Plastic windows are crying: reasons, what to do? Plastic windows "cry": what to do? Why do plastic windows "cry"? What to do so that plastic windows do not cry

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

Then what is the reason for the formation of moisture?

Common Causes of Moisture

Long-term use of plastic windows in various weather conditions, allows you to highlight possible reasons for moisture.

Increased indoor humidity.

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

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

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

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

Violation of ventilation.

Check exhaust ventilation possible with fire

A very common cause of condensation on windows.

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

The reasons for the violation of ventilation can be:

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

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

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

Ventilation is greatly improved by installing exhaust fans.

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

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

Violation of natural convection.

IN winter period The condition of windows is greatly influenced by the heating system.

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

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

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

Violation of convection occurs for various reasons:

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

Read also: Step-by-step disposal of fungi and mold on the balcony

Depressurization of a double-glazed window.

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

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

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

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

Compaction mode set incorrectly.

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

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

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

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

Poor quality installation.

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

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

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

Poor installation - leads to sad consequences

Small video example:

What to do when windows leak

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

IN various conditions are chosen different ways ventilation.

Micro-ventilation.

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

Using a comb.

The comb can be bought at a hardware store

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

Climate valve installation.

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

Other ways to prevent the current windows from appearing include:

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

Buying and installing plastic windows, each owner hopes that now the topic of breakdowns can never be raised again. As they say, set and forget. And what a great disappointment of all the residents, when, with the advent of winter, water droplets begin to appear on the windows. We want to immediately reassure you - this is far from the worst thing that could happen. However, the problem still exists and needs to be addressed.

Why does moisture appear on the glass surface, and how to deal with crying plastic windows? This is what we plan to talk about in this article.

Weeping plastic windows: cause and effect

So, with the onset of cold weather, condensation began to form on the surface of your windows. No, the usual wiping with a rag is not enough. Of course, you can try, but if you do not find the main cause of moisture loss, there is a high probability of mold and mildew on the windows.

Important! Most owners, when a similar problem appears, immediately begin to blame everyone in a row: the manufacturer, the installer, the neighbor. However, I would like to immediately declare that if your weeping plastic windows are literally flooded with water, this only means that they are installed in accordance with all standards. Paradox, isn't it?

If condensation forms on the windows, this means that they are airtight and regularly perform their functions of protecting the residents of the house from moisture, dust and cold entering the premises. However, that doesn't make it any easier.

But why didn't the old Soviet windows cry? Perhaps they were better? Hardly. If those windows were provided with a good sealant, and all the gaps and cracks were removed from them, they, like the new plastic ones, would start not to cry, to sob.

If windows isn't at fault, then what's the problem? Whether there is a ? It is worth noting that there is not only one. Have you ever wondered why condensation accumulates on windows most often during the cold season? It's all about the dew point.

Important! When air, having a certain initial temperature and relative humidity, can no longer absorb moisture, condensation appears on the surface. That is, in this case, a dew point is formed near the surface of the window.

There is a special table by which you can calculate the dew point. It lists the three most important values: air temperature, its relative humidity and surface temperature.

All this seems complicated at first glance. If you have no desire to understand everything on your own, you can contact our specialist who will be happy to answer all your questions.

Causes of condensation

So, we figured out that the condensate that appears on the window due to the dew point is to blame. But why is all this happening?

Carrying out repair work.
A large number of residents.
Weak ventilation.
Wide window sill.
Bad heating.
Bust with houseplants.
Etc.

If you figure it out like this, then everything that changes the humidity and temperature in the room affects the appearance of condensate, and also do not forget about the surface of the window.

Important! In general, the cause of weeping plastic windows lies in the conditions of stay, but not in the technical condition of the window.

Weeping windows: what to do, how to fight?

So, we figured out the reasons for the appearance of condensate on the windows. Now, it remains to understand what to do with it. Wiping the windows with a rag is not an option. But to achieve a uniform distribution of temperature and humidity inside the room is a completely adequate solution to the issue. According to sanitary and hygienic standards, the humidity in the room should not exceed 45%, and the temperature should not be lower than 20 degrees Celsius. If you support such testimony, then, most likely, the windows will not cry.

