How to rub the window so as not to sweat. What to do if the windows in the apartment sweat

Misted windows are the scourge of many residents of houses and apartments. This problem is especially acute in winter, autumn and spring, even with normal room heating. You can fix this problem by constantly wiping the glass or ventilating the room. As you know, such solutions are often tedious and time-consuming, and besides, they are not always effective. In turn, comprehensive actions tend to cost more, but in exchange they help get rid of the problem forever. If the plastic windows inside sweat a lot, the fight against steam condensation should begin by determining the causes of this phenomenon. What to do so that the windows do not sweat and are there any effective ways to prevent this? Let's look at everything in order, and you choose what suits you best.

Ventilation in the room is very important so that the windows do not sweat.

If the windows sweat, the most common cause of this phenomenon is the increased humidity in the room. To prevent the windows from getting covered in steam, you must first of all take care of ventilation. Currently available designs are characterized by a high degree of tightness. This is not a disadvantage, because sealed double-glazed windows can save a lot on heating your house or apartment. We often think that the steam that appears on the glasses is the result of structural defects or errors during their installation and assembly. In fact, the phenomenon of condensation on windows appears even in the case of sufficiently well-functioning and correctly installed double-glazed windows. Another question is why windows inside a double-glazed window sweat, there is a high probability of installation defects.

In order to assess their condition, it is worth determining in which particular places moisture accumulates the most. If this is the inner surface of a double-glazed window, the fault lies with us. Perhaps we forget to turn on the hood during cooking, or we dry too many clothes at the same time and avoid airing. In contrast, the steam coating of the glass on the outside is generally dictated by weather conditions and the location of the building. This phenomenon is observed especially often when the house is located close to the water, or when there is a lot of vegetation right outside the window that collects moisture from the air.

Situations that may be the basis for filing a claim against a window manufacturer or installer primarily include:

the plastic window inside the glazing is sweating (why the plastic window inside is sweating can be answered by the master, it is probably a structural defect if it sweats between the windows);
local presence of wet spots (probable assembly defect).

It should be noted that the presence of a sealed double-glazed window inherently requires the proper functioning of the ventilation system of the building, namely the need to remove excess moisture from the rooms and the flow of fresh air from outside. The correct climate in residential premises suggests that rooms should be provided with 30 to 50 cubic meters of fresh air per hour. And in kitchens and bathrooms, that is, rooms with a high level of humidity - 70 m³.

When the temperature outside the window drops, and in the rooms we raise the temperature by heating, the glasses can react with so-called fogging, or the formation of steam drops on them. The phenomenon can occur more often when it is very damp outside, windows often sweat in the rain and as a result of our normal household procedures, for example, cooking, drying clothes in the apartment, taking a bath, etc. In some cases, traditional ventilation power may not be enough.

If the windows sweat a lot, what should I do? Ventilate the apartment

Frequent opening of the window and ventilation of the premises eliminates the problem if double-glazed windows sweat. This is not an expensive procedure, accessible to everyone. The problem, however, is that in autumn or winter the weather does not allow you to ventilate the apartment often. Frequent ventilation, especially in cold weather, can cause large heat losses and therefore contribute to higher energy bills for heating. What can be done to prevent plastic windows from sweating in high humidity? Of course, ventilation is necessary, but requires compliance with specific rules.

Window diffuser can effectively improve ventilation

As mentioned above, the tightness of modern window products cannot be interpreted as their drawback. But when conventional ventilation in a building fails to get rid of pvc windows sweating, the efficiency of the ventilation system can be improved by equipping double-glazed windows with a ventilation function, or by installing diffusers. Ventilation is carried out by setting the handle in a certain position.

Micro-ventilation is a great way to keep windows from sweating. The advantage of diffusers is that you can decide on them at any time during the installation of a double-glazed window. These devices allow ventilation without the need to open the doors wide open. Due to the location of the ventilation holes in the upper part of the double-glazed window, the incoming cold air is mixed with the heated air inside the room under the ceiling. Before it drops to the level that we perceive, it will receive room temperature, which is acceptable and comfortable for a person.

What can be done so that the windows do not sweat, folk remedies

The solutions suggested above are effective and most rational, and work great. Nevertheless, many residents of houses and apartments are trying to apply, if the windows in the house are sweating, folk remedies. What are these means?

