How to treat the walls are not fungus. How to treat mold on the wall in the apartment - effective drugs

Tools designed to eliminate black stains on the wall are represented by a wide range of different solutions. The main thing is to know what to do to remove troubles and how to treat stains on the walls.

Black or blue growths have appeared in the room, the walls are peeling and crumbling - these are symptoms of the appearance in the house of an enemy of comfort and a lover of moist air - mold. To remove fungi, you will need to perform a whole range of work using industrial and folk remedies.

To successfully combat this trouble, you need to know what you have to "fight" with.

Fungus on the walls and the reasons for its formation

Mold fungi or mold penetrate into the substrate (nutrient medium), which is the surface of the walls or wooden parts building. In this case, there is a rapid growth of the mycelium (mycelium) and the formation of fruiting bodies of the fungus, located on the surface of the walls. Over time, not only upper layer plaster, but it also penetrates into the main wall material.

Mushrooms do not produce nutrients for mycelium, so it affects the entire surface in the room.

The main reasons for the formation of mycelium

As a rule, mushroom formations appear in case of malfunctions in ventilation and insufficient heating of the room:

  1. The main reason for the appearance of mold in the room is the high content of humidity in the air. This can occur during marriage in the work of builders
  • poor-quality work on laying foundation blocks;
  • gaps and large voids in the masonry;
  • Poorly carried out thermal insulation of the building leads to the formation of cold bridges.
  1. Malfunctions lead to the formation of mold ventilation system building. With clogged channels and closed vents, the exhaust air and vapors are not replaced, therefore, the humidity of the air increases.
  2. Installation plastic windows with low-quality fittings and the lack of a special device for ventilating the room - this is one of the reasons for the increase in moisture levels.
  3. A large number of indoor plants indoors, may contribute to the formation of black spots.
  4. In case of insufficient level of heating or its complete absence, in winter time freezing of the walls occurs, which will necessarily cause the development of mycelium in warm weather.

The development of microorganisms occurs on almost all materials in the building. In case of untimely processing, it may be necessary to remove not only the wallpaper, but also completely remove the layer of plaster or drywall. Mushrooms on wooden surfaces bring especially terrible consequences. For 1 year, the mycelium, growing, affects more than 70% of the entire furniture area.

Important. To prevent the development of mycelium and remove mold from the surface of the wall, it is not enough to know the causes of its occurrence. It is important to know the means of struggle and be able to use them.

Industrial and folk remedies for mold control

AT modern conditions, with a large number of counterfeit products on store shelves and advertising ineffective mold treatments, you can spend money and time and not get positive results from your work. Therefore, it is so important to know proven and effective antiseptics made in industrial conditions. But time-tested mold-fighting products can also help eliminate it.

Industrial means for combating mycelium

When buying, be sure to consult with the manager and study the instructions. Perhaps the dampener on the walls is designed to combat separate view mildew and will not suit you. In this case, it is better to buy universal remedy that kills all types of fungus. When purchasing a dry mix, do not forget to buy a dilution agent. Depending on the type of substance, it can dissolve in turpentine, white spirit and ordinary water. The most popular drugs are given in the following list. Here are only proven and high-quality antiseptics and fungicides:

  • Atlas Mycos. This material fights not only with fungus, but also with moss and lichen formed on the outer walls. Available in concentrated form. After dilution, according to the instructions, it is used to treat facades and any rooms with humid air and extensive mycelium colonies. Diluted with water according to the instructions. For the processing of minerals, a proportion of 1 to 5 is maintained, in all other cases, the ratio of substance and water is 1 to 2.
  • Spectrum Fungicide. This is universal material capable of removing mold from wooden surface. Works well on plaster and paint. The universal agent works with internal and external surfaces of walls with a high moisture content.
  • Xyolate. With the help of this drug, the molecular structure of the mycelium is destroyed. It is able to penetrate deep into the structure of walls or furniture. It is especially effective in advanced cases - it can kill deep mold.
  • Teflex. A very effective substance for fighting mold, while absolutely harmless to humans and animals. When processed, the walls are protected for a long time.
  • FILASMUFFY. This spray qualitatively removes fresh mycelium formations. Particularly effective for small stains on wallpaper, concrete or brick surfaces.
  • Snowball Impregnation. Effectively fights mold, moss, algae. Treat all types of indoor surfaces high humidity and outside the building.

