Why does a plastic window sweat? Why do plastic windows sweat from the inside and how to fix it. High humidity is the main problem

The article examines in detail the answer to the question why plastic windows sweat from inside the apartment. The text contains full review reasons that influence the condition of window structures and the formation of condensation on their surface. Based on these data, effective ways to solve the problem of fogging of double-glazed windows in an apartment and private house, as well as on the balcony, are proposed.

Why do plastic windows sweat from the inside in an apartment?: nature of condensate

If moisture constantly accumulates on plastic windows, you should not ignore this problem. The presence of condensation can create favorable conditions for the development of fungal spores and mold in the apartment. To get rid of excess moisture forever, you need to figure out why plastic windows in your apartment fog up and eliminate the reason causing this effect.

What causes the appearancecondensation on plastic windows

Moisture that accumulates on the glass surface of windows is called condensation. Its appearance is due to disturbances in normal evaporation. Air contains small amounts of water vapor. It is formed during drying clothes or preparing food in the kitchen, from human breath, etc. As the temperature decreases, water undergoes a transition from a gaseous to a liquid state, resulting in condensation settling on the glass.

Some types of materials can freely pass water vapor, so condensation does not form on their surface. Glass is not included in these materials. It creates a kind of barrier for the smallest particles of water contained in the air, which entails the appearance of drops on the surface of the window. Glass is not able to retain heat, so it is always cold. The lower the temperature of the window surface facing the room, the higher the likelihood that drops will appear on it.

If the windows in the apartment fog up, this indicates problems with the microclimate in the room.

Such violations of the operating conditions of the room include:

• increased humidity levels;
• poorly functioning ventilation system;
• weak heating.

If everything is in order with the circulation of air flow in the room, even the most budget double-glazed window with simplest design will not fog up, so if such a problem occurs, you should definitely determine its source. In some cases, it is enough to slightly adjust window design and sometimes it may be necessary complete replacement defective glass unit.

Note! The temperature at which the water contained in the air in the form of vapor turns into a liquid state is called the “dew point”.

What causes plastic windows to sweat?during the winter months

Fogging of glass on windows winter time is not uncommon. In this case, along with dampness, ice may appear on the surface of the structures. IN in this case plastic windows in an apartment fog up due to the difference between the temperature parameters of the double-glazed window and the microclimatic conditions in the room.

This may be due to increased heating when the room temperature reaches 25-29°C. Usually heating systems are calculated so as to balance the microclimatic conditions in the room. Due to the entry of cold air from the street through the cracks, the temperature decreases if the heating in the apartment is increased. When to replace wooden windows sealed double-glazed windows, this function disappears. The absence of cracks leads to an increase in temperature and humidity levels, as a result of which condensation accumulates.

Another reason why plastic windows sweat in an apartment is the formation of cold bridges. They help cool the window sill, which causes a difference between the temperature of this element and the air in the room itself. In such a situation, you need to measure indicators. Condensation appears if the difference exceeds 5-7°C.

In addition, fogging of double-glazed windows in winter is promoted by blowing. Most often, the source of the draft is the vestibule. If there is a gap under the bottom loop, it freezes. This can be noticed without measuring temperature indicators.

Why do plastic windows in the house sweat?: imperfections and defectsdesigns

To understand why plastic windows in a house sweat from the inside, you should study the features of these structures. When renovations are carried out indoors, a frame is installed in the opening onto which the sashes are fixed. They can be either stationary or mobile. The number of sashes is not limited to one or two. This depends on the window configuration. The glasses are placed parallel to each other so that free air space is formed between them. Inside there is a frame made of aluminum and material that absorbs moisture.

Due to this structure, the possibility of condensation inside the windows is eliminated. If the installation is carried out incorrectly, moisture may get inside the structure. A similar effect occurs when the sashes are not installed securely. Heat and air penetrate inside the glass unit, which causes condensation and, in the future, mold. In this case, to prevent the windows from fogging up, it is better to contact an experienced specialist who will carry out the installation work correctly.

Note! The design of a metal-plastic window has internal mechanisms and fittings. If you do not figure out in a timely manner why the windows in your house are sweating, constant exposure to condensation will significantly reduce the service life of these elements.

Why do plastic windows sweat from the inside in a private house?: defects and structural damage

The formation of condensation on the glass may be due to a manufacturing defect. To avoid difficulties associated with dismantling and replacing a window, it is advisable to carefully inspect the product in the store before purchasing.

Factory defects include the following:

• gaps in the sashes;
• deformations on the frame or irregular shape this element;
• poor fixation of fittings, etc.

The manufacturer is responsible for the quality and tightness of window structures. Even the slightest deviation from the standards can cause significant problems. During operation, such plastic windows sweat and leak; what to do in this case depends on the nature of the defect. Most often, a new double-glazed window is simply installed. If the manufacturing company monitors its reputation, then if there is a manufacturing defect, the poor-quality design will be replaced free of charge.

The presence of cracks is one of the reasons why windows in an apartment sweat. Such damage occurs if the process of transportation or installation of structures is carried out carelessly. Many apartment owners turn a blind eye to minor cracks that appear on the glass, which is a mistake.

It is not recommended to try to mask the damage yourself using glue or putty. This approach will not bring results, but will only take time and money. Cracked glass must be replaced. This is the only way to protect your home from fungi and drafts.

Single-chamber window structures have only one layer. The space between the inner panes is kept to a minimum, which can cause fogging. The gap size is no more than 3 cm, which significantly affects the thermal insulation of the window, reducing its level.

Helpful advice! It is not advisable to install single-chamber double-glazed windows in a residential area. Such structures do not retain heat well. Such savings are very doubtful. The low price of these products does not at all justify those low prices. technical parameters which the buyer ultimately receives.

Why do PVC windows sweat?: how the level of quality of materials affects the operation of windows

Many Decoration Materials have a low level of vapor permeability. In some cases it may be completely absent. This finishing property is necessary so that water vapor is removed outside the room and does not accumulate on the glass in the form of condensation.

Primer is widely used as a finishing material before installing double-glazed windows. Its use has a detrimental effect on the level of vapor permeability of the coating. Non-woven and vinyl wallpapers, despite the claims of the manufacturers, also have a bad effect on this indicator.

It is worth noting that double-glazed windows sweat stronger than windows having wooden frames. This is due to the fact that natural material has good throughput, unlike plastic. Through the pores that wood has, unnecessary moisture is drawn out of the room and goes outside.

Initially, poor-quality sealing material serves as the basis for the rapid appearance of cracks through which heat leaks. As a result, constantly accumulating condensate provokes the development of fungal spores. Similar problems with insulation arise when window installation standards are violated, measurements are taken incorrectly from the frame, and the double-glazed windows are poorly fixed.