Home and folk remedies to keep the windows in the house from sweating:

Installation of fans in the ventilation openings in the apartment (these devices, however, must run constantly or at least most of the day, which unfortunately creates costs associated with energy consumption).
Installing dehumidifiers on or near window sills (purchasing a small dehumidifier will not incur significant financial costs, but it is not clear whether they will be enough power to reduce indoor humidity).
Switching on the hood during cooking (a normal hood can remove a significant amount of steam generated during cooking).
Often the question is, how to wipe the windows so as not to sweat? It is possible to use special preparations that are designed to eliminate the formation of condensation on the glass (but if the windows in the house sweat a lot, such products usually do not work).
Limitation of household activities during which the level of humidity in the room increases (short baths and immediate airing of the bathroom after this operation, drying clothes on the balcony and outside in well-ventilated places, etc.).
Some folk methods are to wipe the glass with special solutions. It could be:
- a solution of salt (a tablespoon per three-liter bottle);

What to do if plastic windows sweat?

Do you have plastic windows installed in your home or are you just planning such glazing? PVC profiles are strong, durable, unpretentious in maintenance, they will save the maximum amount of heat indoors, help avoid drafts, and protect against annoying street noise.

Many people who have chosen double-glazed windows over traditional wooden frames are concerned about the question: why does moisture accumulate on them? Is this a natural phenomenon or a sign of poor-quality work of the company installing the structure? In the framework of this article, we will try to figure out why this happens and what to do so that the windows do not sweat.

Window cooling principle and dew point

Why do windows sweat? If you have chosen the double-glazed window correctly and the whole structure is installed correctly, this does not happen. Let's figure out how and why condensation occurs.

The reason for the release of condensate is the drop in the temperature of the double-glazed window below the "dew point", when water vapor becomes saturated and its excess manifests itself in the form of precipitation. It directly depends on the temperature in the room. The colder it is, the sooner the double-glazed window will “cry”. This phenomenon is unavoidable if the temperature of the profile, window slope and internal glass reach temperatures below 12°C.

How does this happen? The double-glazed window fogs up from the bottom up. At first, drops are virtually invisible and rarely form at the edges. Over time, becoming heavier, they roll down to the windowsill, forming streams of moisture. Seeing puddles in the window sill space, many people “sound the alarm” and complain to the company that installed the pvc structure.

Most of them are confident: this is the fault of unscrupulous contractors or a manufacturing defect. We hasten to refute this stereotype: the vast majority of cases of moisture formation are associated with completely different reasons.

Plastic windows sweat: what to do to eliminate the inconvenience?

Do not rush to panic: in most cases, the accumulation of condensate can be prevented on your own. The main thing is to correctly determine the reason why double-glazed windows sweat and take appropriate measures. Possible root causes of the problem:

Under the window sill is a battery that overlaps it. For normal oxygen circulation, uniform blowing of the window with warm air is important; it was blown with heat. If this does not happen, the glass is covered with drops of moisture. We advise you to reduce the size of the window sill, make ventilation holes in it, move the heating radiator or find another option for heating the window.
The window sill is heavily crowded with indoor plants. They decorate the apartment, but increase the humidity of oxygen. Reduce their number and see if the situation improves.
Lack of proper ventilation. Its main task is to remove moist air from the room. If the ventilation system is unstable or malfunctioning, fogging cannot be avoided. Check the ventilation grilles for debris and dust accumulation. Regular cleaning and cleaning will ensure their stable operation.
The ventilation mode is broken. If the room is ventilated for less than 10 minutes during the day, metal-plastic windows sweat. Make it a rule to regularly provide fresh air inside the home and forget about the problem.
The fittings in the window were not switched to winter mode. In this case, there is a temperature difference, provoking abundant condensate.
Gross errors of installers. Failure to comply with the correct installation conditions, unsuccessful slopes - provoke blowing, which strongly cools one side of the double-glazed window, on which moisture accumulates. This cause of discomfort is much more difficult to eliminate and virtually impossible on your own.

You need to know: single-chamber structures made without energy-saving technology will fog up in the cold season. To avoid inconvenience - do not skimp on high-quality two- or three-chamber double-glazed windows.

Sometimes excess moisture on the window occurs only in one room of the apartment or house. Perhaps the room is constantly drying wet clothes, a large number of people live, or the curtains are too heavy and thick! Heavy fabric interferes with normal air circulation and contributes to fogging.

