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What to do so that plastic windows do not sweat. What to do so that the windows do not cry folk remedies? Why wooden windows sweat

Many people often face such a problem as "sweating" windows. This applies to both plastic and wooden structures.

Often this is blamed on the manufacturer or the installers who carried out the installation. Yes, poor-quality production, as well as illiterate installation, take place, but this happens only in 3-5% of cases. Situations in which condensation forms on windows usually look like this:

    sweating throughout the winter cold;

    windows get wet in the morning;

    fogging of the window occurs only in some room, for example, in the kitchen.

The physics of this phenomenon is quite simple. Misting occurs when the room temperature is higher than the window temperature. And, if the temperature of the glass falls below the dew point, then the window becomes covered with condensate.

Humidity also plays an important role in the process. Accordingly, the conclusion is this: the greater the temperature difference between the room and the window itself, the stronger and more often condensation will form on the windows.

This is clearly seen in the table:

Thus, in principle, you can get rid of the problem in three ways:

  • lower indoor humidity
  • reduce the temperature in the room
  • increase the temperature of the inner surface of the window

The first method is carried out in the following ways:

  • with air dryer
  • airing the room

We will not consider the second method, since the room should have a temperature at which it will be comfortable for a person to be in it.

You can raise the window temperature:

  • installation of multi-chamber double-glazed windows
  • heated windows

Often faced with such a problem: old windows made back in the Soviet Union did not sweat, and after installing new plastic or wooden windows, condensate began to form almost instantly. The only thing is that, according to the old standards, the windows produced had a rather impressive distance between the inner and outer windows, much more than modern ones.

Accordingly, the inner window heated up more than the outer one, to which the heat did not reach, because, as you know, air is an excellent heat insulator. In addition, old window products often have many gaps between which air circulates. It is worth noting that modern windows with good ventilation should not sweat at all.

But still, what are the causes of fogging windows?

    single pane glass. If you have such a window, it is almost guaranteed to fog up in winter;

    poor ventilation in the room. This is especially true for the kitchen.

    a window sill installed directly above the battery prevents the air from circulating properly;

    there is no trunnion in the fittings to transfer windows to the so-called winter mode, or the owner does not know about the possibility of regulation. This is done within two minutes, it is enough just to move the pin to the desired position;

    plants in the room emit excess moisture;

    the room is poorly ventilated. This is especially true for kitchens;

    and finally, the same illiterate attitude that most owners sin on.

Solving the problem of fogging windows

    if the double-glazed window is single-chamber, the easiest way is to replace it. In this case, there is no need to change the entire window;

    clean ventilation. This procedure is not as complicated as it seems. It is quite enough to simply clean the air duct grilles;

    move the battery a little more distance or reduce the depth of the window sill. As an option - put a separate heater for the glass. But this is perhaps the most inconvenient solution;

    switch windows to the desired mode, most often winter. There is no need to call a specialist, the procedure is no more difficult than unscrewing or tightening a screw. After you do this, you will immediately notice how tightly the window has become pressed against the frame. This applies, of course, only to plastic windows;

    make a rule for yourself to ventilate the necessary rooms at least once every three days, and preferably daily;

    it may be worth inviting a specialist who will audit your home for heat leaks;

    If all this does not help, then, most likely, the matter is just in the wrong installation. If the guarantee for the windows is still valid, then from the moment of the application this ceases to be your problem. However, firms that value their reputation will do everything without a guarantee.

    Finally, the most effective way is to purchase an air dryer.

Reducing air humidity

Air dryers

In fact, dehumidifiers will serve well not only when windows are fogged up. If you began to notice the appearance of mold, feel bad, insects appear in a house or apartment, it is most likely that there is high humidity in the living room. In this case, even the usual drying of clothes can become a problem. In this case, you simply need a dehumidifier. By the way, the problem of high humidity often appears after repair.

These devices are of two types: electronic and mechanical. The latter work on special tablets and are a plastic container in which this very tablet is placed. It begins to absorb moisture from the air and release condensate into a special compartment below. A few pieces are enough to drain a small room.

Advantages of a mechanical device that absorbs moisture:

    does not require electricity to operate;

    does not emit foreign substances into the air;

    absolutely silent.

Minus, perhaps, only one, but very significant: the cost of the tablets is not small, and after stopping use, all the moisture will return back.

But in this case, there are electronic dehumidifiers. The principle of their operation is very similar to conventional air conditioners: the fan installed at the inlet captures the air and transfers it to the evaporator, then the dehumidified air is transferred to the heater, which brings it to room temperature and supplies it to the room. A characteristic of the device is a figure indicating the amount of moisture removed in 1 hour at room temperature. A good dehumidifier will remove 18-20 liters of water from the air per day.

