Prepare a wall to be covered with paint or wallpaper
Easy to medium depending on the state of the support.
Glue or double-sided tape.
Cutter, sharpened scissors.
Knife to coat.
Decorating a wall with a paint or wallpaper reflects the desire to beautify the room. For this reason, the result must be as perfect as possible so that the wall covering makes the desired effect. The success of the decoration depends logically on the quality of the products used, the conditions of installation, the techniques used but especially the quality of the support. It is therefore necessary that the walls be clean, dry, smooth, flat and without cracks.
Through this sheet, you will find the different controls to be realized and methods to be applied to obtain walls or a ceiling perfectly prepared to be decorated.
Method 1: Treatments of a "sick" wall
An interior wall can be considered sick if it has areas of moisture or mold. It is important to treat your walls against these problems in order to increase the resistance of your coating over time.
If you identify the presence of moisture in your walls, by dark spots, blisters or by the embossing of your old paint, it is necessary to eliminate the causes of these infiltrations of water:
Repair or reinforce the seals of the moisture source.
Install additional vents.
Apply a sealant on the offending areas.
If these solutions fail to prevent your walls from moisture, it will be necessary to provide more in-depth solutions. Do not hesitate to consult a professional.
On a wall, molds appear as dark spots and appear on the surface of the coating or joints. Their presence is related to the humidity of the room as well as its low lighting by natural light. This is why molds usually form in the bathroom and some parts of the kitchen.
To remove these fungi, wash the contaminated surface with diluted bleach (1 part bleach per 4 parts water). When cleaning, protect your hands and eyes and wear work clothes that are safe to be damaged. Rinse the area thoroughly with a wrung sponge.
Method 2: friability of the wall.
If your walls look friable, do not apply any coatings without applying a hardener over the entire surface. This will ensure a good performance over time of your painting or your wallpaper.
Method 3: Cleaning.
This step is mandatory regardless of the previous coating of your walls. For an optimal result, a support must be clean, without any greasy spots or dust. To guarantee a pristine wall you can:
Wash your walls with an alkaline detergent (St-Marc type) then rinse thoroughly. Start at the bottom of the support, which will allow you to better control the runs that will be difficult to recover.
Use a stain remover on stubborn stains.
A soft bristle brush for encrusted stains.
Feel free to broom all surfaces to get rid of any dust that would affect the adhesion of the coating.
Method 4: Repair a cracked wall or ceiling.
You can consult our sheet maintenance and repairs: to make disappear the cracks and the holes of the surfaces.
Method 5: Prepare an already painted wall.
If a wall or ceiling is already painted with a lacquer or other paint finish, it is necessary to prime the surface so as not to impair the adhesion of the new coating. At first, clean the media as described above. Then sand your walls with a coarse abrasive (80-100). To limit the hardness of work, use an eccentric sander or a vibrating sander, which will allow you to work more regularly and faster. For corners, finish with sandpaper.
Remember to dust off the walls and the room after sanding.
Method 6: Prepare a flouring wall.
If your wall is covered with whitewash, it is possible that over time it becomes flourishing or powdery. In order to prepare the installation of the coating, pass a scrub brush vigorously over the entire surface. Put a broom on the holder, then rinse with a sponge and let it dry. To check the success of your work, pass your hand over the surface, if your palm is white, you must repeat the operation.
In order to guarantee the final result, it is recommended to make a smooth coating before any application of a wall covering.