Moisture often forms on kitchen glasses, because they are constantly fried, baked, boiled there. Install a high-quality hood: the climate in the room returns to normal and the window will stop “crying”.

Sweating windows in the house: how to prevent a problem

Be aware that the installation of double-glazed windows changes the microclimate inside the room, especially damp and cold. It is better not to wait for moisture to accumulate on the windowsills, to take preventive measures. For starters, check how the ventilation works. The presence of traction is checked elementarily: take a lighter or a candle. Keep an eye on the light: if it is even and does not deviate, the ventilation system is clearly clogged.

The worst option is if the room is not sufficiently ventilated and poorly heated. The temperature of the released moisture approaches the air temperature. There is an unpleasant smell, dampness, mold and fungus on the walls. As a result, it is impossible to live in a room normally and stay for a long time. Knowing about such features of it, there is only one option for prevention - the maximum insulation of the wall from the outside. Such a precautionary measure slightly, but increases the temperature inside the building and the pvc profile. Over time, the design will sweat less and less.

When carrying out insulation work, choose high-quality energy-saving materials. Pay special attention to the following areas:

window sill space;
the outer part of the wall near the window;
slopes.

Be sure to remember: it is absolutely impossible to lay out slopes on your own! It is important to invite a qualified craftsman to perform the work and choose high-quality drywall with the best thermal insulation performance.

It is strongly not recommended to replace it with ordinary plaster mortar! This is not only ineffective and increases the level of moisture in the air, but also dangerous: over time, a piece of plaster may break off. Properly carried out insulation is a guarantee that condensation does not form.

As part of the article, we described in detail why plastic windows sweat and what to do. Here are a few more recommendations that reduce the likelihood of condensation in the cold season.

Constantly monitor the indoor temperature in late autumn and winter: it should not fall below +18°C.
Measure the humidity in the building using a special thermometer-hygrometer. The optimal indicator is 60% at a temperature of + 20 ° C.
Try to find sources of dampness. Often the reason lies in the leakage of the roof, the stagnation of water in the basement or underground.
Use a vertical ventilation or climate control system.
If the radiator is located under a massive window sill, install a convection damper into the wall.

We hope our tips have helped in solving the problem of excessive moisture. Read other posts on our blog and share articles you like.

Do you want your windows to be minimally sweaty? Order windows from time-tested profile systems, such as those presented on our website.

After fresh glazing of the apartment, the owners suddenly discover that drops of water are accumulating on the frame or window sill. The problem is common, it can arise initially or appear during operation. Let's find out why plastic windows sweat from the inside, and most importantly - how to deal with it?

Causes of fogging plastic windows

High indoor humidity

It is worth remembering the school physics course, which tells about the nature of the condensation process. Water changes from a gaseous state to a liquid state by simply lowering the temperature. Window panes are cooler than walls, ceiling or floor - this is the "weakest link" on which drops of condensed moisture form in the first place. Naturally, this happens only if the room has high humidity.

Why didn't this problem exist before, with old windows? Everything is simple! The old cracked frames were the cause of constant drafts. This is inconvenient in everyday life, but it provides regular ventilation of the room, which occurs as if by itself. After the installation of sealed plastic structures, the flow of air from the outside became impossible. In the dry and warm seasons, this is unimportant, but it is worth increasing the humidity in the apartment (especially with the onset of cold weather) - and condensation will begin to settle on the windows.

What causes an increase in humidity?

Cooking food (boiling water in a kettle or saucepan).
Drying clothes in the room (on batteries or special designs).
An abundance of flowers that require regular watering.

There can be many more reasons, the main thing is to find the source of excessive moisture in the air and, if possible, eliminate it. For example, check and tidy the hood in the kitchen and bathroom. Remove flower pots with damp earth from the windowsills. Hang washed clothes outside the apartment. Remove aquariums and decorative fountains, etc. from windows.

Please note that it is normal for windows to fog up during repairs. Many building materials intensively absorb moisture, and then give it out. If rolls of wallpaper or wooden structures are stored in the room, the walls are treated with a primer or covered with water-based paint, the appearance of condensation is understandable. The double-glazed window will return to normal after the completion of construction work.

Manufacturing defect or incorrect installation

Windows inevitably get wet with initially broken tightness (often owners of single-glazed windows have to deal with this, double-glazed windows are more reliable in this regard). It is also necessary to take into account possible defects in fittings - “congenital” or acquired during operation:

faulty latches that do not provide a snug fit of the frames when closed;
worn rubber seals that are laid around the perimeter for greater tightness.