The dehumidification function is also in some models of air conditioners. Whether or not your device works in this mode can be understood from the instructions or using the remote control by finding the appropriate designations on it (they can be very different, but the most common is “drop”).

Remember that high humidity in the apartment can lead not only to the formation of such a phenomenon as condensation, but also have an adverse effect on health and quality of life.

As soon as the cold comes, the windows begin to cry. And this problem becomes a headache for most housewives. How to deal with it? How can I get rid of condensation on the glass in order to forget about this weeping problem forever. We offer you some useful tips for caring for windows during the cold season, and ways to solve the problem of constantly misted windows.

Why do windows sweat?

Here is a list of reasons why windows sweat:

  • The difference between the temperature in the street and in the house;
  • Poor or broken ventilation in the room;
  • Bathrooms are not well ventilated;
  • Leaking plumbing;
  • If a gas stove is used to heat the apartment;
  • No kitchen hood;
  • Too many indoor plants (they release moisture that settles on the glass);
  • A wide window sill does not allow heat from the battery to pass through to the glass, so it fogs up;
  • No ceiling or floor insulation;
  • They did not have time to prepare wooden frames for the onset of cold weather;
  • Plastic windows not installed correctly;
  • There is a manufacturing defect of a double-glazed window;
  • Drying clothes in the apartment takes place in places not intended for this;
  • When installing a double-glazed window, the builders poorly sealed the cracks, so cold air enters the glass;
  • After installing plastic double-glazed windows, it is necessary to slightly open the window in winter mode, for natural ventilation.

How to wash windows so that they do not sweat?

If you have found the cause of condensation, then use this list of possible remedies to remove and prevent window fogging.

  • Any container for water (bucket, basin);
  • Soft, lint-free cloth;
  • Woolen rag;
  • Microfiber cloth;
  • Newspapers;
  • soap solution;
  • Glycerol;
  • Alcohol or alcohol-containing substances;
  • Shaving foam;
  • Anti-fog agents or other special means;
  • Scraper for windows with a rubber nozzle.

How to wash windows so that they do not sweat?

soap solution

Oily glass is becoming the most common problem that causes windows to fog up and retain moisture.

How to eliminate window fogging?

How to clean the glass from condensate and prevent its further fogging? For this you will need:

  • Wash the window with warm soapy water;
  • Wipe it with a clean, slightly damp, lint-free cloth;
  • Remove any remaining moisture with a scraper with a rubber nozzle;
  • Pour alcohol or vodka onto a sponge;
  • Wipe the entire glass with an alcohol sponge;
  • Leave to dry.

saline solution

To prevent the window from misting up, use a saline solution, namely, dissolve a tablespoon of salt in four liters of water. Wipe the glass with the resulting solution.

Attention! There may be white spots on the glass. Don't be scared! This means that the saline solution must be diluted with water and the window cleaning process must be started from the beginning. The advantage of a saline solution is that the salt prevents frost on the glass.

Glycerin and alcohol

Make a mixture of glycerin and alcohol in a ratio of 1:10. The alcohol will evaporate, the glycerin forms a protective film that will not allow water to settle on the glass. First, wash the window with warm water and dry it with a microfiber cloth. Apply the mixture to the glass with a cotton pad or swab. Leave it like this and don't rinse.

Should know! This method will protect against fogging and freezing of glasses from the inside.

Turpentine, potassium oil and glycerin

An effective recipe for a remedy for condensation on windows.

  • Clean the window with a damp cloth;
  • Mix 10 grams of glycerin with 20 grams of potassium oil and 2 grams of pine turpentine;
  • Apply the resulting paste to the glass with a cotton pad;
  • Polish the glass with a woolen cloth.

Newspaper

An easy way to keep windows from sweating. Use crumpled newspapers as a glass cleaner. Printing ink has a water-repellent effect. Thanks to him, the windows will not fog up for a long time.

Special funds

There are a huge number of chemicals to prevent fogging of glasses, these can be wipes, aerosols, special liquids. They contain surfactants. Apply any of the available products to the window, it will create an invisible film on the glass that will repel water and keep the glass perfectly visible and clean. They are very easy to use:

  • Remove moisture from the window;
  • Apply an aerosol (liquid) to the glass;
  • For best results, leave the product for a while;
  • Wipe the window dry.

What should be done to prevent sweating windows with wooden frames?

You should start to prevent window frames made of wood.

  • All existing gaps between the glass and the frame must be sealed with sealant (silicone) or other building materials;
  • For the best effect, glue the window joints with special paper tape or adhesive foam tape.
  • Before working with chemicals and other detergents, think about the safety of your hands, and use rubber gloves;
  • Also cover the window sill with a protective film or rags;
  • Read the instructions for use of chemicals and follow them strictly.

