Condensation appeared on the plastic windows. Condensation on plastic windows: causes, consequences and ways to deal with excess moisture on windows

The appearance of condensation accumulating on window glass is a problem familiar to owners of PVC windows. With the onset of cold weather, in many residential areas the windows begin to collect moisture, puddles form on the window sills, and dampness begins to be felt in the apartment. This phenomenon worsens the comfort of living, so there is a need to remove fogging from the glass.

The basis of glass fogging is a physical process when, under the influence temperature regime, the liquid changes from one state to another. Warm air contains some moisture in vapor form. When cooling occurs, the liquid changes its state, which causes it to settle on surfaces with low temperatures. Since the window in the apartment is the coldest place, the steam settles there.

When humidity levels are high, condensation on windows can become a serious problem as fogging dampens building construction, and as a result appears mold. And in winter time, condensation quickly turns into frost.

Dew point concept

The dew point is the temperature value at which cooling steam becomes liquid. This point can be located anywhere in the thermal insulation layer of the wall. The dew point cannot be adjusted. It cannot be seen in double glazing or on windows. It can only exist on a chart. And the main thing that is worth remembering and clearly realizing is that condensation is equally influenced by the temperature factor and humidity. The lower the moisture content in the room, the lower the dew point.

The following factors influence the dew point:

• ambient temperature;
• density of wall pie materials;
• room temperature and humidity;
• humidity of the external environment.

Danger of condensation

Installing a sealed double-glazed window not only provides comfort and warmth inside the room, but also prevents fresh air from entering the home. For this reason, the owner independently worsens the microclimate of the room.

Condensation on plastic windows- evidence of an unfavorable atmosphere in the apartment. High air humidity contributes to the appearance various types bacteria, mold and fungal formations.

According to SNIP 2.04.05-91, in the living space the temperature should vary within 20-22 °C, and the moisture content should not exceed 30-45%. These conditions are optimal for a person’s comfortable stay in the room and there is no risk of windows fogging up. Therefore, condensation on the windows is the first sign of a violation of the microclimate of the room.

Causes of condensate sedimentation

Fogging occurs due to lack of heating when steam begins to condense on the surface of the window. There are several reasons why there is condensation on windows:

1. The difference in temperature inside the living space and outside, and the high moisture content of the air inside the room. These causes of condensation on windows are the most noticeable.
2. Moisture release from low-quality finishing materials such as paint or plaster during renovation work.
3. Unfair installation window slopes when the tightness of the structure is broken. The result is a noticeable drop in temperature and fogging of windows. Often this problem occurs when self-installation slopes.
4. Installation of wide window sills that form obstacles to the entry of warm air from heating system to the window opening. When the ambient temperature is low, condensation collects on the window.
5. Installation of a double-glazed window with one chamber. Such structures are inferior in thermal insulation properties to their two-chamber analogues.

Condensation and wooden windows

There is no condensation on wooden windows due to the fact that they are able to let air through due to natural material manufacturing. In addition, they are not as airtight as plastic double glazed windows. This ensures maintenance normal level indoor humidity.

Modern plastic bags are ultra-tight and restrict air flow. Such parameters block the natural ventilation in the space, which was laid down earlier when designing residential premises.

To maintain natural moisture content, it is necessary to ventilate the room daily. Modern double-glazed windows also provide the option of gentle ventilation. It implies that the flow of air between the room and the external environment is carried out through an air valve.

Prevention of condensate sedimentation

Before you start fighting the problem of window fogging, dampness, mildew and mold in window opening, it is necessary to consider several simple ways preventing moisture from settling on windows. The appearance of condensation on windows and what to do when it first settles on the glass can be prevented by the following measures:

• maintaining a comfortable temperature in the living room;
• security natural ventilation and the flow of fresh air into the room;
• insulation of the building from the outside;
• reduction of indoor moisture content by up to 50%;
• eliminating all sources of moisture entering the living space: eliminating dampness in the basement area, repairing a leaky roof, etc.;
• increasing the heating of a double-glazed window by installing a powerful radiator under the window or cutting off the window sill;
• lack of plants from the windowsill.

Methods for eliminating condensation

You can learn more about the causes of window fogging and methods to combat this phenomenon by watching the video:

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Owners immediately notice when condensation forms on plastic windows . This unpleasant phenomenon not only spoils the appearance of the window, but is also quite harmful, since excess moisture causes the formation of mold, can accumulate on the windowsill or be absorbed into finishing materials that are not resistant to moisture. Our article will tell you how to get rid of this phenomenon and its causes.