We must not forget about the need for seasonal adjustment - in summer and winter, the fit of windows should be different. Such technical adjustments are an essential part of preventive maintenance.

Equally important is the "human factor". If the structure was mounted by non-professionals, the sashes or frame may be skewed. Leaky sealed gaps, improperly executed slopes are the causes of problems. If a new window “weeps”, you must first address your claims to the company that performed the installation. Masters are obliged to evaluate the quality of installation and (if necessary) make adjustments.

What to do if the windows "cry" after proper installation?

There are no questions about the technical condition, but condensation still forms on the glasses. In this case, the problem should be sought inside the apartment.

Increasing the room temperature

Measurements should be taken: if in the center of the room the thermometer shows less than 20 degrees with a plus sign, the windows will sweat during the cold period anyway. Together with high humidity in the house, this can lead to tangible health problems, and also cause dangerous fungi to appear on the walls.

Batteries exposed

Even hot batteries will not dry out the double-glazed window if they are covered with wide window sills. Ideally, at the installation stage, it is desirable to provide special ventilation holes through which heat will go up. The same applies to "wired" radiators recessed into decorative boxes - they look aesthetically pleasing, but do not provide normal circulation of heated air.

Airing

The rooms should be regularly refreshed (if possible, keep the frames in a special ventilation mode during the day). In the kitchen, it is necessary to install an additional hood, and clean the existing ventilation (on your own or with the help of professionals). It is desirable for residents of apartment buildings to make sure that their riser neighbors have not dismantled the shaft to increase the usable area. Such reconstruction is prohibited by law and must be removed at the expense of the owner who performed the uncoordinated redevelopment.

"Drying" the air

Sometimes you have to deal with high humidity, which is extremely difficult to bring back to normal. This applies, in particular, to basements and apartments on the first floor of old houses, above the basement. Here, only special installations for dehumidifying the air will solve the problem.

Window or wall inlet valves help to solve the problem with the lack of normal circulation. The first ones are installed directly on the frame, the second ones crash into a specially punched hole in the wall (this option is more difficult to perform and more suitable for private houses). The influx of the "outboard atmosphere" is minimal, no drafts can appear, but the windows will never fog up.

Of the "home remedies" the most popular are:

salt placed on the windowsill in small containers - it absorbs moisture well, only this product should be changed often (the effect will be better if the crystals are first calcined in the oven);
a conventional fan or combined with a heater - if you direct it to the windows, the glass will be heated and dried;
special anti-foggers, which are sold in stores for motorists.

Bloggers in the fight against fogging windows from the inside of the room

How to make the "ideal" humidity?

The first step is to use a hygrometer - a portable device instantly shows what the "root of evil" is. If the humidity exceeds sixty percent, condensation cannot be avoided. You can solve the problem by initially choosing a warmer double-glazed window - a two-chamber, with an energy-saving coating, filled with argon (according to professionals, it is 2-2.5 times warmer). With wide window sills, it is advisable to install special ventilation valves.

How to check the quality of the apartment hood? It is necessary to take a paper napkin and bring it to the opening of the ventilation shaft. When the latter functions normally, a thin piece of paper "sticks" to the grate. If this did not happen, it is necessary to clean the mine (or restore it - if it was destroyed during redevelopment, repair).

On the frame itself, you can place a fresh air inlet valve - it is better to take care of this right away, at the stage of installing new plastic structures. The most effective solution is to install a special supply and exhaust system in the room. This additional expense will definitely pay off - the windows will not freeze through, they will last longer, and there will be no risk of mold and mildew appearing in the apartment.

Silica gel in the back wall of the double-glazed window

You must first remove the double-glazed window itself and carefully examine it - it is possible that damage has appeared on the side edges. Any cracks and openings must be thoroughly cleaned and resealed. No defects found? Then, most likely, the double-glazed window has an initial marriage - silica gel, which should absorb excess moisture, does not cope with its function. Accordingly, it is necessary to eliminate this shortcoming.

We select one small area, clean the old sealant - cut it with the tip of a knife to an aluminum frame and carefully remove it. In the center of the opened metal, we make a hole with a screwdriver - as carefully as possible, drilling only the back wall. Now we need to pour out the old silica gel, which does not cope with its task. A similar procedure must be performed on all sides of the double-glazed window.