If at first glance everything seems to be in order with humidity and temperature, but the problem still does not go anywhere, you will have to dig deeper. Do you use micro-ventilation when it's freezing outside? It's not worth doing that. The fact is that due to such manipulations, the window freezes heavily, and as a result, a dew point forms on its surface (see table). But do you need to ventilate the room? Of course you need. Open the window sash for plowing for 5-6 minutes. This period of time is quite enough to, firstly, remove excess moisture from the room, secondly, saturate the air with oxygen, and thirdly, not lose precious heat.

How to deal with crying plastic windows if there are a lot of indoor plants on the windowsill? Everything is very simple here - put them somewhere. Don't want to do this? In this case, you have to break your head and make forced ventilation or additional heating of a double-glazed window. What to give preference, you choose.

Sometimes the reason for the appearance of condensation on the windows is a wide window sill. It simply blocks the heat from the battery, aimed at heating. window construction. Changing the window sill is, of course, a troublesome business, but there is no need to do everything with your own hands. The Teplo Doma company has excellent specialists who will gladly help you solve all your problems with windows.

Weeping windows in Moscow: diagnostics and repair

If condensation forms on your windows, which subsequently turns into water droplets that form puddles right on the windowsill, then you definitely need to eliminate the cause of its appearance and move the dew point. The specialists of the Teplo Doma company will take up this work with great pleasure. Our company has vast experience in solving such problems. Don't waste your precious time when you can just call.

Plastic windows perfectly fulfill their function: they perfectly retain heat, isolate street noise and keep the temperature in the room. But a frequent occurrence is the appearance of condensate on the glass in the cold season. Why do plastic windows sweat in winter and how to fix such a problem?

Causes and consequences of fogging windows

The cause of fogging windows is hidden in physical properties water. Being in a gaseous state, it is imperceptible, but when the temperature drops, the so-called dew point is reached, that is, water vapor passes into a liquid. It is in this case that condensation forms, which settles on plastic windows.

The cause of moisture settling on the glass is high humidity.

If the windows began to fog up from the inside, there can be only one reason - this is a defective double-glazed window. This element of the entire system must be sealed, and if this condition is violated, water vapor enters, where it settles on the inner glass when cooled. This problem is eliminated by replacing the double-glazed window, the frame can be left.

However, most often condensation forms on the outer surface of the window. Why do plastic windows sweat in winter and how to eliminate such a factor? There can be several answers to this question:

Subsequently, fogging leads not only to a violation of the view through the glass. Often this process provokes the occurrence of worse phenomena:

Freezing windows and the formation of frost on them.
High humidity is the cause of mold, rot and fungus.
Water and low temperatures gradually destroy the foam in the gap and break the tightness of the entire system and the house.

Constant fogging of windows can lead to mold growth

What to do with such negative influence And how to eliminate the causes of fogging windows?

Troubleshooting

If your windows are leaking, you need to establish the cause of the phenomenon. It happens that the situation arises as a result of placing a large number of indoor plants on the windowsill, which evaporate a large amount of moisture.

Window adjustment

You can make sure what is the cause by making a simple inspection of the entire window. The first thing to do is to check the correct adjustment of the flaps and the degree of their locking.. This is done in the following way:

You can feel a strong draft by running your hand along the window.
Set fire to a match or candle, if the light fluctuates, then the tightness is broken.
Paper is placed in the sash and locked. You can pull out the sheet without any effort.

If deficiencies are found, proceed with the adjustment. The sash is set vertically and horizontally with screws located on the bottom hinge.

To adjust the sashes, tighten the bolts located on the bottom hinge

The degree of pressing is regulated by eccentrics at the ends of the window, as well as by tightening the pressure plates.