By following these tips, you will forget about the problem of condensation on the windows and all the inconveniences associated with them.

Video instruction: how to wash windows properly

Anti-fogging plastic windows

The modern world offers to replace the "old" wooden windows with the latest metal-plastic ones.

How to prevent fogging of plastic windows. How to treat plastic windows from fogging

The presence in the apartment of such windows, where there are plastic double-glazed windows, is justified. They are easy to care for, perfectly isolate the apartment from street sounds and retain heat well. They do not need to be painted, they do not rot or warp. And, with proper installation, they can delight their owners for many years. If the windows are made correctly and according to all the rules, then they are dry throughout the year. But it also happens that on some the smallest droplets of water from the side of the room are noticeable, that is, “windows fog up”. In this case, the fogging zone sometimes covers the entire lower part of each window glass, sometimes “rising” upwards by 2/3 of the glass area. This incident not only spoils the appearance, but is also a good environment for the development of a variety of mold. Yes, and excess dampness in living rooms is useless.

So why do plastic windows sweat?

They can sweat for several reasons:

  • Too humid air in the room, especially in winter;
  • A large pile of green plants on the windowsill;
  • The battery under the window is closed by any objects;
  • The channels for draining excess water in the double-glazed window are clogged;
  • Manufacturing defects.

And how to get rid of condensation on plastic windows?

What to do if double-glazed windows in the apartment fog up from the inside? To eliminate fogging, you need to know the physics of the phenomenon. In a simplified form, this means that the window itself has nothing to do with it! After all, no one, unfortunately, has canceled the dew point. Most likely, the apartment has high humidity and insulation is broken somewhere. Therefore, the glass of the window cools and the water condenses. To fix the problem, you probably need to put new rubber gaskets or improve ventilation.

Why do plastic windows sweat in winter? That's why they sweat, that with increased humidity on cold glasses inside the house, dew forms faster. Therefore, moisture in the air of living rooms should be no more than 47-54%. This corresponds to normal humidity for life. But what if this humidity inside the apartment is higher?

The ways to solve this problem are:

  • forced ventilation, as by ventilation through windows, for a quarter of an hour, every day, even in winter;
  • improve breathability by removing flowerpots and other items from the windowsill that block the path of warm air to the glass;
  • the “air dryer” device will help to eliminate the window panes that are heavily fogged from the inside of the room in the apartment;
  • reduction in the number of living plants standing in the room;
  • if the battery is blocked with some decorations, wooden shields, then all such decorative elements must be removed;
  • if the window sill is too wide, then it is necessary to install a ventilation unit in the window sill so that air begins to flow freely to the window;
  • remove curtains and blinds so that they do not block warm air from radiators or a convector;
  • if the house does not have a hood over the stove, then you need to put it and use it every time you cook.

And why do plastic windows sweat in autumn and spring?

The reason for this may be the contamination of window panes from inside the house. And to avoid this, it is necessary to make sure that, in addition to sufficient ventilation, the windows themselves are clean and dry.

Another reason for the appearance of water droplets may be clogged drainage in the windows themselves. Inside, each plastic window has a number of channels to drain water that accumulates inside it. Drainage channels are located at the bottom of the frame "from the street", and can be easily found if the sash is opened. To prevent condensation from accumulating on the windows in the apartment. It is necessary to monitor the patency of these channels, and from time to time clean or purge them from the dirt inside.

But if the glass from the inside of the double-glazed window is heavily covered with “dew” over almost the entire surface and this does not disappear with the onset of stable heat and bright sun that shines directly into the windows, then nothing can be done about it. The reason for this is a factory defect or it is poor-quality sealant materials for the glass itself. What to do? To eliminate this, a deep repair is necessary or all worthless double-glazed windows should be replaced. In any case, all this will only contribute to the destruction of the entire structure of the metal-plastic window.

Therefore, if your windows are “crying” and “sweating”, they can and should be helped! So, by following the above simple recommendations, you can either significantly reduce or completely remove glass fogging in metal-plastic windows.

Why do plastic windows sweat? This question can often be heard from owners of high-quality PVC windows. They are surprised by the incomprehensible appearance of liquid on the surface of the window, but this is ordinary condensate. In this article, we will try to convey to you what kind of phenomenon “condensation” is and how to resist it.

Most often, condensation on the surface of a double-glazed window occurs in certain situations. This can only happen in the morning. Approximately eight to ten o'clock. There are also cases when the windows fog up in the winter cold. There is also a situation when in all rooms there is no condensation on the windows, and in one it is constantly present. It is not uncommon for water to accumulate on the windowsill.

If the windows sweat, what does it look like?