Why do plastic windows sweat from the inside?: influence of operating conditions on a double-glazed window

Temperature changes can cause condensation. To understand the mechanism according to which the this process, and to understand why plastic windows fog up, you will need to consider the basic laws of physics. When water evaporates, its particles rise into the air and remain as vapor in one of its warm layers.

In nature, this process looks like this:

1. The water evaporates and rises.
2. Once cold levels in the atmosphere are reached, the moisture is converted into droplets.
3. As water accumulates, it forms into rain clouds.

Moisture acts differently indoors. The air in the rooms has approximately the same temperature, so droplets rush to cold surfaces. In the bathroom, condensation forms on the tiles, and in living rooms - on the windows. The windows are exposed to air flow from the street, which cools the glass. If the temperature in the room does not reach the optimal level, the windows are not able to warm up. This is why windows fog up in the winter.

Related article:

A step-by-step description of the technology, an overview of the features of the fittings and how to work with them. Rules for adjusting structures.

Why do wooden windows sweat?and PVC structures: factor of influence of temperature and moisture

If fogging occurs only in winter, then the main reason for this is frost outside. The interaction of warm and cold air flows provokes the formation of condensation. This problem can most often be associated with the use of single-chamber windows that are prone to freezing. If there is a strong drop in temperature at night, ice may form on the windows. Under the influence of heat, it begins to melt, causing abundant water to appear on the window.

Helpful advice! To prevent windows from sweating, experts recommend monitoring the air humidity level in the room and sticking to the optimal level.

In winter, the weather is changeable, thaws are replaced by wet snowfall, so the air is saturated with moisture. If there are cracks and crevices in the windows, cold dampness from the street can penetrate through them, which contributes to dew.

The optimal air temperature in a living room is in the range of 18-23°C. If the heating system fails, the air near the window will not be able to warm up. Therefore, glass under the influence of frost with outside will become an excellent basis for the formation of condensate.

Sometimes plastic windows fog up due to increased indoor humidity. Optimal indicator for living rooms it is 40-50%. If the permissible level is exceeded, natural vapors in the air are converted into droplets and accumulate where heat does not pass through. Poor ventilation enhances this process.

How to determine the humidity level of a living space:

Why do windows sweat?: violation of operating conditions

When construction and repairs are completed, homeowners often wonder why the windows in a wooden house sweat immediately after commissioning. The fact is that at many stages of building arrangement, wet Finishing work. As a result, the treated surfaces transfer excess moisture to the air in the room over a period of time. The duration of this period depends on the material from which the walls are made. To eliminate fogging in this case, it is advisable to ventilate the rooms more often. This will allow the materials to dry.

One of the common reasons why windows on a balcony in an apartment or private house sweat is poor-quality installation work, in particular misuse foam. This happens because after installing the double-glazed window into the opening, all the gaps are filled polyurethane foam and disguise themselves decorative strips. This approach has a lot of disadvantages, since the material for sealing cracks wears out quite quickly. As a result, dampness and precipitation will freely enter the room.

Using a wide window sill can worsen the operating conditions of the room. In most cases, radiators are installed directly under the windows. If the window sill is too wide, it will impede natural ventilation, which may be one of the reasons why the windows in the room fog up. In this case, the battery will serve as a source of heat, which, due to the wide window sill, will not be able to heat cold glass.

Note! The windows that sweat the most in the houses of those people who are actively involved in household chores and also rarely ventilate the premises. During household chores and physical exercise, the body's moisture production increases.

Amount of water vapor in everyday life:

During repairs, the air gets into a large number of moisture. The formation of condensation on windows can be the result of the following procedures:

• laying tiles;
• wall decoration with wallpaper;
• coloring;
• applying putty to surfaces, etc.

Depending on the type of work and the properties of the materials, drying the surface may take several days, and in some cases weeks. In new buildings, renovations take years. Therefore, it is very important to learn how to find the source of excess moisture and know what to do if the windows sweat in each of the cases that you may have to encounter.

The windows in the apartment are sweating: what to do?if there is condensation on the glass

Irregular ventilation, the presence of a large number of plants or a spacious aquarium in the interior, lack of an exhaust hood, poor construction and finishing materials are not all the reasons that explain why plastic windows inside a double-glazed window sweat. What to do in each case depends on the source of the problem. Only by eliminating it can you get rid of condensation forever.

Owners of private houses are much less likely to encounter the problem of wet glass. This is due to the possibility of providing good ventilation, constant opening entrance doors and the presence of attics. All this helps remove excess moisture. With apartments, things are much more complicated, so it’s worth taking a closer look at the options applicable to this type of housing.

What to do ifWindows sweat: what to dowhen air exchange is disrupted

Daily ventilation of the premises will help partially improve air exchange in the rooms. With this simple and effortless procedure, you can reduce the amount of moisture that enters your home as a result of the following actions:

• drying wet clothes in the room;
• long-term use of the stove for cooking;
• growing indoor plants in large quantities;
• active physical exercise.

You don't have to keep the windows open for hours to achieve the desired result. It is enough to ventilate the room twice a day for 15 minutes.

What to do to prevent plastic windows from sweating: how to fix the problem with a wide window sill

The wide window sill prevents the penetration of heat from the radiators to the glass. This problem is very common, so many apartment owners are interested in what to do to prevent windows from sweating in such conditions.

Experts offer two solutions:

1. Reduce the size of the window sill.
2. Install a convection grill.

It is not always possible to use the first option, since not every room will look aesthetically pleasing with a narrow window sill. As an alternative, a convection grill is used. This element is mounted above the battery. The convection grille allows hot air to flow to the cold glass, preventing condensation from settling.

To install a convection grill you will need:

• a grille that will provide ventilation;

• milling machine;
• silicone for fixation;
• tape measure for taking measurements.

Many window sills that come complete with double-glazed windows are equipped with such grilles made of brass, polymers or stainless steel. If such a grille is not available, it can be ordered from the store. It is better to entrust the installation of this element to professionals. If the work is done independently, the main thing is to ensure that the distance between the edging of the window sill and the grille does not exceed 3 cm.

What to do ifWindows in the house are sweating: what to do?to enhance tightness

If single-chamber double-glazed windows are installed in the house, it is better to replace them with double-chamber structures. Such products are filled with air inside, they are sealed and have improved characteristics. Cooling of single-chamber structures occurs much faster, so owners of such apartments often face the problem of glass fogging and freezing.

The more glass parts a plastic window has, the lower the thermal permeability of the structure. If the glass is constantly covered with condensation, you need to not only understand what to do to prevent the windows from sweating, but also figure out what characteristics deserve attention when buying a new product. This will prevent the problem from occurring in the future.