Why is condensation dangerous?

Condensation on windows is an unpleasant occurrence. He spoils appearance structures, preventing you from seeing what is happening outside the window, can stain the curtains and be absorbed into them. In addition, excess moisture leads to the formation both on the plastic itself, since it has microscopic pores into which dirt and fungus can clog over time, and on finishing materials located in the neighborhood - for example, on the plaster of slopes or wallpaper on the walls.

Mold will not only ruin the appearance of the room, and you will have to make repairs or constantly wipe the window from moisture to get rid of this possibility, but it is also dangerous to human health, especially if allergy sufferers or asthmatics live in the room.

Why does condensation form?

Condensation may form on the room side various reasons, which must be installed, otherwise you will not be able to get rid of the problem that will appear every time there is a temperature change outside.

Most often, the reasons for the appearance of condensation on plastic windows are as follows:

• Lack of ventilation in the room with high air humidity. This problem does not arise with wooden windows, because they have the ability to breathe: passing moisture through themselves, they release it to the street. The plastic structure does not have this ability, because it is absolutely sealed. That is why, in order to cope with the problem, you will have to either ventilate the room as often as possible, or install it on the windows special valve for ventilation. In addition, you can check whether the one provided in the apartments works, and if not, restore its operation. It should have good traction. You can check this by holding a piece of paper near the vent. He must cling to it without falling to the floor.

Proper ventilation in the apartment

• Condensation on plastic windows may appear due to windows being too wide. Due to the fact that such a window sill prevents proper air circulation from heating device to the window, and the window is the coldest part of the structure, since its glass is directly affected by the street cold, drops may appear on the surface of the glass. This is especially noticeable if there are a lot of pots with plants on the windowsill, which, as a result of their vital activity, affect the appearance of condensation. In addition, moisture may spill from the pots; the soil also creates excessive dampness. In order for condensation to stop forming, the pots must be located at a distance from the glass, and the window sill must have a width that allows warm air to freely rise up and dry the glass.

Wide window sills require additional ventilation grilles for warm air access.

• If it consists of two glasses and has only one chamber, it cannot resist enough low temperatures and freezes quite quickly if the temperature is exceeded by 15-20 degrees. Due to the difference in temperature between the room and the street and the insufficient thickness of the window, condensation will turn into frost, which will melt when it warms up and end up on the windowsill. This problem can only be solved by replacing the double-glazed window with a thicker one, for example, a double-chamber one.
• Errors were made when installing the windows. In order for a double-glazed window to function correctly, it must be installed correctly. During the installation process, violations may occur, for example, depressurization will occur, the distance between the wall and the window frame will not be sealed, the ebb was installed correctly, and they were installed correctly. Sometimes such problems can be corrected, for example, by removing ebbs and slopes, making the joints airtight (for this you can use polyurethane foam and sealant), re-installing the drip tides, but now following the technology. Moisture will thus not accumulate and appear on the glass.

PVC window malfunction

• Another reason why condensation forms on plastic windows - This is a skewed window installation. If the structure has not been leveled, it may not close tightly. Because of this, the gaskets that are located between the sash and the frame do not provide a tight enough fit to the structure. Moisture passes through these cracks and cold air can enter, as a result of which not only condensation will appear in the room, but also a draft or rapid drying out.
• The use of low-quality fittings that cannot ensure a tight fit of the sash to the structure or allow the sash to be adjusted. Replacing such fittings usually quickly solves the problem.
• Using low quality . If the seal is worn out or is not of high quality to begin with, it will allow moisture and cold air to pass through, causing you to notice condensation. You can get rid of it by replacing the seals in the windows.
• Depressurization of the glass unit. If the glass unit has cracks or any defects, it was disassembled and dry air or gas came out, it will accumulate condensation, including between the glasses. This problem can only be solved by replacing the glass unit with a new one.

Knowing why condensation forms on plastic windows , You can solve the problem by getting rid of its cause, so carefully examine your window before you begin to combat this phenomenon.

What to do if condensation appears between the glasses?

Condensation appears most often at the bottom of a plastic window. However, sometimes you have to deal with the phenomenon of moisture accumulation inside a double-glazed window. Most often, condensation appears between the glasses when the glass unit is depressurized. This is due to several reasons:

• The window was produced with technological violations, purchased from an untested manufacturer that produces defective products.
• During transportation, installation or operation, the glass unit was damaged, as a result of which cracks or chips could appear, the sealing layer of sealant was removed, as a result of which the gas located between the glasses or compressed air escaped.
• The glass unit was disassembled by the owner and put back together, but the gas escaped, and the glass unit was not sealed hermetically (after disassembly, glass units often lose their properties and need to be replaced).