There is such a tendency that most often PVC windows sweat in the direction from the bottom up with a slight accumulation at the edges. Misting looks like a huge amount of small-small droplets, which, connecting with each other, form large drops. Large drops formed on the surface of the glass flow down. Sometimes they can fall on the windowsill of a plastic window. This usually results in a small puddle of water forming on it.

What to do if your plastic windows sweat?

Most often, people who encounter such a problem complain to the company in which they purchased PVC windows. They believe that they were sold a low-quality product or mistakes were made during the installation of windows. The main argument is that this never happened with old windows. And to explain to the client that this is not the fault of the company is quite problematic. Although in fact, due to the fault of companies, this happens only from two to five percent of all cases. In all other cases, certain factors are most often to blame, and sometimes a combination of several of them provokes the occurrence of condensate.

Having figured out where the condensate comes from, we will understand why plastic windows sweat. Condensation is a liquid that appears on the surface of a plastic window. This process itself is the transformation of water and the state of vapor into a liquid state. The lower the temperature of the side of the double-glazed window that is in the room, the higher the likelihood of condensation on the surface of the glass becomes.

The level of humidity in the room can also cause the window to fog up.

In the science of physics there is such a thing as the dew point. Dew in the morning occurs due to the fact that the air around it warms up faster than the air that is near the grass and there comes a moment when the temperature near the grass reaches the so-called "dew point". It turns out that water vapor settles on the grass, and thus drops are formed. PVC windows sweat by the same nature.

The question often arises: why did the previous windows not fog up, but the new ones do? The reason is that the windows, installed back in the Soviet era, have a large gap between the panes that are in the frames. Due to this, the glass located on the side of the room has a temperature higher than the glass in a double-glazed window, especially a single-chamber one. But this does not mean that Soviet windows retained heat better. There are a number of reasons why plastic windows sweat. Below we will consider them and give practical advice on how to eliminate them.

The first reason is a single-chamber double-glazed window

When purchasing a plastic window, you should not try to save on it. Since the likelihood of condensation in a single-chamber double-glazed window is many times higher.

What to do with foggy windows (condensation on the glass)

In order to solve this problem, it must be replaced. Once again, note that not the entire window needs to be replaced, but only the double-glazed window.

The second reason is that the battery is blocked by the window sill

The battery, which is blocked by a window sill, disrupts the normal circulation of warm air. Therefore, the window is not heated properly. To eliminate this problem, you must either reduce the depth of the window sill, or remove the battery. The option of any alternative to the battery, which would heat the glass, is not excluded.

The third reason is poor ventilation of the room.

The ventilation grilles can become clogged with dust, which prevents them from sucking in moist air, and it remains in the room. To solve this problem, you need to clean or replace the grilles. If everything is in order with them, then it is worth seeing if the ventilation pipe itself is in order.

Flowers on windows can also cause windows to fog up, as they release liquid. This liquid settles on the surface of the glass, and as a result, condensation occurs. This problem is solved very simply - just remove the flowers from the windowsill.

The fourth reason is that your plastic windows are not switched to winter mode

In summer mode, the thermal insulation is lower than in winter mode. Therefore, the inner side of the plastic window glass is cooled more. Just switch the double-glazed window to winter or summer mode and the problem will disappear.

The fifth reason is that the room is ventilated for less than ten minutes a day.

Regardless of what kind of windows you have, the room must be ventilated. The micro-ventilation mode was created specifically for this, so use it.

Plastic windows located in the kitchen often fog up. The reason for this is that this room usually has the highest humidity. All because of the processes that take place in the kitchen. Therefore, we strongly advise you to give preference to a double-glazed window when choosing a double-glazed window for the kitchen.

Rarely, but it happens that plastic windows sweat due to errors that were made during installation. Then all the blame is on the company that did it and did it in bad faith. Such errors can be poor-quality installation of windows or improper installation of slopes. Because of this, blowing occurs, which lowers the temperature of the double-glazed window. As a result, the windows fog up. To solve this problem, it is necessary to eliminate the source of cold air.

In cold weather, condensation appears on some windows. On old wooden windows, this phenomenon is much less common than on new PVC windows. Sometimes fogging of plastic windows, or others, occurs after insulation and sealing of cracks. Sometimes windows start to fog up for no apparent reason.

Most often, this phenomenon manifests itself in a kitchen with a poor hood. The steam that comes from boiling during cooking settles and condenses on the cold surface of the glass. The manifestation of condensate inside the double-glazed window indicates its depressurization and the only way out is to replace it.