Important. Any tool will reliably and efficiently remove mold from the walls, if the problem is detected and dealt with in a timely manner. When buying, be sure to check the certificate of the drug, beware of fakes.

And here are the recipes folk methods fight against fungus. Therefore, at an early stage of mycelium development, such processing will not only save money family budget, but reliably, qualitatively solve it.

Folk remedies for mold removal

These methods have been tested by the people, sometimes their use is much more effective than newfangled untested substances. Therefore, you need to know the recipe for preparing the ingredients of the mixture:

  1. For external treatment of the building and foundation from the appearance of fungi, surfaces are treated with creosote. It is better not to use such a tool inside the house because of its persistent, pungent smell.
  2. For processing internal walls and ceilings, several folk recipes are used that affect mold:
  • We breed 500 g blue vitriol in 10 liters of water. Continuing to stir, add 2 liters of vinegar essence. This solution can process wooden and other types of external and internal walls.
  • In 10 liters of water, 500 g of copper sulfate is diluted and 1500 g is added table salt. This solution also qualitatively fights mycelium.
  • We take 1400 ml of vinegar 6% in a bucket of water, add boric acid (400 g) and 900 g of borax. Stir and apply to affected areas.

For better impregnation of surfaces, before preparing solutions, it is better to warm up the water a little to 50 and then, with a roller or paint brush apply the solution to the fungus. Re-treatment with a large lesion of the wall is carried out after 30 days.

Good results are obtained by processing the walls with new ones. folk recipes. For this, solutions are used:

  • treatment of walls with hydrogen peroxide;
  • application to the affected surface, diluted to the state of liquid porridge, a solution of soda ash and water;
  • a solution of 9% vinegar with water;
  • a solution of the same amount of glycerin and alcohol;
  • treatment with a solution of bleach or alkali.

But in order not to look for an answer to the question - how to treat the walls from dampness and fungus, it is necessary to maintain normal temperature and indoor humidity levels. To do this, it is necessary to prevent the occurrence of a dew point in the wall, increasing the thermal insulation layer and ensuring normal room temperature, even in very coldy and at high positive temperatures.

The second way to solve the problem is to provide the room with a reliable and sufficient ventilation system. This reduces the level of humidity in the room, there is no possibility of condensation. If there is no ventilation, it must be carried out by equipping channels and an exhaust air exhaust system.

And when you solve these problems, fungal colonies will not be able to form in the room, coloring the walls black. The room will comfortable atmosphere and joy.

To select an efficient and effective way fight against moldy fungi, it is necessary to find out the main reason for their appearance. And they arise due to the following factors:

  • humid air in the room;
  • inadequate ventilation system;
  • wooden windows were replaced with plastic ones;
  • recent repairs made in violation of basic rules and technologies;
  • there is very little space between the walls of the room and the furniture, which does not allow air to circulate freely between them.

Mold on the walls

If the fungus has already become quite noticeable under the wallpaper, repairs should not be postponed, since their effect on the body is very serious consequences. The health hazard is a very serious reason for mandatory procedures on the treatment of wall surfaces before you start gluing wallpaper on them. Mold spores can spread through the air and be inhaled or inhaled. Because of this, such ailments can develop:

  • migraine;
  • cough;
  • severe intoxication of the body;
  • allergy;
  • fatigue;
  • exacerbated chronic diseases.

Old wallpaper on the wall, affected by mold, cannot be simply cleaned or washed, so wallpaper replacement is inevitable. No matter how beautiful the old wallpaper, it is necessary to get rid of them, as the mold impregnates them and makes them unsuitable for further use. But on their own, new wallpaper is not able to prevent the appearance of mold spots, which will appear even after repair. This is due to the fact that moldy fungi are not only on the surface of the wall, but also eat into its thickness. Therefore, for a thorough removal of mold, you will have to prepare well.

Mold on the wall in the apartment

In order to have everything you need at hand, you need to prepare gloves, a respirator, sandpaper, spatulas various sizes, disinfectant solution and mold remover. The first step is to remove the old wallpaper from the wall surface, after which you can see and evaluate the degree of mold damage. Areas with mold can be cleaned with a spatula, places with a loose structure are especially carefully treated. If the plaster has turned black, this layer must be removed completely before the appearance of light color not stained with mildew.

