In Europe and America, preliminary priming of the surface began to be produced several decades ago, but in our country this technology has been introduced relatively recently. Therefore, for some compatriots, no, no, and the question will arise about the expediency of priming. Having received a convincing answer to this question, they begin to puzzle over the second question - about what will be the primer consumption per 1m2 of surface, how much it needs to be purchased and what this material actually is.
So, a primer is a special material that penetrates deep into the base and fixes it, which makes further, final, construction work of the highest quality.
It is clear that a special primer has been developed for each type of surface. The most familiar to us is the primer applied to a wooden or metal surface before painting it.
But similar compounds have been developed for concrete. They are applied to the concrete surface beforelaying tiles, and 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 in such a way that its components and fillers make it possible to give the surface to be treated the desired qualities - porosity or smoothness, stickiness or water-repellent properties, etc.
Let's move on from theory to practice. Do you know how to properly prepare the surface for wallpapering? Consider this process step by step using the most relevant example - preparing 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. Unseparated areas are re-soaked and scraped off 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 absorbs quickly, it may be necessary to apply another coat. Therefore, it is better to take a primer for surface treatment for plastering with some margin.
For example, the consumption of Knauf primer per 1m2 is 200 ml per 1m2, and in order to process a 3x4 room 2.5 m high (ceiling and walls), it will take about9400 ml emulsion. That is, in order to treat problem areas several times, it is necessary to purchase "Isogrund" weighing 10-15 kg.
After the treated walls have dried, you can proceed to the second stage.
Rough wall plaster
After removing the old wallpaper, the walls have a rather unsightly appearance - it is required to level the potholes and close up the cracks and cracks that have formed. For this, rough plastering of the walls is carried out.
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 spread the plaster over the surface in a thin, no more than 0.5 cm layer - a thick layer will crack when it dries.
We are waiting 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. The main thing is that it is advisable to purchase primer materials from one manufacturer.
Final smoothing of the surface is performed with putty, which allows for better leveling and elimination of defects left after plastering.
The putty is applied to the walls with a layer of several millimeters using a spatula.
Again let the walls dry well, and you can proceed to the next step -primer.
Final wall primer
The expediency of priming will be clearly visible when you need to replace old wallpaper. Where the surface under the wallpaper was 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, a real primer has antiseptic qualities - it kills mold and pathogens - so the wall will not turn black.
Applying a primer layer contributes to the 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 1m2 of plaster will be indicated on the label, and it will not be difficult 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 begin to glue the wallpaper.
Any type of repair begins with determining the scope of the work being done and purchasing the necessary materials. If you want to carry out repairs on your own, then without knowing the truths that are simple for builders, for example, what will be the primer consumption per 1m2, how much it will take to purchase the same tile or wallpaper, you cannot do. Otherwise, you may be faced with the need to interrupt the repair due to a lack of the necessary material, or, even worse, to purchase material in excess - and this is a waste of money.