Causes of condensation on window panes

  1. Condensate - in fact, the transition of vapor to a liquid state at the transition of the "dew point". The main reason for the appearance of moisture on the glass of windows is the decrease in air outside and increased humidity in the room.
  2. The condition of ventilation has a significant influence on the appearance of condensate. With the onset of cold weather, many try to keep warm as much as possible and neglect even the elementary ventilation of the room.
  3. Often the appearance of a tear on the glass contributes to excessive sealing. But it also happens the other way around, when warm and humid air enters the gaps between the windows and collides with cold glass.
  4. In the apartment, there are a lot of sources for the evaporation of moisture. People themselves, exhaling air, increase the humidity of the air. There are also aquariums, flower pots, a bathroom and a kitchen.
  5. Heavy and thick curtains can interfere with ventilation and natural air circulation. Often, the replacement of heat sources affects the established microclimate in the house.

Fogging glass in wooden frames

  1. The old wooden windows rarely fogged up. This is due to traditional installation methods. In the window opening, under the standard frame, during installation, a drain sand cushion was provided, which leveled the moisture balance and provided a drain for condensate.
  2. After replacing old wooden windows with new ones, the drain is blocked and the windows start to fog up. Heating radiators are specially located under window openings. The heat coming from them not only warms the window panes, but also contributes to the general air circulation in the apartment.
  3. New large and wide window sills can prevent heat flow. Heat shields will help to overcome such trouble. They are easy to make even on your own. Narrow plates covered with silver foil are attached at an angle of 30° or 60° from the heat source to the window block on the windowsill.
  4. Improper operation and winterization errors can cause condensation. During the preparation of windows for the winter period, pay attention to the condition of the rubber seal. It must be elastic and glued evenly around the entire perimeter of the window frame.
  5. Periodically, the rubber seal requires treatment with an alcohol cleaner, make sure that the rubber does not dry out and does not lead to depressurization. It is unacceptable to get into the grooves of dirt and dust. If the rubber seal has become unusable, it is easy to replace it yourself.

Ways to combat fogging of plastic windows

  1. An old and proven way to put a thick decorative candle on the windowsill. These candles are designed to burn for several hours. The effect of burning a candle will appear immediately, the flame of a candle contributes to the active movement of air, although it emits little heat.
  2. At the same time, fix any leaking faucets, cover the aquarium, and do maintenance on exhaust systems. Remove flower pots from the windowsill. You can put a fan on the windowsill and direct the air flow to the window, and wipe the glass with a rag soaked in vinegar. Wipe at least once a week.
  3. There is also an old folk remedy for combating fogging of windows in an apartment. A solution is being prepared, which includes one part of medical glycerin per 20 parts of pure alcohol. A few drops of aromatic essential oil are added to the composition. It is recommended to wipe with such a mixture at least once every 15 days.
  4. Car dealerships sell a variety of chemical window defoggers. You can use them too. Such products are applied to a dry and clean glass surface. The effect of the use of such funds is short-lived, expensive and unsafe for health.
  5. If fogging of PVC windows occurs in the middle of a double-glazed window, then depressurization has occurred. It is impossible to fix the problem on your own. Closer to summer, it will evaporate itself, but with the onset of cold weather, it will appear again. Masters, of course, can try to restore the seal, but most likely, they will have to replace the double-glazed window. Best of all behave double-glazed windows. Now PVC windows with two modes have appeared - summer and winter, you just need to remember in time to switch modes according to seasons.
  6. Often, the cause of fogging of plastic windows is errors during installation, installation and design. Incorrect slopes or a skew invisible to the naked eye can contribute to improper heat transfer and cause condensed moisture to appear on and inside the double-glazed window of a plastic window. Remember that regular airing of the room, at least twice a day, will help in the fight against fogging of window panes.

With the advent of cold weather, people often encounter such a problem as misting windows. What can I do to get rid of condensation on windows? Below you can find out how to fix this problem without much effort. We will answer the question of how to wash windows from fogging. Proper washing will help remove unwanted moisture and make your home feel light and clean.

Method one

How to remove condensation from the glass so that it no longer accumulates? First, wash the glass with soapy water and remove moisture with a special scraper. Take a sponge, moisten it with alcohol or vodka, wipe the glass with it. Once the alcohol has dried, moisture should no longer collect on the glass surface.

Method two

Windows can also be washed with saline. To do this, dissolve a tablespoon of salt in 4 liters of warm water. Filter the water to prevent salt grains from scratching the glass. Another benefit of this method is to prevent the glass from freezing.

Method three

First of all, you need to wash the windows with warm water and remove excess moisture with a microfiber cloth. Then prepare a solution of glycerin and alcohol. Mix these two ingredients in a ratio of 1:10 respectively. Soak a cloth in the resulting mixture and apply to the glass. With this method, you can get rid of icing and fogging of glass from the inside.

Method four

The first step is to clean the glass. Then polish with a special paste-like mixture. Prepare it by mixing 10 g of glycerin and 20 g of potassium oil with 2 g of pine turpentine.

