Preparation of the base involves not only its primer, but also the preliminary removal of the old coating, which sometimes lingers for a long time at the stage of reflection, how to remove plaster from the wall. And this question really requires a thoughtful approach, since the once applied finishing layer can crumble from a careless touch (which would be wonderful) or, on the contrary, hold extremely firmly. We will proceed from the worst option and get ready for serious work.
Before you remove the plaster from the wall ...
Even if you yourself once finished walls, having firmly decided to remove the old coating, you will have to get to know it again, or rather, check for strength. To do this, we arrange a small test using a conventional spatula, which in the near future will need to clean the walls. Nothing complicated, just tap the surface of the walls every 30-40 centimeters with the handle of the instrument, listening to the sounds. If the blows are sonorous, as if you applied them to concrete, then the stucco mixture holds firmly in this place. Another thing is if the sounds are deaf, with a little more effort in such a section, you can easily bring down a whole layer of plaster.
Another sign of poor contact of the coating with the base is the presence of wet spots on the surface, but this can only be observed in rooms with a high level of dampness. It is also unambiguously possible to recognize the site as unreliable when it is clearly cracked. Having discovered at least one of the listed signs, you can safely immerse the edge of the tool in the thickness of the coating and clean off everything that lends itself without the application of effort. Keep in mind, you always need to remove a little more than it turns out, somewhere around 40 centimeters around the shot. However, a spatula may not be able to cope with such a task, and then other methods come to the rescue.
Removal of solution with a perforator
The easiest and most effective way to remove it is to use a drill or puncher with a “wide chisel” nozzle for them.
- We put the nozzle on the tool, turn on the chiselling mode.
- We put the punch to the wall at an angle of about 80 degrees and break through the layer to its entire depth.
- Immediately reduce the angle to 30-40 degrees and in this position we move the tool along the wall, removing the plaster.
The same is with the question “how to remove plaster from the ceiling”: we work with a puncher.
Please note: we use a large angle of entry in cases when we break through an untouched area, and we start the movement from already processed areas with a small one. In the process, we make sure that the puncher, in the process of removal, does not damage the material of which the wall itself is made.
How to remove old plaster from the walls: the video illustrates the work of a puncher.
How to remove plaster from the walls with a peeling spatula or chisel
You can remove the old solution without using a power tool. This is done with a wide chisel or peeling spatula. We lean the tool against the wall vertically and, tapping it with a hammer, poke a recess throughout the thickness of the coating. Next, we tilt the chisel / putty knife at 45 degrees and continue to work from the “beginning”: moving in any direction with continuous tapping with the hammer on the handle.
Note: this method of removing the coating from the walls is the quietest and does not entail the appearance of dust clouds. However, it makes sense to use it only when you need to delete a small area, since the speed will be very low.
How to remove old plaster from the walls: use a peeling spatula
Removing decorative plaster
How to clean the walls of plaster, if it forms a very thin layer? Such a question arises in cases when it is necessary to remove the decorative finish. If in the case of leveling coatings they had to be knocked down, then here we will grind or scratch. The fastest way to work with a grinding peeling machine. On its "sole" are serrated rollers that rotate to remove a small layer from the surface.
How to remove decorative plaster from the walls: using a power tool is very easy
Removing textured or Venetian plaster in this way will not be difficult. When the machine is on, we press the “sole” against the wall and move it side to side with pressure. The number of passes in the same place is determined visually: the rough coating is exposed - we proceed to the removal of the next section. Surface cleaning is quick and with a minimum of physical effort. Minus - the need to purchase a not too cheap tool.
How to remove decorative plaster from the walls: work with a grinding and peeling machine
Features of removing plaster from different surfaces
The easiest way to remove gypsum plasters. They are quite loose and at the same time sensitive to moisture. Therefore, about 15 minutes before the start of removal, we thoroughly soak the walls. Acetic acid can be added to the water. This will make the finish soft and pliable. The same goes for lime and clay plasters.
And how to remove plaster from the walls, if it is made recently and from good concrete? Too strong and thick coating is sometimes difficult to remove even with a punch. In this case, the Bulgarian will help us. We cut the surface with it to the depth of the finish, with squares of about 50x50 cm. Further it will become much easier to remove. And if there is a brick wall under the plaster, then do not forget to walk along the seams with a chisel to remove the remnants of the finish, which at first glance are not noticeable.