Mold wall treatment

After that sandpaper the affected areas are cleaned, which are not amenable to spatula cleaning. Then the surface of the walls can be treated with a special anti-mold solution, and for a good effect it is necessary to repeat this treatment up to five times in order to finally get rid of the stubborn mold. Between treatments, you need to leave the walls for 5-6 hours so that the solution can get well to the mold residues. Next, an antiseptic treatment is carried out, which also serves as a primer. Then you can start applying putty and sticking new wallpaper on finished surfaces walls.

What is suitable for wall processing

How can I treat the walls from fungus and mold before sticking wallpaper?

You can make a solution, for which you need to dissolve bleach with the calculation of 200 g per liter of water. In addition, you can use a fungicide solution, which is often found in special adhesives designed for wallpaper when pasting in a room with high humidity.

If the mold has spread to a layer of plaster, hydrogen peroxide is a good way to combat it, which helps to prevent further spread of mold spores. When working with this liquid, protect hands and exposed skin from peroxide. After careful treatment of the walls, they can be coated with a primer that contains an antiseptic. It will not only eliminate current mold fungi that may have remained after cleaning, but also prevent the emergence of new foci.

Also in a good way is the use of a solution of copper sulphate. It copes well with mold and eliminates all foci of the fungus. To prepare the liquid, you need to dissolve 100 g of copper sulfate in 10 liters of water. You can apply the solution to the surface of the walls with a brush or spray. After a good treatment, the liquid is able to penetrate deep into the walls and completely remove mold residues. It is important to know that the use of copper sulphate leaves traces on the wall, so it can be used in cases where wallpaper is to be replaced or walls are to be repainted.

Solution of copper sulphate

What is microwave method

This method is the newest and modern method removing mold in the house. It consists in the effect of microwave radiation on the fungus, which leads to the complete death of both the mold itself and its spores. The use of microwave waves makes it possible to achieve almost 100% efficiency in the fight against fungus. This is due to the properties of short waves to reach even the most remote areas that cannot be processed manually. Of all types of mold, microwave can successfully neutralize surface-type fungi, house and tree fungi, multi-colored mold and various types of rot.

Comparing everything available ways and methods, the advantage of treating walls with microwaves can be noted advantages, which are as follows:

  • security;
  • efficiency;
  • high speed;
  • the possibility of processing any surface;
  • waves reach a considerable depth of the walls.

However, the disadvantage is specialized equipment, which forces you to seek help from professional agencies. To purchase a device and independently carry out all the procedures, this requires a fairly substantial amount. However, this treatment will permanently eliminate mold in the house.

Mold can appear in absolutely any room, causing an unpleasant smell, allergies, various diseases etc. That is why it is important to know the causes of mold in apartments, as well as a few of the most effective ways fight against already formed and developed fungus.

Harm and types of mold

Often appears in our homes mold fungus, which can be of several types:


None of the known to us will resist the mold finishing materials. But in addition to harm, she also toxic to human body , especially for children. Depending on the level of mold spreading in the apartment, the symptoms can be different: first there is an effect on the respiratory system, and then on the whole organism as a whole. Testimony negative impact fungus becomes the appearance of cough, runny nose, lack of air, difficult to diagnose chronic diseases - all this is the reason for being in a damp room infected with mold.

Method number 15. Hydrogen peroxide + vinegar + boric acid

All of these components are able to cope with mold on highest level, and all together give a generally amazing effect. Water must be mixed with peroxide, vinegar and boric acid in a ratio of 4:2:2:1, and then spray on the surface or wipe it.

Method number 16. Get rid of for sure

Even if you have carried out the fight against mold in accordance with all the instructions, there is still no guarantee that it will not reappear. It is important not only to remove the fungus that has already appeared, but also to eliminate all possible reasons his reappearance. That is why you need:

  • securely insulate an apartment or house;
  • repair or replace the heating system;
  • for drying air;
  • to establish a ventilation system;
  • dry clothes not in the room, but on the balcony or purchase a washing machine with a drying function;
  • use a hood when cooking;
  • well ventilate all rooms;
  • fix leaking roofs, taps, etc.;
  • geraniums and violets are a great place for mold to grow, so their presence in the apartment should be limited;
  • the most risky places in terms of the appearance of mold regularly wipe, spray with anti-fungal agents.