Transfer to winter or summer mode is carried out using eccentrics

Do not forget about the seasonal adjustment of windows. To do this, the regulators turn the marker inward for the summer, and towards the street in the winter.

window sills

Often windows cry due to improper air circulation during the cold season. The reason lies in the wide window sills, which block the access of warm air masses to the surface of the double-glazed window.

In this case, to normalize the circulation in the window sill, you need to drill several holes that will ensure normal access of heat to the glass.

Holes in the window sill allow warm air to heat the glass

You also need to pay attention to the grilles covering the heating radiators, perhaps they also interfere with air exchange.

slope finishing

If the window was installed with violations of technology (leaky gaps, the frame has moved), then you should contact the installer. Installers are obliged to fix such a problem free of charge.

An independent attempt to seal the gaps may not correct the situation, since the double-glazed window was initially installed incorrectly.

Finishing and insulation of slopes prevents fogging of windows

Another thing is with slopes. If finishing has not been done, it must be carried out immediately, otherwise it will lead to complete destruction. polyurethane foam in the gaps. In order for the windows not to cry, it is best to additionally insulate them using heat-insulating material ( mineral wool, polystyrene or foam plastic).

accessories

Quite often, windows cry due to poor-quality or worn fittings. All mechanisms must function normally and smoothly lock the sash with normal pressure.

Damaged seal must be replaced

The seal must be carefully inspected. It should be elastic, without tears and cracks. If there is damage, and elasticity is lost, proceed to replace it.

Ventilation

The ventilation of the room must be approached very carefully. This is especially true for rooms with increased level humidity (kitchens, bathrooms), where windows sweat most often in winter.

After all, plastic windows completely seal the room and make it difficult for air to enter from the street. You can solve the problem of air exchange in the following ways.

Check existing ventilation for blockages. This can be done by lighting a candle near the channel exits. If the light does not deviate, then the hood does not work. The grids are removed and cleaned until normal functioning is restored.

However, in addition to the exhaust system, supply ventilation must also be present. This issue is solved by installing ventilation valves on the windows.

Forced ventilation can be provided with a valve built into the handle

Today there are modern supply systems installed in the window handle, they do not spoil appearance and provide an adequate supply of fresh air.

With the provision of a normal level of ventilation, the problem of high humidity is also eliminated..

thermal insulation

Single-chamber double-glazed windows are used in most non-residential premises where thermal insulation is not so important. If such a double-glazed window is installed in the living room, then it will not provide proper heat conservation.

Thermal insulation of glass with film will not solve the problem of cold

You can fix the problem by insulating the slopes and applying an energy-saving film to the glass. But these measures will not ensure the preservation of heat in full.

Humidity level optimization

As mentioned above, this phenomenon can be eliminated by ensuring the normal ventilation of the rooms. However, if this does not help, then you can mount dehumidifiers under the windowsill. Such cartridges are inexpensive, and their efficiency is quite high..

Recent renovations can contribute to the increase in humidity in the room. A large area of plastered surfaces evaporates a huge amount of moisture, which ventilation cannot cope with. This is a temporary phenomenon and as the walls dry, the humidity level returns to normal.

As a rule, these are the main reasons that windows cry in winter. When they are eliminated, the situation will normalize and there will be no problems with fogging.

Many people install plastic windows in their apartments and houses, which protect the premises from drafts, dust, wind and cold. However, they have one serious drawback - in winter, moisture falls on the windows, which leads to the appearance of mold on slopes, window sills and window profile. Because of this, some are wondering: What to do if plastic windows cry?

Causes

To get rid of condensate, you need to figure out why they cry . The appearance of drops on glasses is directly related to the dew point. It determines the temperature at which condensation begins to appear. The dew point can change its value if one of the microclimate indicators changes in the room.

Condensation on windows

There are several main reasons why windows cry.

Ventilation

Most often, it is faulty or incorrect in the room that leads to fogging of windows. Over time, ventilation systems become clogged, which leads to disturbances in air circulation and a change in heat transfer. When air in an unventilated room comes into contact with the glass surfaces, condensation forms on them.