The next step is heating and drying the moisture with a hair dryer (preferably a building one). Pour new silica gel into the holes, and then seal with electrical tape. Its outer surface should be degreased and covered with sealant, leveled (remove excess) with a knife or spatula. After hardening, the repaired double-glazed window can be installed back.

Installed plastic windows bring not only coziness and comfort to the apartment, but also unexpected problems. With the advent of cold weather, condensation appears on the glass. Sometimes there are so many of them that puddles remain on the windowsill.

This is a serious problem, since dampness on the windowsill leads to mold. The fungus is difficult to remove and has a detrimental effect on all family members. Its pores fly in the air and enter the human body.

Helpful information:

First, let's look at the causes of condensation.

Why do plastic windows sweat?

There was no condensation on the old wooden windows, but it appeared on the new plastic ones. So the reason is in the windows themselves? You're right. The old wooden windows were not so airtight, there was ventilation from micro, and sometimes no more :) cracks. And the new ones fit so tightly that they do not allow air to penetrate from the room to the outside.
This is how humidity accumulates in the apartment.

Since the glass on the window is the coldest surface in the apartment, condensation forms there.

The first thought that comes to mind is to make the glass not so cold. This can be achieved by increasing the number of air chambers in a double-glazed window. On a triple and double glazing, much less condensate accumulates than on a single-chamber.

The second reason may be poorly made slopes. If they are not well insulated, then naturally they will freeze, leaving drops of water on the surface. Though .

What to do with sweating plastic windows?

Remove all plants from window sills. Wet soil adds excess condensation to the window. In general, remove everything from the windowsill. I had a case: they put a soft toy in the corner of the window and in a week mold literally began to grow behind it.
Daily ventilation. You can’t do without it, and besides, a change in the air in the room has a beneficial effect on health. Set the window to micro ventilation, the handle turns 45 degrees and the window opens literally a centimeter. Can buy . Install a forced extractor fan in the kitchen and bathroom and use it more often :).
There are already quite a lot of devices for dehumidifying the air in the apartment on the market. Before buying it, you need to measure the humidity of the air using a measuring device - a hygrometer. To feel comfortable in the apartment, the humidity of the air should be in the range of 40-70%. I'm going to buy myself a hygrometer to find out at what humidity the condensate will disappear in my apartment. If you are interested - write in the comments, I will definitely answer.
The method is flammable. You can light a candle on the windowsill. It will heat the air and thereby reduce or completely remove moisture from the window.
Follows from the fourth way. You can reduce the window sill or make holes in it. Thus, the heat from the battery will better heat the double-glazed window.
You can use car defoggers. It helps motorists, so why not use it at home? There may be less condensation. Write in the comments if you have tried this method.
Use of a room fan. You need to turn it on low power and direct it to the window. Let it push warm air to the window.

There is an interesting video: how to cope with a very large amount of condensate on the window.

Reading 8 min.

When faced with the case of the current window, many believe that window manufacturers or installers are to blame. They are partly right, but fogging most often indicates good tightness of plastic windows and reliable protection of the apartment from noise and cold.

Then what is the reason for the formation of moisture?

Common Causes of Moisture

Long-term use of plastic windows in various weather conditions allows you to identify possible causes for moisture.

Increased indoor humidity.

You can check the humidity in a room with a hygrometer.

In any apartment there are sources of moisture. Some of them can lead to its increase to a very high level. These primarily include:

washing clothes and drying;
cooking hot food;
water procedures in hot water;
houseplants;
aquarium;
wet repairs;
redevelopment of the apartment.

In addition, the level of humidity affects health. Fortunately, the problem is eliminated very simply: just ventilate the room. It is better not to forget about it even in winter.

Violation of ventilation.

You can check the exhaust ventilation with fire

A very common cause of condensation on windows.

In an ordinary apartment, hoods are used for ventilation in the toilet, bathroom and kitchen. Ventilation ducts are brought to the roof of the building and are regularly serviced.

The reasons for the violation of ventilation can be:

foreign debris entering the ventilation duct;
closing the exit of the ventilation duct on the roof with a satellite dish;
destruction of the protective grille at the inlet of the ventilation duct;
intentional closing by residents of the entrance part of the ventilation duct, as a source of cold air entering the apartment.