Method five

After washing, polish the windows with a crumpled newspaper. Printing ink has a water-repellent property, so the windows will not fog up.

Method six

In stores, you can buy a special liquid in the form of an aerosol. Such substances contain weak acids and active substances that have the property of repelling moisture from the glass surface. Spray the glass with a spray, wait until the product is absorbed and remove the residue with a napkin.

What to do to prevent wooden windows from sweating?

To prevent wooden windows from sweating, they must first be insulated with adhesive tape and tapes. Seal the gaps between glass and wood with sealants.

A few tips:

Protect your hands with gloves while working.

Cover the surface of the window sill with a film or rags.

Before using various chemicals, carefully read the instructions.

Fogging of plastic windows: causes and remedies.

Plastic windows are very well adapted to any climatic conditions. It is also worth noting that they do not require special care and do not need painting, which greatly facilitates their operation.

But, unfortunately, like any thing, plastic windows have their drawbacks. The main thing, perhaps, can be called their periodic fogging. It is about this problem that we will talk today, and also try to find ways to solve it.

Why sweat, cry plastic windows in an apartment and a private house?

It will not be news to anyone that everyone wants to equip their home as best as possible. The interior decoration of the apartment and house, the choice of interior - all this is necessary and important. But you must admit that not only these things determine how comfortable and cozy you will be in your own home.

Today, the issue of choosing windows is also relevant. Over the past few years, plastic windows have taken a leading position among all other types. Such windows are in great demand, as well as popularity, and it is well deserved.

Thanks to a number of advantages of plastic windows, more and more people are opting for them, throwing away their old wooden frames without any hesitation. What are the benefits?

For those who don't know yet, we'll tell you. Firstly, this is an excellent tightness, thanks to which the heat in the house will be preserved as much as possible, and extraneous sounds will not disturb. Secondly, it is their durability.

To begin with, I would like to make it clear that fogging is the appearance of water directly on the surface of the window. It is this formed water that is called condensate. Reasons why windows sweat both in an apartment and in a private house, regardless of what it is built from, there is a huge variety.

Let's look at the main ones:

  • Poor assembly and installation. There is an opinion among people that this is the very first and most common cause of weeping windows. But as much as you would like to believe it, it is not. Yes, this happens. And most often this happens due to the inexperience of the master or low-quality components, but, unfortunately, no one is immune from this. To reduce your chances of getting into a similar situation, take the choice of a master, and the windows themselves, with all seriousness.
  • The most common cause of misted windows is lack of good ventilation in an apartment and a house. In order to fix this problem, you need to take some time for your ventilation grilles and clean them if necessary.
  • Do you believe that your loved ones houseplants standing on the windowsill, can provoke such inconvenience? If not, it's very useless. Due to the fact that some plants emit too much moisture, the plastic window can easily fog up.
  • Lack of ventilation. Remember that any room, room, whether in an apartment or in a private house, must be ventilated without fail. By the way, this can not only help get rid of foggy windows, but it will also be good for your health.
  • A fairly common cause of weeping windows is the location of the window sill directly above the battery. Due to this arrangement of the window sill, air circulation in the room is disturbed, a temperature difference appears, which leads directly to the formation of water droplets on the window.


In principle, windows fog up, both in the apartment and in the house for the same reasons. It is worth noting, perhaps, only a few factors:

  • In private houses windows "cry", as a rule, due to the lack of a constant supply of fresh air. That is due to poor ventilation. If in new private houses there is at least some kind of ventilation system, for example, in the toilet or in the kitchen, then in old houses everything is limited to the door. It is because of this that we get both dampness, and mold, and drops on the window.
  • On the balcony, in principle, as in the whole apartment, repairs, both ongoing and already completed, can easily become a possible cause of “weeping” windows. This happens because the same newly laid tiles or freshly glued wallpaper emit a lot of moisture, which can settle on the window.
  • in winter plastic windows sweat much more often. The reason may be that your window is equipped with a thin double-glazed window. Such a double-glazed window does not cope in the required volume with the task of energy saving, and therefore it will regularly fog up.
  • Also, the reason that the windows “cry” in winter may be that it is already cold and sub-zero outside, and your windows are still working in summer mode.

Why do plastic windows sweat a lot in winter from inside the room and outside, condensate inside the double-glazed window?

Earlier we mentioned that in winter the windows “weep” much more often and fogging occurs not only from inside the room, but also from the outside, and sometimes even inside the window. What can be the cause of these phenomena? Now we will try to figure it out.