Criteria for choosing high-quality double-glazed windows:

1. Distance between window glass(no more than 20 mm).
2. Type of glass (marked K or I, having a soft or hard coating).
3. Glass thickness (at least 6 mm).
4. Spacer frame material (steel, fiberglass, plastic).
5. Sealant for fixing the frame (thiokol - improves physical properties, butyl - increases insulation characteristics).

Note! A high-quality window should not have optical distortion, chips, cracks, as well as moisture inside the structure. Using a rack, it is very easy to find out whether a product is deformed by measuring it along the diagonals. For a window whose width is 1.5 m, the permissible discrepancy is 0.3 cm. This indicator for structures 2.5 m wide is 0.4 cm.

How to eliminate condensation ifplastic windows sweat: what to doat high humidity

During the cooking process, a considerable amount of moisture is released, some of which settles on the windows in the form of condensation. The use of kettles, frying pans, pots, ovens, as well as heating water in electrical appliances - all this contributes to an increase in water vapor in the air. The use of the bathroom is also accompanied by the release of a large amount of moisture, but this problem is most acutely felt in the kitchen.

To balance the process of increased steam formation, which is typical for the kitchen, you need to remove excess moisture from the air. To do this, just install it indoors high-quality hood above hob. But even with this equipment, ventilation must be performed.

When using the stove, it is advisable to close the doors in the kitchen so that steam laden with odors does not enter the living rooms. If this is not done, microparticles of food will contaminate the glass surfaces in the room, settle on the windows, and be absorbed into clothing, decoration and furniture.

If fogging of windows occurs in the living room due to the presence of dense vegetation, it is advisable to clear the window sill of flowers as much as possible or move them away from radiators and other heating devices. Exposure to heat stimulates increased release of moisture by plants, which also block natural light from the street. It also wouldn’t hurt to remove from radiators and decorative fountain and an aquarium, if they are present in the room.

What to do if plastic windows sweatdue to installation errors

Poor quality fittings can cause many problems. When choosing a window design in a store, you should not skimp on its contents. Cheap fittings will provoke the appearance of mold, the fight against which will entail additional costs.

All window locking mechanisms must ideally support the design parameters. If the handle does not fit well in closed position, you should think about replacing the fittings. The same goes for hinges. Their fastening must be strong to prevent the appearance of cracks. The sashes must rest carefully against the frame.

If replacing the fittings does not change the situation, you should think about reinstalling the window. Installation work It is better to entrust it to the hands of experienced and qualified specialists. This eliminates the possibility of errors associated with incorrect measurements, weak fastening of structural elements and sealing slopes with foam.

Helpful advice! By using the services of a company engaged in professional window installation, you can not only count on quality result, but also receive a guarantee for the work performed. In addition, specialists from such a company can provide comprehensive advice on the operation and care of double-glazed windows.

How to adjust the sashes ifplastic window sweats: what to dowhen switching to winter mode

In some modifications metal-plastic windows There is a function for changing seasonal modes. In other words, the sashes can be installed in a certain position in accordance with the weather conditions outside. This allows you to control the degree of ventilation of the room, as well as retain heat to one degree or another.

The sashes installed in summer mode, do not fit too tightly to the frame. This is enough for the flows fresh air circulated freely. At the same time, the window provides protection from dirt and dust, as well as heat. Design tuned to winter mode, prevents the penetration of cold and drafts into the room.

The presence of this function is very easy to check. If there are holes in the side of the sash in the form of an asterisk or hexagon, it means that the manufacturer has provided the ability to adjust the modes. You can perform this procedure yourself. This must be done as carefully as possible so as not to damage the fittings.

There are many nuances that affect the operation of windows. If condensation appears on double-glazed windows in your home, you can independently identify the cause of this problem. To do this, it is enough to check the performance indicators of the room and the quality of installation of the structure itself.

To eliminate the risk of moisture appearing on the glass in the future, it is advisable to maintain an optimal level of humidity and temperature in the room, as well as timely cleaning ventilation holes and hoods in the kitchen. All this will allow you not to worry about the condition of the windows and will protect your home from mold and dampness.

You decided to change the windows to plastic ones and after installing them you were very happy, since the rooms with them were noticeably transformed, and besides, the apartment became much warmer and quieter. But with the arrival of the first autumn cold weather, the windows began to fog up, and in winter water began to flow through them. What to do in such a situation? Why do plastic windows sweat? – We will try to answer these questions in this article.

Before moving directly to the reasons for the formation of moisture on plastic windows, it is worth noting that fogging is a fairly common situation. As for whether plastic windows should sweat, this is a relative question; plastic windows should not sweat due to external factors and it is quite natural that they will fog up due to some internal ones. Now let's look at why plastic windows sweat.

Reasons for fogging of plastic windows

The most important and common cause What causes plastic windows to sweat is high humidity in the apartment.

Causes high humidity can be very diverse. Quite often, the reason for high humidity in an apartment is poor desoldering of the room, when it is cool outside and the radiators are barely warm, the window gets very cold and because of this, condensation forms on it.

The second reason is food preparation. When you prepare food, especially when you cook it, all the steam from the kitchen turns into moisture, and because of this, the humidity in the entire apartment increases.

Another reason for windows fogging is washing. When you wash things and hang them around the apartment, again, they increase the humidity in the room, which leads to moisture on the windows.

Incorrect heat circulation from the heating source

This may include either a lack of normal heating or simply wrong system circulation of heat from a heating source. If there is no normal heating, then the room will be cool, and it is clear that the windows will fog up. It’s another matter when the radiators are very hot and the windows are still wet. Everything is explained very simply. The specificity of heating a room with a radiator is such that the heat emanating from it rises upward and from there warm air circulates throughout the room. Despite the fact that the battery is located near the window, the heat from it may simply not reach the window itself. Because of this, a “cold zone” is formed in the lower part of the plastic window, where the window does not warm up, but remains cold and sometimes freezes. Most often, this is due to the window sill being too protruding, which prevents the passage of heat from the radiator to the window. This also includes decorative finishing batteries, when the entire battery is hidden in a specially constructed niche and a grille is made there, thus no heat reaches the window at all.

If you do not have a centralized and autonomous heating, and you heat your apartment with electric heaters, you yourself understand that they cannot fully ensure the correct circulation of warm air in the room, which is why the windows will fog up.

Very often, in order to save money, many order the installation of windows by an unqualified team of installers, or you are simply unlucky and come across careless craftsmen who, either due to negligence or carelessness, installed the window incorrectly, that is, not according to the standards. If this happened, then the first echoes of this will be detected a few months, or maybe days, after installation. As for how poor window installation can affect window fogging, there are a lot of options.

The most common mistake that installers make is poor sealing of the cracks between the window opening and the window. Thus, due to the lack of tightness, cold from the street passes through the cracks, so moisture forms on the window.