Only the problem is solved. You can do this either yourself or by inviting a specialist. Do not be afraid of this procedure: it is done quite simply, does not cause any difficulties, and new double glazing, as a rule, is inexpensive and changes quickly enough - in less than an hour if the work is performed by a professional.

How to get rid of condensation?

The question is how to remove condensation from plastic windows , any owner can be set plastic construction who suffers from this phenomenon. There are several ways to combat this phenomenon. First of all, you need to carefully examine the window structure and the objects and parts of the structure adjacent to it. This will help determine the most likely causes of condensation; by getting rid of the root cause, you will defeat the problem forever.

• Ventilate the room with sufficient frequency. This will help make the air less humid. Airing should be done at least three times a day for 10 minutes; in winter, this procedure can be reduced to 5 minutes.
• It is better not to keep flower pots on the windowsill or move them as far as possible from the glass.

• It is necessary to ensure that the curtains do not fit tightly to the heating devices located under the window. They can interfere with air circulation, causing windows to sweat.
• The width of the window sill plays an important role, therefore, if it is chosen incorrectly, you will have to replace the structure with one that is suitable in size. Otherwise, condensation will appear constantly in winter.

Having figured out why condensation forms on plastic windows , you can get rid of it easily. The degree of effort and financial costs depends on what is the root cause of its occurrence. In any case, fixing the problem will cost much less than possible consequences that it can cause.

They cry too. Based on the Mexican TV series on glass modern houses something like tears is formed. This is condensation. It is more common for old-style windows. Why don’t some plastic ones avoid the fate, and how to fix the problem?

Reasons for condensation on PVC windows

Condensation on plastic windows can accumulate from the side of the room, street, or inside the double-glazed window. Depending on the location of moisture, the reasons for its appearance vary. Condensation between plastic windows in approximately 40% of cases it indicates a defective product. Expertise is needed, since in the remaining 60% the problem turns out to be depressurization of windows and poor-quality installation.

Thus, poor fit around the perimeter of the profile and insufficient insulation of slopes are possible. There is also a discrepancy between the parameters of the frame and the glass unit inserted into it. Another reason for the accumulation of water between glass panes is a sharp difference in temperature indoors and outdoors.

So, at +20 degrees in the room there are 9-9.5 grams of water per cubic meter of air. Accordingly, the total humidity is slightly higher than 54%. However, at +10 the indicator in the room is already 100%. It turns out that with further cooling of the air, moisture will begin to precipitate.

On the street side, condensation accumulates in 70% of cases in the absence of ebb tides and external window sills. If there are drains, they may be installed incorrectly. This is also the reason for moisture condensation on glass. Drops can also appear if there are voids under window sills or ebbs. Water flows into the cavities, creating an area of ​​high humidity near the windows.

Fogging of windows from the outside is typical for double-glazed windows filled with argon gas inside. It is heat saving. Condensation, under a certain combination of environmental factors, forms outside of rain and other precipitation. This is precisely what worries consumers, since otherwise water settling on external glass is the norm.

Most often, condensation is observed on glass inside the home. There are 6 reasons for this:

1. Insufficient ventilation. There may be a fault in the design of the house. In private buildings, many save on ventilation, or do only supply ventilation, forgetting about exhaust ventilation.

2. Lack of ventilation. Usually occurs when the ventilation system is disrupted.

3. High humidity indoors. It happens due to prolonged cooking, washing, and an abundance of plants. The latter release moisture. Therefore, it is important to consider the area of ​​the room when filling it with flowers. Don't forget about a working humidifier. The device may also not correspond to the area of ​​the room.

4. Malfunctions of the heating system. Problems lead to temperature changes, and hence the formation of condensation.

5. Defects in the structure of the house. An example is wide window sills. They block the air flow from radiators or heated floors). As a result, the glass cools down. This is where condensation forms.

6. Designer design premises. Not only wide window sills, but also, for example, thick curtains can impede air circulation.

7. Violations during installation of double-glazed windows. The most common is insufficient sealing. You can provide it yourself. It is enough to coat the cracks. Silicone is suitable. If you take white, it will blend in with standard plastic.

