Can wallpaper be glued to the OSB board? Indeed, such a need really arises quite often. The answer is definitely yes. The main thing is to properly prepare the surface. There are only 2 ways to do this so that the wallpaper does not come off after a short period of time and does not change its color. Read about how to glue wallpaper on the OSB plate in this article.
Consequences of pasting on an untreated surface
Pasting untreated OSB boards with wallpaper can entail a lot of negative consequences.
- Correct installation of OSB boards implies the presence of technological joints between the elements in order to compensate for the linear expansion of the material. In addition, the surface of the slab itself is uneven and uneven. In this regard, after the wallpaper dries, all these places will be clearly visible. Exactly like the caps of the screws. All the decorativeness of such a finish will be reduced to naught;
- Under the influence of temperatures, synthetic resins and paraffin wax will be released from the surface of the boards. Accordingly, they will appear in the form of spots on the wallpaper;
- OSB boards are additionally impregnated with special solutions that ensure their moisture resistance, but at the same time reduce the adhesion of the surface with any other composition. Wallpaper glue will simply roll off, like primers;
- If you do manage to apply glue to the surface, it may cause the surface to swell. Therefore, it is simply necessary to create an intermediate protective barrier.
All OSB boards, depending on the formaldehyde content in them, can belong to two categories – E1 or E0. All of the above is more true for plates of class E1.
Features of gluing plates of class E0
Wallpaper can be glued to E0 class boards with a minimum surface treatment of the base. It is enough to close up the joint seams and carefully prime the plate.
After that, you can use these types of wallpaper:
- Thick vinyl or non-woven wallpaper with a pronounced relief on the surface;
Glass fiber. If you will use material of light shades, we recommend that you first open the board with white insulating paint;
Liquid wallpaper. Due to their consistency and ability to level surface irregularities, they can also be applied after priming and sealing the slab joints.
All smooth and thin types of wallpaper can be glued only after processing the surface of the board in one of the following ways.
Method number 1 – without putty
This method is often used in order to reduce finishing time and in the absence of skills in working with building mixtures.
In this case, the surface of the slabs is processed as follows:
- First, you need to seal up all the joints between the plates. It is best to use a white or clear acrylic or silicone sealant. If this step is neglected, over time, folds may form on the wallpaper at the junction of the two plates. In no case should the sealant protrude beyond the plane of the slabs, its excess can be smoothed out with a rubber spatula, which is usually used to rub the tile seams;
- When the sealant hardens, it is necessary to smooth the surface of the boards and increase their adhesion level. If you will glue smooth and not very dense wallpaper, the surface must be sanded. For thick vinyl or non-woven wallpaper, glass wallpaper or liquid, the surface can be treated with coarse sandpaper. At this and the next stage, be sure to use eye and respiratory protection – there will be a lot of dust;
- Remove wood dust from the surface. This can be done with a brush;
- Now we start priming. You can use purchased formulations (the Ceresit CT17 deep penetration soil has proven itself well) or prepare the composition yourself. To do this, you need to mix PVA glue and pure water in a 1: 3 ratio;
- It is necessary to prime with a purchased composition at least 2 times after each previous layer has completely dried. If a homemade solution was used – at least 3;
- Many experts, after the soil has dried, claim that the surface is ready for pasting. However, many users from personal experience advise nevertheless covering the primed plates with white interior paint. If possible – in two layers. After the paint has dried, you can start gluing the wallpaper. The procedure will be standard.
I would like to note right away that if after a few years you have a desire to re-glue the wallpaper, then it will be quite difficult to do this. The canvases will stick to the interior paint very tightly. And, secondly, if the walls are still shrinking, then one sealant filling the joints will not be enough. Over time, these places will fall through, and the wallpaper will tear. We can conclude that this method will be successful only for finishing utility rooms or a summer residence. For finishing a residential building, it is better to use the second method.
Method number 2 – using putty
This method is more laborious and costly, but it will provide the desired result.
Of the tools you will need:
- Spatula set;
Mixer and drill;
- Capacity for mixing putty;
- Fur roller with a long handle for applying a primer;
Construction stapler and staples;
- Painting corners;
- Serpyanka mesh;
- Sanding mesh and plastic float with mesh clamps.
Now more about the OSB surface treatment process:
- Similar to the first method, we seal the seams between the plates and prime the surface. No need to grind the plates;
- Now we will mask the caps of the screws and re-seal the seams. For these purposes, we need plaster. Plaster “Rotband” from “Knauf” is suitable;
- Using a small spatula, you need to close up all the places, as when sealing joints on drywall;
- As soon as you process the first joint, glue the serpyanka mesh over the not frozen solution;
- After you have processed all the joints, you need to fix the mesh on the free areas of the slabs. Use a stapler to fix it. The smaller the step between the braces, the better. Fasten with a maximum interval of 10-15 cm;
- Begin laying the mesh from the outer and inner corners, door and window slopes. Be careful – the mesh at the corner should be a single canvas, and not consist of two overlapping pieces;
- After that, fix the painting corners at all the corners you need in the same way, using a stapler over the mesh;
- After that, prime the entire surface again;
- Stir in a small amount of putty and apply the first, not too thick rough coat and let it dry;
- Clean the surface irregularities with a wide metal spatula, grind the surface with a plaster mesh, clean it from dust and apply primer again;
- Apply a finishing coat of putty. Let it dry, clean and sand the surface and prime again. By and large, this is already enough. But for the best result, it is recommended to apply a third layer of finishing putty;
- After it dries, the surface is carefully sanded and primed. After that, you can safely start gluing wallpaper.
A few more tips to help you get the job done better:
- The joints of the wallpaper canvases should not coincide with the joints of the OSB boards;
- Do not neglect reusable priming. The primer closes the small pores in the putty and creates a thin film on its surface, which will prevent the composition from getting wet under the glue;
- Be sure to avoid drafts during and after work.
Subject to all the rules, wallpaper pasted over on OSB can last at least 5 years.