Often, due to improper installation of a plastic window, it warps, which is why the window itself begins to let in the cold. Due to the skew of the window, the sash does not fit tightly to the profile, which leads to depressurization.

As a result of improper installation of the window sill, moisture may form both under it and on it, again due to the lack of sealing.

Poor quality window

The reason for window fogging may be the window itself. Here, of course, first of all we can name low-quality fittings - the mechanism that is responsible for the movement of the sash: opening and closing. If the fittings themselves, due to their malfunction, cannot tightly press the sash to the profile, the same depressurization occurs.

In addition to faulty fittings, low-quality window elements can also include defective double-glazed window fasteners, which do not press the double-glazed window tightly to the profile - another reason for depressurization.

You probably know that plastic windows come in various modifications. In the window profile itself there are so-called chambers, which are responsible for the thermal insulation of the profile itself and the glass unit chamber. The number of profile chambers and glass units plays a very important role when you carry out. Conscientious installers, before you order plastic windows, should have taken into account a large number of factors:

• Which side do the windows face (south or north);


• What kind of heating is in the house?


• Number of windows in the room;


• The size of this room.

Unadjusted transoms

As a result of temperature changes, the window profile may narrow and expand. That is why it is necessary to adjust the sash. If this is not done, the sash will not be pressed tightly against the profile, which is why it will be blown out.

Worn rubber seal

Along the perimeter of the sash and window opening, a rubber seal is inserted in the plastic windows. It ensures a tight fit of the sash and a tight seal. If the seal wears out and becomes hard rather than elastic, then it does not provide a good seal.

Drain holes are clogged

When you open the sash, there are small holes in the bottom of the profile. These are holes in the drainage system, due to which, during ventilation, water flowing from the outside of the glass enters the drainage hole and flows out. If the drainage hole or the entire drainage system is clogged, then water will simply flow from under the sash.

How to prevent windows from fogging up

Then begin the fight against high humidity in the apartment. Install good hood above kitchen stove, which will remove all the steam and moisture into the vent. In this situation, moisture-absorbing devices that absorb moisture formed in the apartment will be very useful. Ventilate the room at least once every three hours.

Be sure to switch the windows to winter mode twice a year, at the beginning of summer and at the beginning of winter, in order to extend the service life of the fittings and preserve the seal on the windows. The windows are adjusted by turning the clamping clamps: in summer they turn vertically to loosen the pressure on the sash, in winter, on the contrary, horizontally to press the sash tightly against the profile. If the transom does not fit tightly to the profile due to wear and tear rubber seal, then replace it. When cleaning windows, do not forget to clean the drainage holes. This is not a recommended procedure, but a mandatory one.

Seal the gaps in the opening between the profile and the wall, using polyurethane foam. Sealing must be done not only on the sides and top of the window, but also at the bottom; to do this, you will need to remove the drain, which is attached to the profile with self-tapping screws. We blow out all the existing voids with foam; when it has swollen and dried, we cut off its excess.

For other reasons for window fogging, you cannot do anything on your own; only a specialist can help you with this.

The article examines in detail the answer to the question why plastic windows sweat from inside the apartment. The text contains a complete overview of the reasons that affect the condition of window structures and the formation of condensation on their surface. Based on these data, effective ways to solve the problem of fogging of double-glazed windows in an apartment and private house, as well as on the balcony, are proposed.

Why do plastic windows sweat from the inside in an apartment?: nature of condensate

If moisture constantly accumulates on plastic windows, you should not ignore this problem. The presence of condensation can create favorable conditions for the development of fungal spores and mold in the apartment. To get rid of excess moisture forever, you need to figure out why plastic windows in your apartment fog up and eliminate the reason causing this effect.

What causes the appearancecondensation on plastic windows

Moisture that accumulates on the glass surface of windows is called condensation. Its appearance is due to disturbances in normal evaporation. Air contains small amounts of water vapor. It is formed during drying clothes or preparing food in the kitchen, from human breath, etc. As the temperature decreases, water undergoes a transition from a gaseous to a liquid state, resulting in condensation settling on the glass.

Some types of materials can freely pass water vapor, so condensation does not form on their surface. Glass is not included in these materials. It creates a kind of barrier for the smallest particles of water contained in the air, which entails the appearance of drops on the surface of the window. Glass is not able to retain heat, so it is always cold. The lower the temperature of the window surface facing the room, the higher the likelihood that drops will appear on it.

If the windows in the apartment fog up, this indicates problems with the microclimate in the room.

Such violations of the operating conditions of the room include:

• increased humidity levels;
• poorly functioning ventilation system;
• weak heating.

If everything is in order with the circulation of air flow in the room, even the most budget double-glazed window with the simplest design will not fog up, so if such a problem occurs, you should definitely determine its source. In some cases, it is enough to slightly adjust the window design, and sometimes it may be necessary to completely replace the defective double-glazed window.

Note! The temperature at which the water contained in the air in the form of vapor turns into a liquid state is called the “dew point”.

What causes plastic windows to sweat?during the winter months

Fogging of glass on windows in winter is not uncommon. In this case, along with dampness, ice may appear on the surface of the structures. In this case, the plastic windows in the apartment fog up due to the difference between the temperature parameters of the double-glazed window and the microclimatic conditions in the room.

This may be due to increased heating when the room temperature reaches 25-29°C. Typically, heating systems are designed to balance the microclimatic conditions in the room. Due to the entry of cold air from the street through the cracks, the temperature decreases if the heating in the apartment is increased. When wooden windows are replaced with sealed double-glazed windows, this function disappears. The absence of cracks leads to an increase in temperature and humidity levels, as a result of which condensation accumulates.

Another reason why plastic windows sweat in an apartment is the formation of cold bridges. They help cool the window sill, which causes a difference between the temperature of this element and the air in the room itself. In such a situation, you need to measure indicators. Condensation appears if the difference exceeds 5-7°C.

In addition, fogging of double-glazed windows in winter is promoted by blowing. Most often, the source of the draft is the vestibule. If there is a gap under the bottom loop, it freezes. This can be noticed without measuring temperature indicators.

Why do plastic windows in the house sweat?: imperfections and defectsdesigns

To understand why plastic windows in a house sweat from the inside, you should study the features of these structures. When renovations are carried out indoors, a frame is installed in the opening onto which the sashes are fixed. They can be either stationary or mobile. The number of sashes is not limited to one or two. This depends on the window configuration. The glasses are placed parallel to each other so that free air space is formed between them. Inside there is a frame made of aluminum and material that absorbs moisture.