How to remove the smell of mold?

Often, after removing the mold from the apartment and subsequent ventilation, the smell of rot still does not leave the room. You can fight it with means that absorb odors. So, on the place where the fungus used to be, you can pour soda, and after a few hours remove it with a vacuum cleaner: soda perfectly absorbs odors, so after such a procedure the smell will either disappear or become much weaker.

Can be used as an odor absorber charcoal: briquettes are simply placed around the room with an unpleasant odor, and after a while there will be no trace of it.

At the first sign of mold, you need to act immediately, because after 10-12 months it can get to

It turns out that mold colonies can settle on the concrete surface. This occurs in damp rooms, where a favorable climate is created for the growth of mold foci. Its harm to human health is known: inhalation of spores at their high concentration leads to poisoning of the body and provokes allergies.

However, concrete also suffers: fungi form microcracks on the surface, and toxic waste products affect the quality and integrity of the surface. To avoid such troubles, it is recommended to treat the structures with antiseptics after their installation and during operation.

Signs of infection and their prediction

  • Bathrooms and toilets;
  • Kitchens without hoods, especially in hostels and catering establishments without proper processing;
  • Rooms, the walls of which go to the upper ceiling (roof) or to the internal junctions of the walls, where the drainage of atmospheric precipitation is poorly organized;
  • Basements, often unheated;
  • Old and emergency houses, where the microclimate is disturbed and prevails high humidity, leaking walls, etc.

It is not always possible to notice the appearance of fungi right away - you never know where the focus is formed. How he presents himself:

  • The appearance of colored spots on wet foci;
  • Wallpaper and paint fall off, plaster crumbles;
  • After repair, a new lining quickly leaves;
  • There is a characteristic smell of rot.

The obvious smell of mold and black spots are the most dangerous signs of the manifestation of poisonous mushrooms for human health. Nevertheless, it is necessary to start elimination immediately after the detection of primary signs of infection. An antiseptic for concrete from mold will help in this.

The main types of antiseptics

Mold remedies are divided into groups:

  • Used for processing on concrete during the installation of structures;
  • For the treatment of existing lesions with the prevention of recurrence.

Means that are designed to prevent settlement will be ineffective in removing black and yellow spots, and antifungal drugs for treatment, it is not economically feasible to use for processing large areas during construction.

You can divide the drugs according to the place of application:

  • Means for surface impregnation, including deep penetration;
  • Surface treatments for fungus and mold are often incorporated into primers for walls, ceilings, and floors;
  • Additives-antiseptics introduced into the concrete solution during its mixing.

Antifungal agents have different compositions with different active ingredients and their concentration. The bases of the solutions also differ; they are often guided by when choosing a drug.

Water soluble products

Solutions of mineral salts water based they have the highest penetrating ability, but they also corrode metal reinforcement most intensively, therefore, steel and iron surfaces are not covered with water-soluble preparations.

The material has one drawback - the substance is washed out as easily as it is applied. For this reason, water-based anti-mold is added to concrete and plaster solutions as an additive - in this form, the product lasts much longer.

Products based on water and minerals are intended for internal use. They are suitable for treating ceilings, partitions and walls from fungus and preventing its occurrence in living rooms, including children's rooms.

Group representatives:

  • NORTEX-Doctor for concrete (treatment and prevention, price from 126 rubles / kg),
  • Opti-bio 1, 2.3 (prevention, price from 26 rubles / liter).

Means on organic solvents

Powerful and effective preparations against mold and fungus are suitable for treating concrete, brick, and stone walls. Unlike other products, organic solutions do not harm the reinforcement, and they stay on the surface for a longer time.

The advantage of the material is high efficiency- the product is capable of disinfecting even the most neglected form of mold in 1-2 applications. And this advantage covers a number of disadvantages:

  • The toxicity of the substance does not allow its use in residential premises;
  • On the concrete walls remain fat brown spots from the preparation, therefore, further finishing is impossible, only lining with hinged systems.

Antifungal on organic solvents suitable for application:

  • in garages;
  • In rooms for technical purposes;
  • In the cellars.

Effective Representatives:

  • Fongifluid Alpa (ALPA) about 280-300 rubles/kg;
  • Maviks Bio in combination with an organosilicon water repellent (570 rubles/kg);
  • Lacra Anti-mold for concrete (about 100 rubles / kg).