If the ventilation is faulty, the heat exchange in the apartment is disturbed. Warm air, touching the cold glass, turns into condensate.

Houses built in Soviet times had leaky windows, so there was air circulation in the apartment. Plastic windows have sharply limited the flow of air from the street, as a result, humidity rises, which condenses on the windows.

Ventilation is greatly improved by installing exhaust fans.

If your supply ventilation is not working properly, install an exhaust fan.

Cases are not excluded when, during redevelopment, building codes for ventilation of the apartment are not taken into account. The consequences are observed on the glass windows.

Violation of natural convection.

In winter, the condition of the windows is greatly influenced by the heating system.

Due to convection, the air heated by the battery moves up, then moves along the ceiling, where it cools, and falls to the floor along the wall opposite from the battery.

As a rule, batteries are installed under the windows, so moving warm masses heat the glass. It is known that humid air condenses when it comes into contact with a cold surface.

If the natural convection in the apartment is not disturbed, then the windows always remain dry.

Violation of convection occurs for various reasons:

a wide window sill is installed, which limits the flow of warm air to the windows. The problem disappears after holes are made in the windowsill;
a decorative grille was installed that hides the heating battery and prevents the movement of warm air masses. For the period of the heating season, it is better to remove such a grate;
massive curtains and curtains were hung, blocking the free flow of warm air to the frames. It is required to constantly monitor their position in relation to the battery.

Read also: Smoking on the balcony: prohibited or not?

Depressurization of a double-glazed window.

Moisture inside the glass is a sign of depressurization of the double-glazed window

The construction of glass fixed at a distance is a standard double-glazed window. High sealing is created between the glasses, on which the internal state of the package depends. This design never fogs up from the inside due to the adsorbent that absorbs moisture during the manufacturing stage.

Only the destruction of the sealant, which is smeared around the perimeter of the bag, leads to moisture getting inside, and the glasses fog up.

During installation work, the frame is first of all attached, and then the package is installed on special gaskets. This operation requires special care.

Compaction mode set incorrectly.

With the help of a hexagon, you can independently change the sealing mode

For plastic windows, there are two sealing modes: summer and winter.

In winter, in the summer version, the sashes are pressed against the frame less, so the thermal insulation is not high enough, which means that cold air is able to penetrate into a warm apartment. The window fogs up.

To select the desired temperature mode, it is enough to adjust the eccentrics on the side of the sash with a key.

Poor quality installation.

Many mistakes made during the installation of windows do not appear immediately, but after a month or a year. These errors primarily include:

when measuring, gaps were not taken into account;
installation was carried out in an uneven and uncleaned opening;
mounting seams are filled with low-quality material or are not completely filled;
insufficient frame mounting depth selected;
slope restoration technology is broken.

These errors lead to a violation of the temperature state of the double-glazed windows and, as a rule, to the appearance of condensate.

Poor installation - leads to sad consequences

Small video example:

What to do when windows leak

The easiest way to avoid current plastic windows is to ventilate, in which humidity and temperature are evenly distributed throughout the room.

In different conditions, different methods of ventilation are selected.

Micro-ventilation.

This is a function provided by the design of the window. It is enough to set the handle to the upper position, and the sash will move a short distance for free access of air from the street.

Using a comb.

The comb can be bought at a hardware store

This is an additional fitting that limits the angle of inclination of the sash. The slope is selectable in steps up to 60 degrees. As a limiter, a hook is used, which is mounted on the frame.

Climate valve installation.

This is an additional device that is mounted on the top of the frame. It is connected to the outdoor air and controls its flow into the room. The air supply is set manually or automatically. The ventilation process in automatic mode is controlled by the level of humidity in the room.

Other ways to prevent the current windows from appearing include:

installation of an air conditioner with a split system to maintain standard humidity and temperature;
increase in glass area when replacing windows. Large glasses warm up better and cool down longer;
placing a convection screen on the windowsill that directs warm air onto the glass;
installing a fan in a window opening to move air;
glass treatment with anti-fogging agent for cars;
glass equipment with low-voltage electric heating, as in a car;
use transparent and thin curtains that cannot block the movement of air masses. In addition, they will be a moisture filter;
do not force the window sill with bulky objects, flowers, containers with liquid;
put a container with lime or salt on the windowsill. These compounds absorb moisture and dry the air;
contact window installers if there is a suspicion of poor-quality products or violations during installation.