Often the windows are crying in people living on the upper floors of houses. Moist air from the apartments below gets into their ventilation.

Also, heat transfer is disturbed in the apartments of houses that were built according to SNiPas of the USSR. During the construction of these buildings, it was assumed that the influx of fresh air would enter through the cracks in wooden windows. The installation of airtight makes it impossible for the natural flow of air, leads to the accumulation of moisture and the appearance of condensate.

Ventilation grille in the window sill

Heating

It can also be the reason why the windows are crying. In apartments, you need to install powerful and reliable radiators that could provide good heat transfer. The window opening must be heated, so the battery must be placed strictly under the window.

The radiator should not be cluttered with foreign objects, as this may disturb the convection of moist air and lead to an increase in moisture.

Flowers

Plants on window sills look very nice, but a large number of flowers can disrupt heat transfer. Therefore, you should not force the window sill with flowers.

Lack of insulation and sealing

The place where the window adjoins the opening is a source of damp and cold air penetration. If the window seam is not insulated in time, then under the influence ultraviolet radiation will begin to break down, which leads to the appearance of mold and the penetration of atmospheric moisture.

Condensation control

Not everyone knows what to do if they sweat and cry. First you need to assess the state of the microclimate in the apartment:

Air temperature measurement. Allows you to determine the efficiency of the heating system. The air temperature should not be measured near the window, but in the center of the room. If the temperature is below +20°C, this indicates poor heating efficiency.
Measurement of air humidity. The humidity level at room temperature at 20-25°C is about 50%, but in winter time this indicator can be critical if it is -15 ° C outside. In winter, the humidity level should be around 40%.

There are several ways to get rid of condensation on windows.

Temperature increase

Contributes to the heating of the surface of the inner panes of the window. For this you need:

get rid of air locks in the battery;
flush or completely replace old heating radiators;
make sure that warm air enters the window;
turn on the heater or air conditioner.

Decrease in moisture level

It is achieved by mixing moist air with dry air. To do this, it is necessary to ensure constant air exchange in the room. There are a few tips to help you achieve this:

Extraction check. To do this, you need to attach a piece of A4 paper to the exhaust hole. If the hood is working properly, then the sheet will stick to the grate. In the same way, the ventilation in the toilet and bathroom is checked.
Ensuring the passage of air through the doors of all rooms of the apartment. To do this, make sure that there is a gap between the bottom of the door leaf and the floor.

If airtight doors are installed in the rooms, then special ventilation valves should be used, which should be located at the bottom of the doors.

Eliminate sources of moisture. These include a damp basement, leaky faucets, and leaky pipes.

Proper organization of air flow

To do this, you can use a wall or window inlet valve.

Supply valve for plastic windows

The wall inlet valve is a passive device that allows you to provide air from the street. The design consists of plastic pipe, which is installed in the wall of the apartment. Installation of the wall valve is carried out near the window at a height of 1.5-2 meters from the floor, which allows:

without problems to serve the lattice of the device, which is located outside;
hit fresh air into the heat flow of air emanating from the heating radiator.

Also, when organizing the flow of air, several types of window valves can be used:

Without milling. Easy to install and dismantle. After installation, no traces remain on the window, except for a few mounting holes. Valves without milling have a low capacity, which is only 5 m 3 /h. In the absence of sources of moisture, this is enough to normalize the microclimate.
With milling. The performance of the valve reaches 50 m 3 / h, so it must be used in rooms with active sources of moisture.

Conclusion

The question is why new plastic windows are crying in wooden house, is not unusual, since there are many reasons for this, from malfunctions in the building itself to malfunctions in the window itself. But before accusing the company of installing a bad product, you should figure it out yourself and solve the problem as soon as possible.

Causes of the problem

Such formation can be caused by a number of sources. The main cause of fogging windows is high humidity in the house.. During the frosty period, the temperature of the window surface decreases. At the same time, a temperature is reached that, by cooling the air, cannot absorb all the moisture. A similar phenomenon can be observed on the mirror when bathing in the bathroom or on glasses when one enters a warm room from a cold room.