It remains to mention the errors in choosing windows by consumers themselves. There are one-, two-, and three-ampere double-glazed windows. They hold heat differently. Single-chamber ones are recommended for regions with temperatures down to -10 degrees. Installation budget option in other conditions it leads to heat loss and condensation formation.

Ideal for most Russian regions two-chamber windows or with one chamber, but with argon filling and external silver plating. The metallic coating reflects the summer heat and prevents indoor heat from escaping outside in the winter. Gas, as mentioned, also works to save heat. Three-chamber double-glazed windows are for the far north.

By the way, the cause of condensation is worn-out double-glazed windows. Argon gases, for example, do not last longer than 15 years. Often, the gas evaporates after 10. Vapors begin to settle on the outdated product.

What does condensation cause?

How to remove condensation from plastic windows interests consumers not only for aesthetic reasons. Water settling on the glass indicates increased humidity, and it is fraught with:

• fungi
• mold
• reproduction of certain types of bacteria

In contrast to the last point, it is worth mentioning that other harmful strains, for example influenza, on the contrary, are suppressed in a humid environment. Therefore, therapists recommend frequent ventilation of rooms for sick people. True, the environment for this should preferably also be cool.

How to eliminate condensation

Realizing Why does condensation form on plastic windows?, the ways to eliminate it are clear. So, if drops accumulate from the inside when:

• thick curtains, you should shorten them or replace them with lighter ones
• wide window sill, you need to narrow it or make it into a structure ventilation holes
• abundance of flowers indoors and on window sills, it is worth redistributing the plants, perhaps selling or donating some
• flaws ventilation system, spend money on it, clean or frequently ventilate the premises

Check work exhaust ventilation easily by holding a sheet of paper to it. The flow of air leaving the room should press it against the hatch. Otherwise, the system does not function or its performance is insufficient.

Holes for condensation on plastic windows They can also be the result of ignorance of the double-glazed window control system. They have summer and winter modes. The latter assumes maximum fit. The adjustment is carried out using a pin (a rounded piece of hardware with a screwdriver hole in the center) on the side of the sash.

It turns out that to get rid of condensation you need to adjust the windows. If condensation accumulates on the outside of windows, it is worth assessing the weather conditions and checking for drainage. The latter may need to be installed or adjusted.

Actions taken when condensation accumulates inside a double-glazed window also stem from the reasons for the formation of drops there. If there are noticeable gaps in the structure, depressurization and improper fitting of the glass unit are likely.

If the voids are not visible, it is worth calling experts to identify manufacturing defects. If confirmed, the window will need to be replaced. Conscientious manufacturers pay for it by providing a new product.

Today, plastic windows are quite common in apartments and private houses. The design is so popular and in demand that residents sometimes do not notice its main shortcomings. A PVC window does not need to be additionally insulated in winter; it is enough to install a triple-glazed unit; in addition, it perfectly protects from external noise, dust and moisture.

Many residents faced in the autumn and winter period with such a problem - the formation of condensation on PVC windows. The phenomenon is extremely unpleasant, since black spots of mold and mildew are immediately visible, and the glass itself is covered with tiny droplets of water.

To be able to eliminate such problems yourself, you need to know the main reasons why moisture collects, as well as master preventive methods.

How can condensation affect the microclimate in the house?

Condensation on plastic windows appears in the place where the microclimate is disturbed. The cause may be increased humidity.

Moisture is an excellent environment for the growth of fungus or mold. If condensation has formed on the windows, this means that the microclimate in the room is not correct.

Many people have noticed that this problem does not arise on wooden windows. The whole point is that wooden windows First of all, they breathe. In addition, between wooden frame and glass available big gap, this in turn reduces their tightness.

Plastic windows are sealed, so main reason Condensation on windows means that air does not pass through them, so the humidity in the room increases.

How to prevent high humidity in the room?

As soon as the steam comes into contact with a cold surface, it turns into a liquid. The presence of condensation on windows indicates that the window is the coldest surface in the house. Condensation appears in the autumn-winter period, when the difference between the temperature in the house and outside is too high.

After cooking, taking a bath, and also if wet things are dried on radiators, the humidity in the apartment becomes much higher. She has nowhere to go out, she gathers on a cold surface, that is, on the windows.

How to get rid of condensation on windows?

To regulate the humidity in the house, you should set proper ventilation. In finished apartments, ventilation is already available, but it may not work properly; residents do not attach much importance to it and suffer from high humidity.

