The design of wall surfaces with wallpaper or paint coatings places the highest demands on the state of the original coatings. Not only the requirements for reliability and cleanliness of the substrate must be observed, but also the clear geometry of the entire working platform is maintained. Drywall finishing technology for wallpaper can be called optimal in terms of achieving these training objectives. Another thing is that the quality of its implementation will depend on many factors, including not only the skills of the performer, but also the chosen method of installation.
Features of drywall as a finishing material
Gypsum plasterboard sheets - a light natural material for the internal surface cladding, thanks to which it is possible to smooth the base for further laying of the decorative coating without special efforts. In this case, we are talking about sticking wallpaper, the structure of which is sensitive to the slightest flaws in the surface. Initially, for such purposes, it is recommended to purchase large-format drywall panels with the expectation of a minimum number of joints. Installation is carried out by glue or frame method - the main thing is to ensure a flat surface with minimal differences and slopes.
Theoretically, wall decoration from drywall for wallpaper can not be performed if high levels of alignment have been achieved and technological gaps with mounting holes are completely hidden. But for greater reliability and preservation of insulating functions, experts still advise performing a basic coating of finishing materials with a primer and putty. The presence of an intermediate layer will eliminate the risks of the negative influence of cold bridges and increase the structural strength of the decoration.
Sealing joints between sheets
This is the final touch after the installation of drywall and the first stage of preparing the revetted walls for covering with wallpaper. Its essence is to pinpoint the remaining joints between sheets of drywall and fastening holes, if the technique of frame installation of the material was chosen. This finish is distinguished by an emphasis on structural function. The material for filling the recesses should fit into the panel structure as organically as possible, preserving its technical qualities.
The best choice of material for this gypsum board finish for wallpaper is a gypsum putty mixture, which after hardening can be easily corrected with a fine abrasive grinding tool. In the process of termination, the composition must penetrate throughout the depth of the seam and into the recesses remaining from the mounting hole. At the same time, if large panels were installed to overhaul problem surfaces, it is advisable to putty the joint gaps using reinforcing mesh to ensure the highest mechanical resistance of the coating.
Finishing plasterboard corners
Particular attention is paid to the construction angles as the most exposed areas . They should be reinforced with special profiles in combination with the same gypsum putty. And you can choose from several options for profile fittings:
- Steel galvanized corners. The most durable and durable option, but also requires an appropriate base for fastening. Suitable if thick panels with the appropriate layer of putty are used.
- Aluminum corners. Lightweight, stainless and generally easy to install products that are easy to install with your own hands. Finishing drywall wallpaper with aluminum inserts holds its shape well, but also requires careful surface sealing with a thick layer of putty with a preliminary primer.
- Plastic corners. A lightweight version of the angular profile with low requirements for external termination. This solution is suitable if it is planned to further apply paints and varnishes.
How to choose material for decorating drywall for wallpaper?
As in the case with the joint sealing material, it is advisable to focus on gypsum filler compounds. This should be an environmentally friendly product, although it is not worth completely eliminating mixtures with polymer additives. Nevertheless, the coating is used not only to create an even layer, but also to maintain a number of protective and insulating functions. The size of the fraction of particles should be small - about 0.15 mm. As for the volume, it depends on the planned thickness of the layers. So, if it is planned to finish drywall for wallpaper in a wooden house, then the coating should reach a thickness of 3-4 mm. Accordingly, the consumption will be about 2-3 kg per 1 m 2 . In the case of ordinary concrete walls, the finish can be limited to a thickness of 1 mm - then the consumption will be within 0.8-1 kg per 1 m 2 .
Preparation for finishing events
Even when laying a thick layer using high-strength putty compounds preliminary preparatory procedures should be performed. First of all, the reliability of drywall fastening is checked - all flimsy and weak areas should be adjusted and, if necessary, updated, since after repair such repair will be impossible. Further, the entire surface of the coating and especially the edges are cleaned of dirt, dust and lagging fibers. To do this, use a light grinding abrasive, but without a radical invasion of the sheet structure.
Before finishing the drywall for wallpaper, it is important to eliminate the slightest traces of dust, so it will not be superfluous to clean it with an industrial vacuum cleaner. After completing all the preparatory work, the surfaces are dried.
Application of the base layer, the purpose of which is to eliminate recesses and irregularities remaining after sealing joints and mounting holes. Also in the list of primer tasks is the adhesion function - that is, adhesion of the putty to the surface of the panels. As for the specific compositions for priming gypsum plasterboard for wallpaper and painting, it is best to use vapor-permeable and quick-drying mixtures with polymer dispersion.
Such coatings are applied after dilution with water (1: 1 ratio) with a brush, brush or roller with a thin layer. Quick-drying formulations require an exposure time of about 3-4 hours. This interval must be strictly observed and proceed to the next stage without delay until the new layer is covered with fine dust.
The plaster putty is completely laid using a wide spatula with a handle. The first layer should fix the primer structure, after which the finish layer is applied directly. It should be aligned with the rule, smoothing out bumps and other defects. In the instructions for finishing drywall under the wallpaper, it is also noted that in order to achieve a high-quality leveling effect, the surface after hardening should be treated with a grinding tool. If the work is carried out in a room with high humidity, then a waterproofing film is also included in the interlayer structure of the putty.
The use of drywall as a structural base for the subsequent laying of decorative materials justifies itself for various reasons. For example, this technology allows you to achieve a combination of smoothing and surface cleaning effects, which is especially important in the presence of problem walls with defects and deviations in the structure of the base. But the key role from the point of view of the final result, of course, will be the decoration of drywall for wallpaper with its positive technical and operational characteristics.
There will be no problems choosing the right composition, as advanced manufacturers of building mixtures offer vast families primers and putties especially for gypsum-based panels. It only remains to correctly lay the composition on the prepared structural basis, taking into account the individual requirements for a specific decorative coating.