In the countries of Europe and America, the preliminary priming of the surface began to be made several decades ago, but here we have introduced this technology relatively recently. Therefore, some compatriots have no, no, and there will be a question about the appropriateness of priming. After receiving a convincing answer to this question, they begin to puzzle over the second question - what will be the consumption of the primer per 1 m2 of the surface, how much it needs to be purchased and what this material actually is.
So, the primer is a special material that penetrates deeply into the base and secures it, which makes further, final, construction work as high-quality as possible.
It is clear that a special primer has been developed for each type of surface. The most common for us is a primer applied to a wooden or metal surface before painting.
But similar compositions are designed for concrete. They are applied to the concrete surface before laying tile, as well as before painting or wallpapering.
There is also a primer designed for surface treatment before applying putty and plaster.
In general, the composition of the primer is selected so that its components and fillers make it possible to give the surface to be treated the desired qualities - porosity or smoothness, adhesiveness or water-repellent properties, etc.
Let's move from theory to practice. Do you know how to properly prepare the surface for wallpapering? Consider this process step by step on the most relevant example - preparing the walls for wallpapering.
Removing old wallpaper and priming the surface of the walls. Primer consumption per 1m2
Initially, you need to clean the walls of old wallpaper. Usually they are well moistened - then the wallpaper is easier to move away from the surface of the wall or ceiling. Not separated sections are again soaked and scraped with a spatula.
Now you need to prime the surface of the walls. It will be convenient to do this with a roller or with a spray gun (then the primer consumption per 1m2 will be significantly reduced). Sometimes, if the surface is too porous and the primer is absorbed instantly, it may be necessary to apply it with another layer. Therefore, it is better to take a primer for surface treatment for plaster with a certain margin.
For example, the consumption of the Knauf primer per 1 m2 is 200 ml per 1 m2, and in order to process a 3x4 room with a height of 2.5 m (ceiling and walls), about 9400 ml of emulsion will be required. That is, in order to handle problem areas several times, it is necessary to purchase Isogrund weighing 10-15 kg.
After the treated walls have dried out, you can proceed to the second stage.
Rough wall plaster
After removing the old wallpaper, the walls have a rather unsightly appearance - you need to align the potholes and close up the cracks and cracks that have formed. For this, rough walls are plastered.
Prepare the plaster - dilute the dry mixture with water in the proportions indicated on the label, and mix thoroughly until a homogeneous solution is obtained.
The prepared solution is applied to the surface of the walls with a spatula and trowel. It is important to distribute the plaster over the surface with a thin, not more than 0.5 cm layer, a layer - a thick layer crack when dried.
We wait for the plaster to dry completely and proceed to puttying the walls.
Finish wall alignment
Putty is sold as a dry mix or immediately ready to use. Which one you use is not so important. Most importantly, it is advisable to purchase primers from one manufacturer.
With the help of putty, the final smoothing of the surface is carried out, which allows to achieve better alignment and elimination of defects remaining after plastering.
Putty is applied to the walls with a layer of several millimeters using a spatula.
Again they give the walls to dry well, and you can proceed to the next stage - the primer.
Final wall primer
The expediency of priming will be clearly visible when it is necessary to replace the old wallpaper. Where the surface under the wallpaper is primed, the wallpaper will be removed in one strip, and the plaster under them will remain intact - it will not stretch along with the panel. In addition, this primer has antiseptic qualities - it kills mold and pathogenic microbes - so the wall does not turn black.
Applying a primer layer promotes uniform absorption of wallpaper glue, reduces its consumption and increases the adhesion of wallpaper to the surface of walls or ceilings. The primer consumption per 1 m2 of plaster will be indicated on the label, and it will be easy to calculate how much it needs to be purchased.
The primer is applied to the walls and ceiling with a foam roller, and in hard-to-reach places - with a paint brush.
After it dries, you can start gluing the wallpaper.
Any type of repair begins with determining the scale of the work and purchasing the necessary materials. If you wanted to make repairs on your own, then without knowing the truths simple for builders, for example, what will be the consumption of a primer per 1 m2, how much you need to buy the same tile or wallpaper, you can not do. Otherwise, you may encounter the need to interrupt the repair due to a lack of the necessary material, or, even worse, to purchase the material in excess - and this means waste of money.