Due to this structure, the possibility of condensation inside the windows is eliminated. If the installation is carried out incorrectly, moisture may get inside the structure. A similar effect occurs when the sashes are not installed securely. Heat and air penetrate inside the glass unit, which causes condensation and, in the future, mold. In this case, to prevent the windows from fogging up, it is better to contact an experienced specialist who will carry out the installation work correctly.

Note! The design of a metal-plastic window has internal mechanisms and fittings. If you do not figure out in a timely manner why the windows in your house are sweating, constant exposure to condensation will significantly reduce the service life of these elements.

Why do plastic windows sweat from the inside in a private house?: defects and structural damage

The formation of condensation on the glass may be due to a manufacturing defect. To avoid difficulties associated with dismantling and replacing a window, it is advisable to carefully inspect the product in the store before purchasing.

Factory defects include the following:

• gaps in the sashes;
• deformations on the frame or irregular shape of this element;
• poor fixation of fittings, etc.

The manufacturer is responsible for the quality and tightness of window structures. Even the slightest deviation from the standards can cause significant problems. During operation, such plastic windows sweat and leak; what to do in this case depends on the nature of the defect. Most often, a new double-glazed window is simply installed. If the manufacturing company monitors its reputation, then if there is a manufacturing defect, the poor-quality design will be replaced free of charge.

The presence of cracks is one of the reasons why windows in an apartment sweat. Such damage occurs if the process of transportation or installation of structures is carried out carelessly. Many apartment owners turn a blind eye to minor cracks that appear on the glass, which is a mistake.

It is not recommended to try to mask the damage yourself using glue or putty. This approach will not bring results, but will only take time and money. Cracked glass must be replaced. This is the only way to protect your home from fungi and drafts.

Single-chamber window structures have only one layer. The space between the inner panes is kept to a minimum, which can cause fogging. The gap size is no more than 3 cm, which significantly affects the thermal insulation of the window, reducing its level.

Helpful advice! It is not advisable to install single-chamber double-glazed windows in a residential area. Such structures do not retain heat well. Such savings are very doubtful. The low price of these products does not at all justify the low technical parameters that the buyer ultimately receives.

Why do PVC windows sweat?: how the level of quality of materials affects the operation of windows

Many finishing materials have a low level of vapor permeability. In some cases it may be completely absent. This finishing property is necessary so that water vapor is removed outside the room and does not accumulate on the glass in the form of condensation.

Primer is widely used as a finishing material before installing double-glazed windows. Its use has a detrimental effect on the level of vapor permeability of the coating. Non-woven and vinyl wallpapers, despite the claims of manufacturers, also have a bad effect on this indicator.

It is worth noting that double-glazed windows sweat more than windows with wooden frames. This is due to the fact that natural material has good throughput, unlike plastic. Through the pores that wood has, unnecessary moisture is drawn out of the room and goes outside.

Initially, poor-quality sealing material serves as the basis for the rapid appearance of cracks through which heat leaks. As a result, constantly accumulating condensate provokes the development of fungal spores. Similar problems with insulation arise when window installation standards are violated, measurements are taken incorrectly from the frame, and the double-glazed windows are poorly fixed.

Why do plastic windows sweat from the inside?: influence of operating conditions on a double-glazed window

Temperature changes can cause condensation. To understand the mechanism by which this process occurs and understand why plastic windows fog up, you will need to consider the basic laws of physics. When water evaporates, its particles rise into the air and remain as vapor in one of its warm layers.

In nature, this process looks like this:

1. The water evaporates and rises.
2. Once cold levels in the atmosphere are reached, the moisture is converted into droplets.
3. As water accumulates, it forms into rain clouds.

Moisture acts differently indoors. The air in the rooms has approximately the same temperature, so droplets rush to cold surfaces. In the bathroom, condensation forms on the tiles, and in living rooms - on the windows. The windows are exposed to air flow from the street, which cools the glass. If the temperature in the room does not reach the optimal level, the windows are not able to warm up. This is why windows fog up in the winter.

Related article:

A step-by-step description of the technology, an overview of the features of the fittings and how to work with them. Rules for adjusting structures.

Why do wooden windows sweat?and PVC structures: factor of influence of temperature and moisture

If fogging occurs only in winter, then the main reason for this is frost outside. The interaction of warm and cold air flows provokes the formation of condensation. This problem can most often be associated with the use of single-chamber windows that are prone to freezing. If there is a strong drop in temperature at night, ice may form on the windows. Under the influence of heat, it begins to melt, causing abundant water to appear on the window.

Helpful advice! To prevent windows from sweating, experts recommend monitoring the air humidity level in the room and sticking to the optimal level.

In winter, the weather is changeable, thaws are replaced by wet snowfall, so the air is saturated with moisture. If there are cracks and crevices in the windows, cold dampness from the street can penetrate through them, which contributes to dew.

The optimal air temperature in a living room is in the range of 18-23°C. If the heating system fails, the air near the window will not be able to warm up. Therefore, glass exposed to frost from the outside will become an excellent basis for the formation of condensation.

Sometimes plastic windows fog up due to increased indoor humidity. The optimal figure for living rooms is 40-50%. If the permissible level is exceeded, natural vapors in the air are converted into droplets and accumulate where heat does not pass through. Poor ventilation enhances this process.

How to determine the humidity level of a living space:

Why do windows sweat?: violation of operating conditions

When construction and repairs are completed, homeowners often wonder why the windows in a wooden house sweat immediately after commissioning. The fact is that at many stages of building arrangement, wet finishing work is carried out. As a result, the treated surfaces transfer excess moisture to the air in the room over a period of time. The duration of this period depends on the material from which the walls are made. To eliminate fogging in this case, it is advisable to ventilate the rooms more often. This will allow the materials to dry.

One of the common reasons why windows on a balcony in an apartment or private house sweat is poor-quality installation work, in particular the incorrect use of foam. This happens because after installing a double-glazed window into the opening, all gaps are filled with polyurethane foam and masked with decorative strips. This approach has a lot of disadvantages, since the material for sealing cracks wears out quite quickly. As a result, dampness and precipitation will freely enter the room.

Using a wide window sill can worsen the operating conditions of the room. In most cases, radiators are installed directly under the windows. If the window sill is too wide, it will impede natural ventilation, which may be one of the reasons why the windows in the room fog up. In this case, the battery will serve as a source of heat, which, due to the wide window sill, will not be able to heat cold glass.

Note! The windows that sweat the most in the houses of those people who are actively involved in household chores and also rarely ventilate the premises. During household chores and physical exercise, the body's moisture production increases.

Amount of water vapor in everyday life:

During repairs, a large amount of moisture enters the air. The formation of condensation on windows can be the result of the following procedures:

• laying tiles;
• wall decoration with wallpaper;
• coloring;
• applying putty to surfaces, etc.