  • We will immediately reassure you - there is nothing wrong with the fact that the windows fog up from the outside. You can even say the opposite. It happens because abrupt change in temperature. The resulting condensate is absolutely harmless to your home, if there are installed ebbs. If the tides are not made, then the condensate can easily drain into the wall, which you naturally do not need. If you see that the window is “crying” from the outside, be sure that the double-glazed windows are selected and installed correctly.
  • O causes of fogging windows from the inside we've already talked. It should only be said that properly selected and installed windows, as well as maintaining the right humidity in the house or apartment, will help you not to face this problem.


  • Sometimes fogging occurs not outside, but inside the double-glazed window. If your window began to “cry” in this way, know that the problem is in violation of the sealing of the double-glazed window. And this, in turn, only says that: either the product itself is of poor quality, or an inexperienced master installed it for you and made a mistake.
  • Misting window inside indicates that the window, in principle, cannot properly perform its direct functions - thermal insulation and noise insulation. Therefore, such a double-glazed window needs to be replaced. By the way, if such a case is specified in the contract as a guarantee, then the double-glazed window should be replaced for free, and if not, then you will do the replacement for your own money. That is why we recommend paying special attention to these points.

It is very important to correctly determine the cause of fogging windows, because the method of solving the problem depends on this.

"Weeping" windows in the apartment and house: how to solve the problem?

There is enough a large number of methods for eliminating "weeping" windows. So, let's talk about the most effective and common:

  • If you are aware of high humidity in your apartment or house, make it a rule to ventilate the room daily. It is also necessary to remove all indoor plants directly from the windowsill, because they emit moisture, which then in the form of condensate will settle on the window.
  • Ensure the room is well ventilated.
  • If your window can work in two modes, then do not forget to use this function. Accordingly, in winter your window should not be in summer mode, and in summer - in winter.
  • Do not save on buying windows, remember - the miser pays twice. Since you have decided to replace old windows with plastic ones, choose the highest quality ones. Properly selected and installed windows will serve you for many, many years.


  • In the absence of a hood in the kitchen, it would be nice to purchase one. And use regularly while cooking.
  • If possible, windows should be kept on the "ventilation" mode. This will ensure a constant flow of air.
  • Do not forget that over time, all things break or wear out. Therefore, it will not be superfluous from time to time to check the integrity of the fittings, and, if necessary, to replace components.

How to process plastic windows so as not to sweat?

Another option to eliminate "weeping" windows is their regular processing.

  • Of course, if there is an opportunity and a need (in case the windows sweat a lot), buy special products that are designed directly to eliminate condensation on the windows. Such products, when applied to windows, create an invisible film that helps repel water. You can buy them in good household chemical stores, and you can also order them in the store where you purchased the windows. Be sure to read the instructions carefully before use.
  • No less effective is window treatment with saline solution. To do this, you need to dissolve a tablespoon of salt (without a slide) in 5 liters of water. Filter the solution, thereby removing the crystals of undissolved salt. Then wipe the window with the already prepared solution. If after this procedure streaks or white marks remain on the window, dilute the solution with a little water, and repeat wiping again.


  • You can also use soap solution. Take some water and add a little bit of any detergent there. Soak a microfiber cloth in the resulting solution, wring it out well and wipe the window. Then rinse the window well with clean water and dry with a dry microfiber cloth.
  • A solution of water and alcohol. It is recommended to use such a tool when the room is cold enough. Alcohol needs to be added quite a bit. Such a solution is quite easily applied to glass, while creating a good protection against moisture.

Now we propose to move on to folk remedies for eliminating "weeping" windows. Agree, we all quite often resort to similar methods of solving problems, so why not use these tips in this situation as well?

So that the windows do not sweat, what needs to be done: folk remedies

So, let's begin.

  • Condensate elimination method using decorative candles. To do this, you need to purchase several decorative candles, preferably large ones, light them, and place a foggy window on the windowsill. People's advisers assure that in the process of burning candles, the heat generated will normalize air circulation, thereby eliminating condensate.
  • The use of a well-known tool "Second". The liquid must be sprayed onto the problematic window, and then wiped dry with newspapers. It is necessary to pay attention to the fact that the liquid should be distributed evenly over the entire glass, otherwise there will be no effect in places where it is absent. Newspapers must be new and clean.
  • Fans. This method also aims to normalize the air flow. The fan must be directed to the “weeping” window and after 10-20 minutes the problem will be fixed.


  • Window chafing mixture of glycerin and alcohol. To begin with, remember that the ratio of these components must be strictly 1:10. How it works? Everyone is well aware that alcohol is very easily and quickly weathered. So, having applied such a solution to the glass, the alcohol will quickly disappear, but glycerin forms a thin film that will prevent water from settling on the glass. So, to begin with, wash the windows well with warm water, wipe with a window cloth. A microfiber cloth is a good option. Spread the mixture evenly on the glass and leave it on without rinsing.

