling, the surplus of the building mixture is removed in the direction of "from yourself."

In both variants, a reinforcing tape is applied to the undamaged layer , and the joints are re-treated with a spatula.

External corners are sealed using perforated elements. And in the inner corners a serpyanka is laid, and the spatula is used indirectly.

Quality of mixture

The puttying of the ceiling from gypsum plasterboard under painting on the exit implies a perfectly smooth surface. Until the moment of painting it is possible to check the quality of the leveling layer. For this, a flashlight and a level are used. It is necessary to install the instrument to a wall or ceiling and to hide behind it a small size of a light source. If there are no gaps between the level and the surface, then there are no differences and roughness. And this is a sign of quality grinding.

If still small irregularities are present, it is better to walk again with sandpaper or a grinder. Finishing putty is cleaned with a fine-grained abrasive. This applies to gypsum mixtures. Due to their high plasticity, polymer compositions do not require grinding.

Recommendations for best results

The application of leveling compounds should take place at an ambient temperature of +5 to +30 g. The same temperature should be the surface of puttying. Avoid direct sunlight when aligning. But it's more about outdoor work.

To putty plasterboard for painting after the completion of repair did not give cracks, it is necessary to comply with the technology work. A common mistake is the wrong preparation of the solution. It is necessary to add water by instructions and carefully mix the ingredients. Cracks can occur when laying a mortar layer more than 1.5 mm at a time. Therefore, the use of a primer at each stage of the work helps to achieve a fine application.

Do not neglect the expectation of complete drying of putty before the next stage of laying. It is a mistake to believe that for a better grasp of the material, a forced airing of the room is required. Skvozniaky - the enemy of unheated plaster. An important condition for achieving a quality result is the choice of sound material.

What putty putty plasterboard for painting? Reviews about Knauf

Construction forums reveal a picture of leaders among the leveling mixtures used in modern repair. Popular mixes for internal work on gypsum boards were Knauf, Cerezit and Vetonit mixtures.

TM "Knauf" is known for its building materials based on gypsum. The manufacturer for the puttying of internal premises has developed the technology of work and adapted its products for it. For the sealing of seams between GKL it is proposed to use the product "Fugen" and "Uniflot". For the finish line the "Rothband Profi" line has been developed, which is delivered ready-made, which excludes the possibility of making mistakes in the preparation of the right solution. Feedback about the materials of this TM is positive.

If you finish the finish "Rothband Profi" "on the scuff", then you get a smooth and thin strip of white color. For comparison: putty "Vetonit LR" (polymer) in consistence is more liquid, and this is a minus in the convenience of application. In addition, after its leveling, furrows remain, which indicates a lack of plasticity of the material. And the color after laying it on the surface is not quite white.

What kind of putty to choose for gypsum cardboard for painting, the master will tell. If repairs are carried out on their own, then it is better to try to buy Knauf products.

Finally

Putty, primer, dry mixes need to buy one price level. Do not type materials cheap and expensive at the same time, otherwise their incompatibility may arise. Each manufacturer produces a line of its products, designed for a specific technology of work.

And if you choose TM "Knauf" for sealing joints between sheets of gypsum board, you should purchase a primer, putty mixes and a finishing solution of the same company.