Depending on the type of work and the properties of the materials, drying the surface may take several days, and in some cases weeks. In new buildings, renovations take years. Therefore, it is very important to learn how to find the source of excess moisture and know what to do if the windows sweat in each of the cases that you may have to encounter.

The windows in the apartment are sweating: what to do?if there is condensation on the glass

Irregular ventilation, the presence of a large number of plants or a spacious aquarium in the interior, lack of an exhaust hood, poor construction and finishing materials are not all the reasons that explain why plastic windows inside a double-glazed window sweat. What to do in each case depends on the source of the problem. Only by eliminating it can you get rid of condensation forever.

Owners of private houses are much less likely to encounter the problem of wet glass. This is due to the possibility of providing good ventilation, constant opening of entrance doors and the presence of attics. All this helps remove excess moisture. With apartments, things are much more complicated, so it’s worth taking a closer look at the options applicable to this type of housing.

What to do ifWindows sweat: what to dowhen air exchange is disrupted

Daily ventilation of the premises will help partially improve air exchange in the rooms. With this simple and effortless procedure, you can reduce the amount of moisture that enters your home as a result of the following actions:

• drying wet clothes in the room;
• long-term use of the stove for cooking;
• growing indoor plants in large quantities;
• active physical exercise.

You don't have to keep the windows open for hours to achieve the desired result. It is enough to ventilate the room twice a day for 15 minutes.

What to do to prevent plastic windows from sweating: how to fix the problem with a wide window sill

The wide window sill prevents the penetration of heat from the radiators to the glass. This problem is very common, so many apartment owners are interested in what to do to prevent windows from sweating in such conditions.

Experts offer two solutions:

1. Reduce the size of the window sill.
2. Install a convection grill.

It is not always possible to use the first option, since not every room will look aesthetically pleasing with a narrow window sill. As an alternative, a convection grill is used. This element is mounted above the battery. The convection grille allows hot air to flow to the cold glass, preventing condensation from settling.

To install a convection grill you will need:

• a grille that will provide ventilation;

• milling machine;
• silicone for fixation;
• tape measure for taking measurements.

Many window sills that come complete with double-glazed windows are equipped with such grilles made of brass, polymers or stainless steel. If such a grille is not available, it can be ordered from the store. It is better to entrust the installation of this element to professionals. If the work is done independently, the main thing is to ensure that the distance between the edging of the window sill and the grille does not exceed 3 cm.

What to do ifWindows in the house are sweating: what to do?to enhance tightness

If single-chamber double-glazed windows are installed in the house, it is better to replace them with double-chamber structures. Such products are filled with air inside, they are sealed and have improved characteristics. Cooling of single-chamber structures occurs much faster, so owners of such apartments often face the problem of glass fogging and freezing.

The more glass parts a plastic window has, the lower the thermal permeability of the structure. If the glass is constantly covered with condensation, you need to not only understand what to do to prevent the windows from sweating, but also figure out what characteristics deserve attention when buying a new product. This will prevent the problem from occurring in the future.

Criteria for choosing high-quality double-glazed windows:

1. Distance between window panes (no more than 20 mm).
2. Type of glass (marked K or I, having a soft or hard coating).
3. Glass thickness (at least 6 mm).
4. Spacer frame material (steel, fiberglass, plastic).
5. Sealant for fixing the frame (thiokol - improves physical properties, butyl - increases insulation characteristics).

Note! A high-quality window should not have optical distortions, chips, cracks, or moisture inside the structure. Using a rack, it is very easy to find out whether a product is deformed by measuring it along the diagonals. For a window whose width is 1.5 m, the permissible discrepancy is 0.3 cm. This indicator for structures 2.5 m wide is 0.4 cm.

How to eliminate condensation ifplastic windows sweat: what to doat high humidity

During the cooking process, a considerable amount of moisture is released, some of which settles on the windows in the form of condensation. The use of kettles, frying pans, pots, ovens, as well as heating water in electrical appliances - all this contributes to an increase in water vapor in the air. The use of the bathroom is also accompanied by the release of a large amount of moisture, but this problem is most acutely felt in the kitchen.

To balance the process of increased steam formation, which is typical for the kitchen, you need to remove excess moisture from the air. To do this, it is enough to install a high-quality hood above the hob in the room. But even with this equipment, ventilation must be performed.

When using the stove, it is advisable to close the doors in the kitchen so that steam laden with odors does not enter the living rooms. If this is not done, microparticles of food will contaminate the glass surfaces in the room, settle on the windows, and be absorbed into clothing, decoration and furniture.

If fogging of windows occurs in the living room due to the presence of dense vegetation, it is advisable to clear the window sill of flowers as much as possible or move them away from radiators and other heating devices. Exposure to heat stimulates increased release of moisture by plants, which also block natural light from the street. It also wouldn’t hurt to remove the decorative fountain and aquarium from the radiators, if they are present in the room.

What to do if plastic windows sweatdue to installation errors

Poor quality fittings can cause many problems. When choosing a window design in a store, you should not skimp on its contents. Cheap fittings will provoke the appearance of mold, the fight against which will entail additional costs.

All window locking mechanisms must ideally support the design parameters. If the handle does not lock well in the closed position, you should consider replacing the hardware. The same goes for hinges. Their fastening must be strong to prevent the appearance of cracks. The sashes must rest carefully against the frame.

If replacing the fittings does not change the situation, you should think about reinstalling the window. It is better to entrust installation work to the hands of experienced and qualified specialists. This eliminates the possibility of errors associated with incorrect measurements, weak fastening of structural elements and sealing slopes with foam.

Helpful advice! By using the services of a company engaged in professional window installation, you can not only count on a high-quality result, but also receive a guarantee for the work performed. In addition, specialists from such a company can provide comprehensive advice on the operation and care of double-glazed windows.

How to adjust the sashes ifplastic window sweats: what to dowhen switching to winter mode

Some modifications of metal-plastic windows provide a function for changing seasonal modes. In other words, the sashes can be installed in a certain position in accordance with the weather conditions outside. This allows you to control the degree of ventilation of the room, as well as retain heat to one degree or another.

The sashes installed in summer mode do not fit too tightly to the frame. This is enough for fresh air to circulate freely. At the same time, the window provides protection from dirt and dust, as well as heat. The design, configured for winter mode, prevents the penetration of cold and drafts into the room.

The presence of this function is very easy to check. If there are holes in the side of the sash in the form of an asterisk or hexagon, it means that the manufacturer has provided the ability to adjust the modes. You can perform this procedure yourself. This must be done as carefully as possible so as not to damage the fittings.

There are many nuances that affect the operation of windows. If condensation appears on double-glazed windows in your home, you can independently identify the cause of this problem. To do this, it is enough to check the performance indicators of the room and the quality of installation of the structure itself.