Combined drugs

Combined solutions are suitable for treating walls from mold indoors and outdoors. In addition, they form a waterproof film and have flame retardant properties.

Advantages of funds:

  • Odorless or non-toxic;
  • Suitable for wet areas;
  • Do not change the color and structure of the surface, you can make further finishing;
  • Deep penetration up to 8 centimeters;
  • Relatively low consumption - about 0.3 ... 0.5 liters per 1 square meter;
  • Retains properties up to 20 years.

Group representatives:

  • "Anti-mold" (a universal remedy for radically getting rid of fungal colonies, price - about 270 rubles / kg.);
  • Palette Macrosept (about 87 rubles / kg);
  • Dali (universal antiseptic, price from 125 rubles / kg).

How to make a choice

  • Scope of application of antiseptic preparations (external walls, internal premises);
  • The basis of the preparation (solutions in oil cannot be covered with a finish);
  • Time of use (treat existing colonies or prevent their appearance);
  • The service life of the drug.

How to treat walls in living rooms: water-based or combined antiseptics. They are non-toxic and odorless. There are products designed specifically for use in wet areas - bathrooms, pools and saunas.

Processing methods

It is necessary to work with drugs according to the instructions and observe the exposure time, proportions, and recommendations.

Pre-protection

The best option is to treat the surface of concrete structures before the appearance of fungi immediately after installation or at the first and each subsequent finish.

The solutions are brought to the required concentration (if necessary, diluted) and applied to the surface with rollers, the corners are worked out with a brush. It is important to soak every centimeter of the base. The best effect is achieved when treated with 2 layers of antiseptic.

combination

Some products are suitable for combination with primers or plasters or already included in their composition. In this case, it turns out to combine surface antiseptic and finishing steps. It is necessary to strictly observe the proportions of the preparation of solutions.

Security

Before starting work, it is necessary to protect yourself with respirators, gloves, it is recommended to use a polyethylene raincoat or work uniform, which then must be thoroughly washed at high temperature. These measures will help maintain health (getting spores on the mucous membranes and in the respiratory tract provokes poisoning and allergies), and cleaning clothes will prevent fungi from traveling to other rooms.

It is necessary to clean the surface to the maximum - remove growths and loose concrete, if it has already partially peeled off. Some products are applied directly to the colonies, read the instructions!

Naturally, mold is a rather unpleasant phenomenon for residents, since it not only spoils appearance premises, but it also proves to be extremely hazardous to health.

The spores of this "disease" in large quantities are in the air and enter the human body along with dust, thereby significantly increasing the risk of diseases such as asthma, allergies, dermatitis and others. should be carried out regularly.

Within the framework of an apartment, this phenomenon can affect the most various places, starting from walls and corners, and ending with mold on the walls of the balcony. In addition, the appearance of the fungus is possible even on washing machine and refrigerator, so the fight against this phenomenon is a paramount task for the owners of the affected housing.

The first sign of this problem is the distinct smell of dampness and the mold itself, this aroma can appear both in the old building and in the new building. also dangerous because bad smell spreads rapidly throughout the house, settling on personal belongings and household items, which can also cause a number of diseases.

It is noteworthy that the mold has many various kinds, each of which causes some harm to human health.

To date, there are several types of mold on the walls.

Type of moldCharacteristics
GreenThis type of mold is the most common, it quickly appears and with the same success you can get rid of it.
dark greenA more dangerous type of mold that needs to be eliminated for another early stages
White mold on the wallsThis species is very dangerous, because in a few moments it can spread to the entire territory of the dwelling, leaving its spores everywhere. You need to fight this mold immediately, while reducing the likelihood of touching yourself.
It is the most dangerous of all existing on this moment. An important point is that any contact with this species is very dangerous. To get rid of this mold, it is necessary to treat the infected area. chemicals and then completely ventilate the room. It is worth noting that this type of fungus spreads very quickly and is very difficult to exterminate and greatly threatens immune system person.

Therefore, before making a purchase of such a tool, it is better to get qualified advice. It is noteworthy that for each surface there is a tool that not only removes mold, but also prevents the further occurrence of this problem. modern world exist a large number of means of protection, each of which is distinguished by its uniqueness and effectiveness. Many people traditionally use solutions of chlorine and copper sulfate to combat this problem, but their main drawback is that after getting rid of one type of harmful bacteria, others may arise as a result of processing.