How to remove old plaster from the walls: you can pre-wet the gypsum surface
Do I need to remove the old durable plaster?
The need to completely clean the wall depends on the specific situation. Some compounds are easier to remove, others more difficult. In addition, the removal of old plasters is not always justified. But in other cases one cannot do without it.
The relevance of cleaning the walls depends on the composition of the plaster:
- Clay. Most often used in the decoration of fireplaces, heating shields. The destruction, delamination of the clay finish leads to the need for its replacement, since the thermal conductivity is reduced.
Cleaning is inevitable when tiling the stove, for which a denser base is needed.
- Limestone. It is removed when the layer is weakened, and if necessary, apply cement-sand plaster.
- Gypsum The plaster is dismantled as it collapses.
- Cement. It is often dismantled due to design errors made by previous builders (violation of the requirements for cement-sand plasters).
- Polymer. Most polymer plasters are durable. Any solutions can be applied to them. Therefore, the removal of synthetic masses is associated with errors made during their application, leading to delamination and cracking.
The advisability of removing plaster should be justified. Plaster is not a wallpaper; it is not recommended to change it without a good reason.
Old coatings can be removed in whole or in part. It depends on the state of the layer and the composition of the future, a new coating:
- Repairs. Finishing requires partial repair. It is better to remove weak, loose, stratified fragments. If the area of the stucco retaining strength is small, the wall is completely cleaned. But if the damage is not significant, you can not touch the wall, clearing only the problem areas.
- Replacement. A new solution can quite firmly fix on the old (but durable). It depends on the hardness of the previous coating and the composition of the fresh.
New plaster should not be stronger than the previous one, so that, while shrinking, it does not destroy the old weak finish, which has less tension.
So, on a cement-sand plaster (if it is not loosened), you can put any other solution. Cement can not be applied to gypsum, since the latter will destroy the surface of the previous one, adhesion will be insufficient, short-lived. Limestone is reliable as a base for gypsum and clay. But nothing can be applied to clay plaster (except clay) - it will not hold. But the clay-sand mixture itself is applied to any base.
How to remove old plaster from the walls.
Before dismantling, the wall is carefully examined to determine the condition of the finish. If replacement of the coating is not expected, then it is enough to remove only poorly-held fragments and areas around the cracks.
To determine the strength of the connection between the coating and the wall surface, it is tapped with a blunt metal object (hammer, pickaxe). In places of tight fit, the sound of blows is more sonorous.
Any movement of the layer under the pressure of the tool is a sign of insufficient adhesion to the base. Such fragments are necessarily exposed.
How to remove old plaster from the walls manually.
It is convenient to use a steel spatula with which to fall off pieces falling off, cut them off. Strong parts are brought down with a pickaxe, an ax or a chisel.
General rule for all types of plasters: Before dismantling, the finish must be moistened well. This will soften it and significantly reduce the amount of dust.
Drywall under the plaster can be easily damaged. Therefore, strong shocks are excluded, it is better to work in cycles - a tool similar to a well-honed spatula.
First, the integrity of the coating is violated in weak areas, a small fragment is cleared to gain access to the end face of the layer. Then, having driven the cycle under it, it is necessary to remove the plaster.
If it holds firmly and does not lend itself, you can use the chisel, chisel, tapping on it with a hammer.
It is better to keep the lock at an acute angle so as not to destroy the drywall.
What kind of power tool is suitable for work.
Do not knock down strong compounds, do not remove with a hammer. It’s easier to pick up a hammer drill - an electric drill with a slotting mode. True, with this approach, the level of noise and dust is high, which is not always acceptable.
A grinder with a disk designed to work with the appropriate material, cut the plaster into small squares, which are subsequently knocked down with a chisel or perforator.
Small pieces of the solution are more convenient to remove with a grinder with a coarse-grained “sandpaper”. It is advisable to use equipment with the possibility of suctioning dust. For example, using a vacuum cleaner.
First, weak areas are removed along the entire wall, working with a pickaxe, a chisel. Only then they begin automated work.
How to remove decorative plaster from the walls.
Plaster decorative plasters are relatively easy to remove. But with polymer or silicate certain difficulties may arise: these compounds are very durable.