To eliminate the risk of moisture appearing on the glass in the future, it is advisable to maintain an optimal level of humidity and temperature in the room, as well as promptly clean the ventilation openings and hoods in the kitchen. All this will allow you not to worry about the condition of the windows and will protect your home from mold and dampness.

Factors influencing fogging of PVC windows from the inside

Increasingly, you can notice in houses and apartments a newfangled trend of installing or replacing traditional wooden frames to plastic windows, which are rapidly replacing them, gradually displacing them from everyday life. One can understand the choice of consumers in favor of plastic windows: it is rightly justified by the presence of a number of advantages that provide excellent sound and heat insulation. However, sometimes owners of PVC windows tend to panic when they are faced with the problem of glass fogging. Absolutely incomprehensible? What to do in this case, what to do? Could this be a manufacturing defect or an unscrupulous attitude of installers towards the consumer and the quality of the work performed? After all, such incidents had not previously been observed with the wooden predecessors of plastic windows... Oh-oh-oh! Are all the efforts wasted in vain, and the money is simply thrown away? Or maybe plastic windows should sweat? Don't despair! Problems must be solved as they arise! First you need to find out possible reasons the appearance of moisture on plastic windows. So, what is the reason for fogging of plastic windows inside?

Let's start with the fact that there are two types of glass fogging on windows:

1. Moisture condensation inside the glass unit;
2. The appearance of moisture on the inner window glass.

Water vapor from the air condenses on the glass unit as a result of increased air humidity in the room, or the main reason may be excessive low temperature glass surface. If moisture appears inside the double-glazed window, then this fact indicates poor-quality production or installation of the window. If you consider yourself one of the victims of such an incident, then you absolutely should contact the company that installed the window and demand replacement of the double-glazed window (you should not forget that the warranty period after installation is five years).

Situations that contribute to fogging of plastic windows

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Most often there are situations in which fogging of windows occurs with inside premises. The reasons for their occurrence turn out to be quite banal. According to the disclosure of the meaning of the concept “dew point”, found in a physics course, we can recall that this concept serves to indicate the appropriate temperature level at which moisture in the air drops out as condensation. The influencing factors on the dew point value are temperature and relative humidity.

When we understand the situation why plastic windows sweat inside, and sometimes the condensation is quite strong, we can easily find ways to correct the situation. After all, the main aspect of the problem described above is the timely identification of the cause, so that all the shortcomings can then be painlessly corrected.

First of all, you shouldn’t let depression win over your emotions when you notice that moisture has appeared inside your new windows. It is best to keep in mind the fact that it is very easy to get rid of condensation on the glass yourself - to do this, just increase the air temperature in the room or lower the humidity.

To level up temperature regime, especially people most often face this question in winter, the primary factor will be taking care of the thermal insulation of the room. The solution to this obstacle may be methods of insulating external walls or installing a “warm floor” system.

With a comprehensive desire to dramatically change the situation regarding the final elimination of condensate, it is worth thinking about possible installation a narrow window sill that will not serve as a barrier to the warm air rising from the radiators blowing onto the glass. If this is not possible, then you should think about creating improvised additional devices for heating glass.

Cause of condensation on plastic windows

The most common victims of condensation are relatively cheap (budget) versions of single-chamber double-glazed windows. Why does such an unpleasant event happen? This is precisely the most common case when consumers, for the most part, are chasing a relatively low price, and not high quality. But as you know, “the miser pays twice,” or even much more times. In budget designs of double-glazed windows, the distance between the glasses does not exceed 30 m, which leads to a decrease in thermal insulation capabilities and a significant decrease in the temperature level of the inner wall.

To maintain a higher temperature of the internal glass, it is recommended to install double-glazed windows whenever possible. The most relevant and useful would be a similar installation of double-glazed windows indoors either in the food preparation area (i.e. in the kitchen) or in other internal living spaces with high levels of humidity.

Air humidity is the second determining factor that has a huge impact on the fogging of double-glazed windows. The main advantage of plastic windows is their excellent tightness, but it is worth considering the other side of the coin. It is the tightness in a particular case that can do a bad job and be the main reason for the appearance of condensation. A gradual deterioration in ventilation levels leads to an increase in humidity levels. The way to reduce it will be to clean it ventilation grilles or in more frequent ventilation of rooms. It will be useful to open the windows for at least 10-15 minutes every day. Such short periods of ventilation will not be a significant factor in reducing the room temperature in winter, but will be a contributing criterion for reducing relative humidity air.

Decorative flowers grown on windowsills can also play a role significant role for the formation of increased levels of condensation. It should be noted that flowers standing on window sills not only help create an atmosphere of coziness and comfort, but also serve as a stabilizer for window fogging, since they act as a kind of barrier to the free circulation of warm air near the glass.

There is great benefit to regularly ventilating windows in winter period installation of plastic windows with microventilation function will help. Such a design will create only a small gap around the perimeter of the window, through which air will directly pass. In this case, the windows may not be afraid of precipitation or strong winds.

What to do if PVC windows fog up

So, let's briefly list the main methods and methods of dealing with foggy plastic windows:

1. Replacing single-chamber double-glazed windows with double-chamber ones;
2. Installation of a narrow window sill or special improvised devices to supply warm air to the glass;
3. Creation of reliable and durable thermal insulation of the room;
4. Regular ventilation;
5. Timely repair of the ventilation system in case of urgent need;
6. It is inadmissible to place ornamental plants on window sills.
7. Installation of micro-ventilation structure.

Ways to combat fungal mold on PVC windows

We cannot ignore the fact that since the appearance of metal-plastic windows in our lives, in addition to a number of advantages, a significant, sometimes even outweighing number has appeared. positive points, the disadvantage is the lack of a natural method of air exchange in the room. As a result, dark dots begin to appear on the walls and in the corners where they join windows, which over time grow in size and turn into huge dark spots. Plastic windows become moldy over time. Mold fungus itself has high degree viability and poses a great danger to the body. For him, sub-zero air temperatures are not a hindrance, because... at the same time he is in “hibernation”. Fungal spores even survive exposure high temperatures, because they require long and costly financially heat treatment process. Concomitant factors for the appearance of mold are high level humidity in the living room, low-efficiency ventilation, poorly installed windows, characterized by disgusting sealing. Houseplants that thrive in moist, earthen environments make excellent breeding grounds for fungal spores. In turn, it is worth noting that especially whimsical plants water is required, the conductor of which is a special sprayer. And water sprayers, in turn, act as a catalyst for great content water vapor in the air, which also creates favorable conditions for the spread of mold. Fungal spores can settle in various areas of the room, being carried along with air and dust. As favorable climatic conditions are found for their further functioning, the spores multiply and germinate at lightning speed. Fungal spores have an extremely Negative influence on the human body, leading to the development of severe respiratory tract diseases, allergies that gradually develop into asthma, and childhood diathesis.