The most popular among consumers are products such as Valti Color and Valti Aqua Color, as well as Natura Antimantar, which cover the surface to be protected with a layer of film that excludes the possibility of recurrence of the fungus.

All of these products are very effective, but they are very strong irritants, so it is recommended to use rubber gloves and a respirator during their use.

Fighting fungus in the apartment

It should be noted right away that the sooner you start, the sooner you can get a positive result. Many people ask themselves: “How to deal with this unpleasant and dangerous phenomenon?”.

First of all, various solutions from mold come to mind, the purpose of which is to destroy plaque, but it is worth saying that if the cause itself is not eliminated, the effect of these drugs ends very quickly. If a fungus has appeared on the walls or furniture, then the first thing to do is to reduce the level of humidity in the problem room, and, if possible, dry it completely.

If the ventilation system is out of order, you must immediately contact the appropriate institution. To significantly reduce the likelihood of mold, it is necessary to use a plaster based on a cement-lime composition, which tolerates moisture well.

It is noteworthy that the solution of this plaster can be safely used in repair and construction work. Many people do not know what to do if the fungus spreads around the apartment at cosmic speed and settles everywhere and everywhere. The first thing to do is to get rid of the state of panic, as it will only interfere, then realize that the mold problem is very relevant and you need to deal with it at the initial stages.

Practical methods, as well as a list of tools and products suitable for use in cleaning acrylic bath are described.

It is noteworthy that many tenants cannot eliminate the fungus at the very beginning, as they notice its appearance only when the problem is firmly entrenched on the walls. Very often, mold appears in places that are inaccessible to the human eye, for example, in the area behind furniture, under wallpaper, under a layer of whitewash or paint.

The presence of mold can be noticed when the fungus is converted into small areas black and dark green on ceilings and walls. Therefore, experts recommend inspecting housing as often as possible, especially “risk zones” and corners.

  • ensure adequate ventilation of the premises;
  • reduce air humidity in a particular room;
  • during cleaning, look for signs of fungus and

Folk ways to get rid of fungus on the walls

It is worth noting that it is possible to clean the ceilings and walls from mold with the help of folk remedies. To date, the following methods of combating the fungus are known.

One of the more effective drugs is creosote, which should be applied directly to the damaged area. But it is worth remembering that this liquid is very poisonous and toxic, so its use must be carried out taking into account all safety rules.

The second remedy is ordinary glue diluted in water. With this mixture, you can fight green mold in the initial stages of its occurrence.

Recently, the following mixture has often been found: 2 liters of acetic acid and a pound of copper sulfate are dissolved in ten liters technical water. With the help of this composition, you can quickly and effectively treat the affected surface.

Many experts say that if you periodically wipe the area where mold forms with vinegar, you can achieve positive result in dealing with the described problem. It is noted that the pungent odor of the liquid disappears after a short time and the fungus is completely destroyed.

How to deal with mold at home, each person determines individually, depending on the rate of spread of the "disease" and the complexity preventive work. But, taking this step, one should not forget that often the fight against the fungus requires complex efforts and is not limited to the one-time use of a special agent.

Where to go if there is mold in the house


Today, there are a huge number of special companies providing mold control services. The services of such companies should be used if you decide on your own this problem is not possible.

Experienced specialists in the shortest possible time will be able to detect the source of the appearance of the fungus and destroy it, saving homeowners from this problem once and for all. The main task of such specialists is with the help of antiseptic drugs.

It is reported that through this process it is possible to long years forget about mold. While at home it is very difficult to achieve such results, and sometimes even impossible. This can be explained by the fact that not only experience and knowledge, but also high-tech equipment are needed to completely exterminate the source of the fungus.

There is no doubt that mold in the residential sector causes enormous damage, ranging from irreparable harm health, and ending with a damaged interior. In addition, if the basement turned out to be the source of the appearance of the fungus, then soon we can safely expect the process of decay with its characteristic unpleasant odor.

Given the properties of mold, we can say that this "disease" will spread as long as it is necessary to do overhaul. It is also worth noting that it is impossible to avoid contact with fungal spores, but it is quite possible to reduce their number to a minimum value. It has long been known that mold is most afraid of fresh air, therefore, in rooms with constant ventilation, it will not be able to multiply.

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