Since it is not always possible to remove the plaster from the wall without difficulty, it is left. This is acceptable because polymer coatings can be a reliable basis for a new finish with any solution.
Savings associated with dismantling old finishes.
The cost of repairing a room can be reduced by removing only exfoliated layers. That which holds very firmly is recommended to be left. This will make it possible to level out a smaller amount of solution.
It is rational, for example, to buy a more expensive mixture, but to put it thinly. And “gain” the main thickness with the same composition with which the wall was previously covered. The cost of such repairs is minimal, although finishes with a high price per square meter are used.
If a situation arises in which it is more advisable to order work for professional finishers, then self-preparation of the working surface can become a source of savings. Indeed, the dismantling of plaster will increase the fee per square meter. m., because the team will have to do more work.
This is not advisable - preparing walls does not require special knowledge or experience. It is economically more profitable to pay only what experts charge per m2. skilled work.
Where to put the waste from dismantling.
The problem of recycling the remnants of the old finish is quite acute. It is not always possible to take it out and the time, due to the remoteness from city landfills, the work of public utilities.
In apartment buildings only export is possible. You can divide the construction waste into packages and take it out to a container, if public utilities do not prohibit this. The weight of cement plaster with 1 m2 formed during the dismantling can be calculated, knowing its approximate thickness.
For example: the mass of 1 cubic meter of screed is 1000-1500 kg, which means a weight of 1 sq. M. 1 cm thick - 10-15 kg. The average thickness of the plasters is 1.5-2cm. So, from a meter of the wall you get 15-25 kg of waste.
In private homes coping with the problem is easier: waste can be used.
- Cement and sand screed. It is used for filling tracks, filler in concrete solutions for pouring sidewalks, sites.
- Clay plaster can be stored at the site for reuse. In this case, there is no need for mixing the solution, since the proportional ratio of sand and clay has already been established, the materials are thoroughly mixed. Just soak them.
- Leftoversgypsum plaster is used as bulk insulation in the construction of floors of household buildings.
- Lime plaster - Good soil underlay, on which the growth of trees is not desirable.
Before you remove the decorative plaster from the walls, it is advisable to prepare a place for storage of waste.
It is better to store the remains of plaster until the moment of implementation under a canopy. Otherwise, they will get wet in the rain. This will increase their weight, making loading a garbage truck a little difficult.
Clay waste is generally combined into a single monolith if stored “in bulk”.
It is more convenient to load waste into bags.
Since plaster can be removed from the wall quite easily, the room quickly “heals” with dirty, dusty waste. Now they need to be taken out.
Small loose construction debris is easier to store in bags. To make it easier to load, you must use a bucket without a bottom. A bag is put on from below, the bucket is placed on the floor. Loading is carried out by a scoop, a shovel.
When the bucket is full, it is lifted so that the contents fall into the bag.
How to remove old plaster without unnecessary labor
Not always the coating should be removed entirely. And not all cracking cases mean a weakened finish. Everything is relative and each case needs to be considered separately, although general rules still exist. The main one is that the finish is an unnecessary retention factor and you need to get rid of it, whether it be paint or wallpaper. By the way, in the process you can "lose" and most of the plaster layer. To remove the paint, you still need the same spatula, it is easier to remove the wallpaper after wetting it. If something (or all) of the leveling finish is left, then it's time for the above tests.
If cracks are found, carefully inspect them for shedding edges, tap the coating in this area. If the dull sounds from the blows are not heard, and the stucco itself is strong enough, just strengthen this place. With an ax or other tool with a sharp strong edge, embroider the crack so that it has the cross section in the form of the Latin letter “V”. Later, with the new treatment, the primed “trenches” will be filled with two-thirds of the solution, after which they will again be covered with soil for final smoothing. After grouting from the cracked areas there will be no trace.
In some cases, even the most reliable sites have to be removed. The reason usually lies in the excessive thickness of the old coating, which is impractical to withstand due to modern materials that open up new possibilities. In this case, before removing the old plaster, it is necessary to treat the entire surface with warm water so that the finish is well saturated with moisture, later it will be much easier to remove. During the cleaning process, you will also need to regularly spray the walls to prevent dust from occurring, or at least reduce its amount.
Instructions for removing decorative trim from the walls
To remove decorative plaster from the walls, you need to perform a job that consists of two stages: hinging and smoothing the surface with putty.