It is necessary to check how the ventilation compartment works. To see this, you need to place a switched-on lighter near the hood or a match. If the flame deviates to the side, it means that the hood is working properly; if the flame burns vertically, this means that the shaft is clogged or improperly constructed.

It happens that condensation forms on the windows when the hood is working properly. In this case, you should ventilate the room more often; in addition, when preparing food in the kitchen, you should turn on the hood.

If many family members live in the apartment, then it is necessary to install a pressure valve in the toilet. Such a device forcibly draws air from the room and discharges it into the hood.

If condensation constantly forms on the windows in the apartment, which looks like wet drops, you need to pay attention to how often this happens and at what time. If after cooking, then only a hood or forced ventilation of the room will help.

If the windows are constantly wet, then the problem lies in something completely different. It is possible that the double-glazed window is not sealed or that the baseboard near the window slopes is allowing moisture to pass through.

Why does condensation occur when windows are open?

Not everyone knows that droplets of water can appear on windows because cold air enters the room. In this case, the windows become very cold, so they almost become covered with an ice crust.

Many people do not know exactly how to solve such a problem, how to get rid of moisture on the windows. When installing a double-glazed window, the places where the frame comes into contact with the glass are usually lubricated with silicone for better sealing.

This procedure can be carried out both with plastic windows and with double-glazed windows made of wood. Sealing rubber bands are also placed on the windows; you can use a thick self-adhesive film.

It is necessary to deal with condensation only when it appears indoors. If the windows fog up from the street, this indicates that double-glazed windows are installed in the house High Quality and water does not penetrate into the room.

It is necessary to combat condensation between windows, since in the future this can lead not only to the formation of fungus or mold, but also to the destruction of the rubber seals on the windows.

Photo of condensation on windows

Condensation - droplets of moisture that form on the surface of profiles and double-glazed windows, as well as external elements of fittings - is always unpleasant. However, as soon as you see the first drops on a newly installed window, you should not panic and assume that the fault lies with the specialists who installed the windows in your house or apartment...

Before you figure out why your PVC windows sweat, look at them carefully... And determine where exactly the condensation appears? If on inner surface If there are droplets of water in the double-glazed window, this is most likely due to improper installation and leakage of the double-glazed window. If condensation occurs on the outer surface of the glass unit, if water flows from it, then there may be many more reasons.

Formation of condensation on the inner surface of the glass unit

The reason - in almost 100% of cases - is a defect in the manufacture of double-glazed windows and during installation (the inadmissibility of moisture inside the chamber is also enshrined in GOST 24866-99). This is good for the apartment owner, if only for the reason that the installation company is obliged to correct the defect. In addition, if condensation inside the double-glazed window is not accompanied by its appearance outside, or if condensation collects on external surfaces in insignificant quantities, the problem can most likely be dealt with one way or another.

Formation of condensation on the outside of the glass unit and on the profile

Possible reasons Moisture condensation on external surfaces is reduced to:

• improper installation of PVC windows ( window design either located too close to the outer plane of the wall, or located flush with the thermal insulation layer);
• too high humidity in the room (for example, large condensation appears in actively used small kitchens);
• lack of ventilation in the house;
• choosing a glass unit that is too thin and has a low thermal capacity;
• loose connection of the sashes to the frame.

It is usually not possible to immediately find the reasons why windows sweat from the inside. But there are a number of ways that will definitely help you find a reliable explanation of the source of the problem.

Finding the cause of water protruding on the glass and profile

There are several ways to find out:

• candle method (bring a lit candle or lighter to the junction of the sashes and frames, to the mounting seams - if the flame begins to fluctuate intensely, depressurization occurs assembly seams or a malfunction in the valve abutment mechanism);
• using a fan (a switched-on fan placed on the windowsill causes a large amount of water and even a puddle to appear on the windowsill, which means the double-glazed window is not working efficiently enough);
• consistent improvement of the microclimate in the house (using supply and exhaust ventilation, ventilation, sealing seams or moving radiators further or closer to the wall, reducing the width of the window sill).

As soon as the main factor causing condensation disappears, condensation will not collect.

Prevention: anticipate and avoid

What to do to avoid condensation on plastic windows? The ideal “cure” for fogging is careful selection of the installation contractor - in most cases right choice will protect you both from condensation and from any other problems.

It is worth remembering, however, that even the best PVC window installer will not be able to help you with anything if your house is humid, there is no ventilation, and you insisted that the cheapest double-glazed window be glued into the window, whose thermal insulation capabilities are clearly insufficient.