Fighting mold is difficult, but necessary and possible. To do this, you need to take note of effective techniques and methods for combating fungal mold, namely:

1. Ventilate the room after washing, bathing, cooking, wet cleaning, drying wet laundry, spraying plants with water;
2. Availability of natural or artificial ventilation (air conditioners, preferably with a filter);
3. An important factor is good and uninterrupted heating in room;
4. Removing fungal spores using biocides, during the use of which you should be extremely careful, because most of them are poisons. Chlorine-containing agents such as Belizna, Domestos, copper sulfate, etc. can provide all possible assistance in the fight against fungus. It is fortunate that currently the range of antifungal agents is replete with variety on the shelves. Now finding an antifungal agent will not be the slightest difficulty and will not cause any problems.

The initial stage in the fight against mold is to determine the causes of its occurrence and select effective methods struggle. And only after this stage will it be possible to eliminate the negative consequences.

Video: Why do plastic windows fog up?

Nowadays, people often install plastic windows. They don't require special care: they do not need to be insulated before winter arrives. The design perfectly protects against noise. But even the highest quality double-glazed windows can cause grief to apartment owners. Why do plastic windows sweat, how should this problem be solved?

Excessive humidity can lead to the appearance of mold and mildew in the apartment. They can cause significant damage to health. Foggy window structures do not look aesthetically pleasing.

Contact highly qualified specialists!

People who have spent a lot of money on apartment renovations cannot understand: why do plastic windows sweat from the inside of an apartment? After all, they turned to a company with a reliable reputation. The reason may be a leak in the glass unit. This is not the fault of the company installing window products. Responsibility lies entirely with the manufacturer who manufactured the poor-quality product.

How to eliminate marriage? It is necessary to replace the double-glazed window; the entire window structure should not be touched. Entrust this work to specialists; do not try to replace the double-glazed window yourself. If you have used the services of a trusted company that has been installing PVC window products for a long time, you should not worry. In such companies, a contract is concluded with the consumer and a guarantee is provided. A new sealed product will be supplied free of charge. The installation process will not take much time.

Some people go to the other extreme. They try to pay as little as possible for apartment renovations, trying to save on everything, and then they wonder: why does a plastic window constantly sweat? Single-chamber double-glazed windows should not be installed. It will cost less: you can’t argue with this fact. But experts do not recommend using it in a residential area. A single-chamber product does not retain heat well.

Causes of the problem

A plastic window sweats from the inside when exposed to other reasons. When cooking and drying bed linen, the air humidity in the apartment increases. To eliminate this problem, purchase a special hood. It will help reduce humidity in the kitchen. The apartment must have a powerful ventilation system. If it is clogged, moist air is not drawn out of the apartment, and a large amount of condensation forms.

Double-glazed windows often sweat in winter. This is due to the fact that in old apartment buildings there are heating problems. If the radiators heat poorly and the outside temperature is low, air circulation in the apartment is disrupted.

If a person decides to tidy up the balcony, starts laying tiles in the bathroom, there is excessive humidity in the room, and condensation forms in the apartment.

Why do plastic windows in an apartment sweat in winter? The reason for the formation of condensation may be poor-quality fittings of the product. If it is installed in gross violation of the basic rules, the window will not close well.

External slopes must be insulated. Foam plastic is suitable for this purpose, another construction material.

How to deal with fogging of window products?

In order to reduce the severity of the problem, it is necessary to implement preventive measures. If you have already installed a PVC product, follow a few basic steps:

1. Should be removed houseplants from the windowsill. Wet soil in flower pots promotes condensation.
2. It is necessary to ventilate the room, this will reduce the humidity level.

If you are just about to purchase PVC windows, exercise caution and prudence:

• It is necessary to choose a double-glazed window with two chambers. The best option will be purchasing a product that has an energy-saving film. Vacuum window products are currently popular. Take care of the insulation of the slopes: they must be sealed with polyurethane foam. It is necessary to use high-quality insulating materials.

Wall valves

These simple devices allow outside air to pass into the room through a hole made in the wall.

Wall valves have important advantages:

• When installing them, there is no need to change the design of the double-glazed window.
• They work great at low temperatures.
• The wall valve can be installed after the repair.
• They have high performance.
• The kit includes a special mesh and filter that provides protection against insects.

The disadvantage of these devices is a complex system installation In order to drill a hole, you need to use special equipment, so you will not be able to install the wall valve yourself without the help of specialists.

The device is placed next to a plastic window at a small height from the floor. It can be hidden from prying eyes. The outer grille of the device requires regular cleaning (this should be done 2 times a year).

Use and window valves. In them, a hole is made in the window itself. Such devices do not reduce sound insulation and do not affect the temperature in the apartment. They are characterized by low productivity and do not provide much positive effect. They should be used when the humidity in the room increases slightly.

Do you live in a wooden house?

Now it has become fashionable to build houses from timber. They are environmentally friendly and their construction does not take much time. A house made of timber looks beautiful; it does not require large financial expenditures for its construction. But condensation can also form in such residential areas. What is the reason for this phenomenon: why do plastic windows sweat and leak in such a house?

Much depends on the design of the house itself. The premises often lack a ventilation system. Therefore, high humidity occurs in the room and condensation forms.

The method of heating the house must also be taken into account. If the room is installed stove heating, the likelihood that double-glazed windows will sweat is high. The problem is uneven heating of the air. Because of this circumstance, moisture accumulates. The air near the stove gets very hot, but it is not enough heat to completely warm up the entire room.

Windows can also sweat due to improper design of the window sills: they should not be wide. In this case, heat will not penetrate to the window product.

Low-quality double-glazed windows

Assuming the building is installed correctly, everything technical requirements complied with. Why do double-glazed windows sweat in a wooden house despite all the requirements?

There is no need to install windows thicker than seven centimeters. Some people believe that such a double-glazed window retains heat well. But in everything you need to observe moderation. In window products that are very thick, condensation forms much more actively.

Sometimes experts make mistakes when assembling windows, so moisture accumulates in them.

To avoid possible problems with double-glazed windows, entrust the construction of the building to professionals. Experienced employees of the relevant timber building installation companies will supply you with good system heating, ventilation.

What to do, if wooden house old building and was inherited by its owner? After all, in such premises there is no ventilation system, it has not been done modern heating. How to create in it comfortable conditions for living without large financial investments?

To reduce the formation of condensation on windows, you need to install a powerful air conditioner. Next to the double-glazed window it is necessary to place electric heaters. This will help cope with fogging of plastic windows.

If the window sill is too wide, you can make small holes in it, this will ensure the flow of warm air to the glass unit.