Before you begin the first stage, you need to collect everything you need for this. Namely, those materials and tools that are useful to you.
The list of materials for removing the coating from the walls:
- gypsum putty,
- paint (if you paint the walls after removing the plaster),
- oil primer.
Scheme for removing old plaster.
Tools that will be required to remove decorative plaster:
- polyethylene film,
- wet cloth
- bucket with water,
- cycle (or putty knife, chisels, hammer, grinder, grinder - your choice),
- spray gun.
When all the materials and tools are ready, you can begin to work.
Methods for hinging a decorative coating from a surface layer
We start from the first stage - looping. There are several ways to do this work. They differ from each other in different tools with which you can perform it. Which ones you will use, choose yourself.
Plaster irrigation scheme with a spray gun.
Удаление декоративного настенного покрытия — дело очень пыльное, поэтому не забудьте застелить все поверхности полиэтиленовой пленкой, чтобы меньше было грязи в комнате (это относится ко всем способам). Далее возьмите циклю длиной 130-150 мм и проведите ею по стене, слегка нажимая. Once you’ve chosen the right corner of the app, get started. With light movements with the correct tilt, you can cycle the finish: first, start with a small part of the surface, then move on to a large one. After that, wipe the walls with a cloth soaked in water to remove all particles and dust from the remaining decorative plaster. Rinse the fabric more often with water to better clean surfaces.
If you do not have cycles, you can use a hammer and a spatula. To do this, you first need to moisten the surface with a decorative finish with plenty of hot water. This is done in order to soften the putty well and reduce dust. Do not forget to wet the entire surface of the walls with water throughout the work, then removing the plaster will be easier. After you wet the surface, you need to tap the wall with a hammer. Due to this, those parts of the plaster that are held loose will fall off by themselves. Well, others will need to "help." To do this, you need a chisel and a hammer: the putty layers pry off, and they fall off the surface in pieces. You will also need a putty knife, with which you can clean the remains of the finishing material. Please note that you need to remove the decorating decoration material from the top of the vertical ceiling.
You can also remove decorative plaster from the walls using a grinder with abrasive disks. Using this tool, plaster is erased, not knocked down. But do not forget, you still have to moisten the surface, otherwise you will drown in a "sea of dust." Tune in to work, as you will have to spend a lot of effort on polishing the surface. Decorative plaster must be removed carefully, do not forget about the seams. After everyone has freed the plaster, walk along the wall with a metal brush to completely remove it. This is one of the most effective methods if hot water does not help.
Other ways to remove trim
If the decorative coating is firmly bonded to the surface, then only the grinder will help, since it has great power. Unlike a grinder, this tool works faster. Please note that you need to work with the grinder carefully, using special nozzles that do not spoil the walls. When connecting it, direct it to the wall, but do not overdo it so as not to spoil the wall.
If decorative plaster (liquid wallpaper) was applied to a dirty surface, to paint, then it will be difficult and long to remove. To do this, use an industrial dryer. He softens the paint, which is under the wallpaper, and then with the help of a spatula they remove it and liquid wallpaper.
In order not to mess around with the removal of plaster (liquid wallpaper) for a long time, they can be masked.
To do this, the surface layer needs to be sanded: smooth the convex parts, and roughen the smooth ones.
Now you can proceed to the second stage - leveling the walls with putty. To do this, clean, dried surfaces must be treated with an oil primer. Do not forget, work should be done with gloves and in a well-ventilated room. When the primer dries, you can cover the surface with gypsum putty. Try to apply it so that the walls are smooth. For this you need a wide spatula. After the work has been done, putty should be allowed to dry for about 24 hours. After a day, use a spray gun to moisten the walls. Then again apply a second coat of putty to the walls. And let dry the same time as before. After 24 hours, apply a small layer of finishing putty to the surface. Try to keep the coating smooth.
Advice from experts (for those who do not want to “suffer” with the removal of putty): before you decide to put a decorative finish from putty on your walls, they can be leveled using gypsum plaster. Then it will be easier to replace the gyro with a new one, and not deal with the removal of the plaster layer. True, the price will be more expensive.
At this, the removal of the decorative coating from the walls ends. The walls are ready for your new fantasies: you can paint them, paste wallpaper or apply a new layer of plaster. The choice is yours.