Plastering of walls from plasterboard under the wallpaper

After plating the walls with GCR sheets, their surface is smooth and smooth. Therefore, those who make repairs themselves in an apartment or house often have a question: is it necessary to put plasterboard under the wallpaper. It would seem that just enough to seal the seams and hats from the screws, and paper to the paper and so beautifully glued. But, like any work, preparing a drywall for wallpapering has its own characteristics that affect the quality of the final wall decoration.

Why shpatlevat drywall under the wallpaper

Do I completely fill the plasterboard wallpaper? There are at least two important reasons to perform this operation:

1. If the wallpaper is made in light colors or has a small thickness, then through them, the joints and any irregularities on the surface of the GCR will clearly be visible. As a result, you get the impression of inaccuracy, which can be avoided, zashpatlevlev gypsum cardboard entirely.
2. But the main reason that you need to putty plasterboard under the wallpaper is that any decor on the walls can eventually get bored. So, the old wallpaper will have to be removed, which is not so easy to do, if under them there is no layer of putty. Removing the old coating can damage the sheets of plasterboard to such an extent, otherwise it will have to be leveled or even changed. So there is no doubt about whether to completely fill plasterboard under wallpaper, at least, to avoid unnecessary work in the future when replacing them.

Completely shpaklevat walls under the wallpaper should be if thin wallpaper or surface is poorly prepared.

Which one to choose the filler

? There are no principal recommendations what kind of putty is better suited for drywall under wallpaper. Special qualities of mixtures, for example, fireproofness or frost resistance, in this case do not play any role, it is more important to pay attention to the purpose of putty and in what room it will be used. So, plaster putty is more suitable for dry rooms, as it is afraid of large changes in humidityand can crack. Therefore, it is better for a bathroom or kitchen to apply cement based filler.

Leveling compound is good for sealing seams, cracks and dents. It has a coarse-grained texture, therefore, as finishing is suitable only if the wallpaper material has a large thickness and density.

The universal polymer filler can be used for both surface leveling and finishing. It is suitable for rooms with any humidity. And its consumption is less than that of other types of fillings.

When choosing which putty putty plasterboard for wallpaper preference is better to give a dry mix, as it is stored longer and it can be used dosed, mixing as much as necessary. Usually the manufacturer of putty indicates on the packaging instructions for working with the mixture and the necessary proportions, while you need to pay attention that some putty should be infused. To obtain a homogeneous mass, it is advisable to use a construction mixer, but if it is not, a special nozzle for a drill will do.

Surface preparation

Before starting to fill plasterboard, it must be cleaned of dirt and dust and carefully inspected for scratches, deep dents and protruding screws. This can help an ordinary wide spatula. Driving them on the plane of gypsum it is easy to detect various defects.

Unscrewed screws should be screwed with a screwdriver, slightly drowning their heads in the top layer of plasterboard. If there are screws, the caps of which have penetrated too deeply into the body of the GCR( more than half the thickness of the sheet), then they must be removed and screwed in a new place, at a distance of at least 50 mm from the old fixing point. A smaller distance is not recommended, since a hole may form between the holes, which is likely to spread further, which means that this sheet will need to be replaced.

If the gypsum boards at the joints do not have a factory chamfer, then their edges must be cut at an angle of 45 degrees. This is necessary in order for the putty to penetrate deep into the seam. In addition, at the edges of the sheets there should be no peeling of the paper from the gypsum. If such a defect is found, the cardboard that has departed must be carefully cut with a knife and the place primed. In more detail, how and what to cover the joints of plasterboard.

After visual inspection and detection of all defects, the gypsum board must be primed. As a primer, it is better to use water-based mixtures, since they impregnate only the cardboard layer and do not cause its deformation. The primer should be applied evenly over the entire surface of the drywall, a thin layer. When it completely dries, you can proceed with the pre-shpatlevaniyu.

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Pre-shpatlevanie

Pre-putty plasterboard for wallpaper with their own hands is aimed at leveling the surface and includes:

• sealing joints and joints;
• putty of screws;
• putty of corners;
• alignment of dents and other defects.

Putty joints between sheets and gypsum joints with walls, ceiling and floor should be started with a reinforcing tape sticker - serpentines. It is important to glue it so that the recessed groove is in the middle of the tape. Now you can apply the putty. Work is done from the top down, while it is convenient to use two spatulas - narrow and wide. The first one can fill the seam with a mixture, and the second one can smooth it along the surface with longitudinal movements. Putty should not be spared, because when drying it gives a significant shrinkage. As a result, a completely filled seam should be obtained, without omissions and appreciable depressions. It is better if there is a small excess of putty - it can then be removed with an abrasive mesh.

On the screws putty is applied crosswise. So it completely fills the grooves from the fasteners' hats and hides its heads.

When plastering walls from plasterboard under the wallpaper, perhaps the most difficult operation is the corrugation of the corners of the .For the outer corner, a perforated corner made of aluminum is often used, or, if the corner is arched or curved, plastic. It is quite easy to install such a profile. To do this, you need to attach a corner to the place where it is mounted. Make a pencil mark, and then cut the gypsum board along lines that are about 3 mm from the markings, if you look from the corner. After that, use a chisel to remove the cardboard to a depth slightly larger than the thickness of the corner. The grooves obtained are filled with putty, and then the angular profile is pressed into them so that it is slightly deeper with respect to the wall plane. The putty applied through the perforation is smoothed out with a wide spatula with the addition of the mixture to make the surface leveled with the plane of the sheet. Video about puttying walls and ceilings.

The inner corners are shredded a bit harder. First, they, like the stitches, are reinforced with a sickle. Secondly, in order to evenly withdraw both adjacent sides, they are shpatlyuyutsya alternately - first one side, then, after completely drying the first, the second. It facilitates the work of a special spatula for corners, which can be easily found.

Dents, deep scratches and other defects are fixed in a standard way. In this case, if the putty needs to be applied in several layers, then each subsequent layer is superimposed only when the previous one has dried. To assess how smoothly the wall is plastered, you can use the usual building level.

Having finished the preliminary puttying of walls from plasterboard, it is necessary to grind them with a grinding net, clean and again cover with a primer.

Finishing putty plasterboard

Finishing putty gipsokartona under the wallpaper will get an impeccable surface for further finishing. For this stage is suitable wide spatula, and the mix itself should be comparable in thickness to sour cream.

The putty is applied in wide sweeping movements, so that its layer is as uniform and thinner as possible. If they still can not avoid small influxes, they are later lined with sandpaper. The main thing here is neatness, slowness and thoroughness.

After complete drying of the finish coat, the surface is cleaned of dust and ground again. This eliminates possible minor defects and prepares walls from plasterboard for wallpapering.