So, today we touched on a topic that interests a huge number of people - the purchase, as well as the installation of plastic windows, and the problem of their fogging. From the foregoing, it is not difficult to understand that there are a lot of reasons for this unpleasant phenomenon, and in short, it is either the wrong installation of the window by the master, and excessive savings, as well as the choice of low-quality products, or high humidity, lack of good ventilation and improper operation of the window.

In order to avoid such unpleasant moments of using popular plastic windows, we recommend that you follow the tips that we have repeatedly described today, in particular, observe the temperature regime and control the humidity in the room, as well as regularly ventilate. Compliance with all these tips and respect for the windows will provide you with a comfortable stay in your house or apartment.

Video: Why do plastic windows sweat?

Any windows in the house, whether modern plastic or “Soviet” wooden, installed in a room, kitchen, balcony or loggia, under certain conditions become covered with condensate (mist). It is a mistake to think that drops of water flowing down glass are harmless. If condensation is found on the windows, you must immediately look for and fix the problem, otherwise the consequences will be disastrous.

The physical essence of the process. Water drips on glass do not appear for no reason. To understand why windows fog up, let's remember the basics of physics. Air saturated with water vapor is not able to retain moisture, especially at low temperatures (less than +20°C). As a result, excess moisture condenses on the most chilled surface, which most often in a residential area is wooden or plastic windows, since one part of the glass is outside, the other is inside.



Moment of occurrence of the dew point

Effects. Firstly, the microclimate in the room is disturbed: (and for a comfortable stay, the humidity should be in the range of 40-60%), which does not affect the health of the household for the better.

Secondly, excess water is favorable conditions for the development of mold and other microorganisms that affect wallpaper, tiles, carpets, upholstered furniture, textiles, and food. And finally, moisture collects in the crevices of the window sill and frames, reducing the life of the window structure.

Causes of fogging windows in the house

1. Poor air circulation: thick curtains or solid screens covering heating radiators, a wide window sill that prevents the normal movement of warm air and window heating. As a result, condensation collects on the windows.



A wide window sill is not always good

2. Insufficient ventilation of the room: tightly closed windows, non-functioning ventilation shaft, lack of exhaust and deflectors.

3. Violation of the temperature regime: turning off the heating (for example, during repairs), insufficient heating of the room.

4. Errors when installing windows: poor-quality sealing or finishing of slopes, complete construction with non-working fittings.



An incorrectly installed window shows up as condensation on the glass in winter

5. The presence of sources of high humidity: indoor plants and marshy soil in pots, aquariums, clothes hung out for drying, pipe leaks, plumbing, balcony roofs, loggia walls.

Ways to get rid of condensation on misted windows

1. Move houseplants from window sills to shelves, replace thick curtains, blinds or roller blinds with light curtains.

2. Replace wide window sills with narrower ones or install special convection grilles.

3. If plastic windows (PVC) fog up, be sure to switch the structure to the “winter” mode during the cold season (modern double-glazed windows have such a function).



Mode change on plastic windows

4. During cooking, use the hood, check the ventilation in the kitchen, bathroom and toilet. A good hood almost guarantees the absence of condensation on the windows from the side of the room (inside the apartment).

5. Eliminate leaks and "unauthorized" accumulation of water.

6. Buy additional heaters for large and poorly heated rooms.

7. Insulate the slopes on the windows and balcony sections, seal the joints and cracks, if any, with a sealant (for example, mounting foam).



Warming and careful sealing of joints solve the problem of condensate on the balcony

8. Check window hardware, install new handles and latches if necessary. If you only plan to change old wooden windows to plastic ones, choose double-glazed windows.

9. Misted windows on the balcony are eliminated by natural ventilation and heating. If possible, insulate the balcony inside and out.

10. Do not forget to ventilate all rooms in the apartment or house every day (including balconies and loggias) for at least half an hour.

It's a paradox, but wooden (especially old) windows fog up much less often than their modern counterparts. The thing is that cracked wood, unlike perfectly fitted plastic frames and slopes, passes air well.

Folk methods to get rid of condensation on windows

The proposed remedies can be used as a temporary solution to the problem until the root cause of fogging windows is eliminated, when it takes a long time (several days, and sometimes even weeks).

1. Wipe the glasses at least a couple of times a month with rubbing alcohol supplemented with glycerin (20:1 ratio).

2. "Draw" a fine grid on the glass with dry soap. Buff to a shine with a clean, dry cloth (preferably cotton or microfiber).

3. In the space between the frames, put a homemade rag bag filled with table salt (you can put a saucer). Kitchen salt perfectly absorbs excess moisture.



Salt absorbs excess moisture - the best temporary solution

4. If the window is foggy from the inside, a lit decorative candle installed on the windowsill will help. Make sure that there are no flammable objects and substances nearby!