The main reason windows fog up is poor ventilation.

If there are troubles with windows, then the problem lies in a faulty ventilation system. Often ventilation is installed in the kitchen and bathroom. If the hood is not cleaned, then over time it can collect a bunch of debris and fail.

In addition, the new windows have a high degree of impermeability, which prevents outdoor air from entering the house. Therefore, as a result, condensation forms, since there is a constant change of heat in the house, stagnant air comes into contact with the chilled glass. Often this unpleasant situation occurs in the rooms where they work, in the kitchen with many functional household appliances or bathroom.

In addition to tightness, the window itself may have an overly wide double-glazed window. Only airing the rooms will help to regulate the level of moisture in the house, you can use an air conditioner, but in order to really have a productive result, you need a good and high-quality system. When installing double-glazed windows, it is best to pay attention to their thickness. Universal and optimum thickness- up to 7 cm. Large thickness will interfere with other characteristics of the window.

Also causing a similar problem to windows in a wooden building can be:

construction or repair work indoors, where wet processes are used, plastering, painting, whitewashing ceilings, etc.;
redevelopment in the building, in which the rules may not be taken into account and violated when designing ventilation;
destruction of interior walls.

Solution

What to do to eliminate an unpleasant situation? Below are some recommendations:

It would be nice to get windows with two cameras. The second chamber will be able to keep the temperature, eliminating the sharp difference between the inner and outer panes.
On the windows, purchase tilt-and-turn fittings, which will delight you with the winter natural ventilation mode. At a certain turn of the handle, a small gap of up to 3 mm is formed. Such a small gap not only protects against the likelihood of catching a cold and getting sick, but also maintains a fairly comfortable air temperature and humidity in the room.
If possible, do not install wide window sills. They contribute to the free movement of warm air around the entire perimeter of the window.
Try to ventilate the room regularly and several times a day, at least for 5 minutes. All accumulated room moisture should go outside.
The solution to the problem begins with the correct and high-quality assembly of plastic windows in the house. Incorrect installation leads to the appearance of condensate, incorrect temperature distribution on the slopes, and then they can bloom.
In case of severe cold, a few burning decorative candles can help. It is enough to put 2-3 candles on the windowsill closer to the glass. This is a simple and cheap way, but the result is quite significant. The solution to the problem is not in the heat from the burning of a candle, but in the heat transfer from the process of burning it. Candles are also beneficial. indoor plants, because it brings their favorite carbon dioxide closer to them.
An exotic option is to seal the glass with a film or foil and apply low voltage (up to 24 V) to it, creating the effect of an electric heater.
Use conventional fans. Although they are usually used in the heat, they may also be needed in winter for the same purposes, since they will create air movement. Therefore, we install a fan near the windows and select the minimum airflow mode. Well, if the fan action extended to several windows.
Buy a special aerosol anti-fogging window, which is used to properly condense the air in cars. It is possible that this chemical method will not be able to completely solve the problem, since aerosols are very expensive and contain various chemical specific substances.
One advanced way to solve the problem is to construct convection screens. If there are no plants on the windowsill, the question is why the windows are crying, then technology lovers can make narrow plates that can transport warm steam from the radiator to the window cavity. The plate is attached to the window sill at an angle of up to 60 degrees. Then you can ensure that part of the heat will be directed and warm the glass. Having shown imagination, these screens can be made an original part of the decor in the room. However, remember that this design is a very painstaking work.

Conclusion

It is necessary to choose high-quality and proven products in order to avoid the problem of "weeping windows", carefully monitor the technology for installing plastic windows in a wooden house. And then regularly monitor the temperature and humidity in the house.

If the windows are installed correctly and tightly, then you need to calm down and realize that the problem is purely aesthetic, since the windows themselves do not suffer or deteriorate from excessive moisture.