When preparing for installation - this is especially true if the windows in the house are large - try to take care of ventilation. Active supply and exhaust ventilation is capable of working miracles in these cases. Try not to place a lot of flowers, containers with liquid, aquariums, or humidifiers on the windowsill - all this increases the level of humidity and increases the risk of condensation on the glass unit.

Ventilate the room regularly and use a micro-ventilation system (if it is not installed, order it).

Carefully choose the double-glazed window and the profile from which the frames and sashes will be made - after all, the more effective the thermal insulation of the window opening, the less the risk that the windows will “cry”. Be sure to order not only the installation of windows, but also the finishing of the opening (installation of slopes), as well as the adjustment of fittings.

And finally, try not to carry out the installation during the cold season or simultaneously with repairs - above-zero temperature “overboard” according to all GOSTs and SNiPs is a prerequisite for installation.

Briefly: conclusions

Key points, reducing the risk of condensation:

• correct installation;
• the presence of good ventilation in the house (even a hood in the kitchen is already good);
• frequent ventilation;
• correct choice of glass unit and profile.

Answers on questions

1. PVC windows sweat: what to do?
First, determine where the moisture is located (inside the glass unit or outside). If it’s inside, it’s almost definitely a marriage. If it’s outside, assess whether the humidity level in the house is too high: it definitely needs to be lowered. Check the tightness of the connection of the sashes to the frame and the tightness of the seams at the opening walls.

2. Why do PVC windows produce condensation in positive weather?
As a factor causing fogging, it is not so much the temperature outside that is important, but the difference between what the thermometer shows in the house and “outside”. It is necessary that closed window provided thermal insulation of the room. It is also possible that in the house it is simply high level humidity.

3. Why do double-glazed windows sweat in autumn and winter?
In winter and autumn, they sweat due to the significant difference in temperature indoors and outdoors. If the thermal insulation is poor, the window begins to fog up, since cold air from the street and cold air “meet” on its surface. warm air from the premises.

4. Why do single-chamber double-glazed windows sweat?
Single-chamber packages in most cases are not intended for installation in windows - they perform well in cold glazing of balconies. If installed on a window, one camera is simply not enough to thermally insulate the opening. As a result, condensation forms.

5. Why in the morning on the windows from PVC condensate?
This is due to both the climate and the operating mode. central heating. The fact is that at night the temperature of the batteries is usually the highest - for 5-6 hours room temperature increases significantly. But outside in the morning the temperature is minimal.

6. Why do windows sweat after insulation?
The reasons may be the following: the insulation was carried out so well that the level of humidity in the room increases (with poor ventilation, there is nowhere for moisture to go) or the insulation was carried out with errors - moisture accumulates at the points of contact between the profile and the wall in the window opening.

7. Is condensation acceptable on double-glazed windows?
If the glass unit has no defects and if the window is installed correctly, and the humidity in the house does not exceed 45-50%, it is unacceptable. However, condensation can also appear on a good double-glazed window if the outside temperature is extremely low.

8. How to clean plastic windows if there is condensation on them?
Removing condensation - especially if it happens in winter - needs to be done very carefully, with a cloth made of non-woven fabric which absorbs water well. This will prevent the glass or plastic of the profile from being scratched by pieces of ice that may appear along with condensation.

9. What metal-plastic windows don't sweat?
They don’t sweat, in principle, just right installed windows PVC, which is regularly opened for ventilation, is located correctly (away from the outer edge of the wall), with unclogged drainage channels and with well-sealed seams.

10. Condensation with a large number of indoor plants.
This is a common phenomenon: plants form their own microclimate, which - if there are a large number of them - begins to influence the microclimate of the house. One of its components is high humidity, which ultimately provokes the appearance of condensation.

11. Condensation due to improper installation.
Very often condensation is a consequence improper installation. For example, the location is too close to the outer surface of the wall (to create a wide window sill) or the seams between the frame and the walls of the window opening are poorly sealed.

12. Why do condensation and ice appear on PVC windows?
Ice - a clear sign that the cold has found its way from the street into your home. This could be a crack in the double-glazed window, or a loose fit of the sash to the frame. Or - the double-glazed window is too thin and has few chambers (in severe frost, a single-chamber package may become covered with frost).

13. Who should I contact if plastic windows sweat and freeze?
To the company that installed your windows. In any case, specialists will quickly determine the cause of condensation and select options to eliminate it. There is no need to worry that the contracting company will “blame” its shortcomings on the microclimate of the apartment - a good contractor always cares about its reputation.