Installing plastic windows, we spend a lot of money, but we hope to get warmth, comfort and beauty in the house, especially when the cold season comes. But with the arrival of winter, the windows are suddenly covered with numerous droplets of moisture and you see that the plastic windows are crying, you don’t know what to do. As a result, unnecessary problems only appear: puddles form on the windowsill, dampness appears in the house, and sometimes even worse - mold and mildew on the slopes.
Even if you very carefully wipe the window dry, water will still appear on it, sometimes trickling down onto the new window sill, leaving streaks and small puddles. What can we say, the phenomena are very unpleasant.
Faced with the problem of weeping windows, many of us begin to accuse manufacturing suppliers of deception. That is why it is first of all worth dispelling the myth about the poor quality of products. It’s a paradox, but still, the fact that plastic windows leak is confirmation that they are installed in accordance with all requirements: the windows are completely sealed and reliably protect your home from cold air entering inside. So how can you understand why windows are crying, what is the reason and how to deal with this problem?
There is a widespread belief that only plastic windows get wet, but this does not happen with wooden ones. This is wrong. Any modern window under certain conditions (we will consider them below) they cry, regardless of the material from which they are made - wood or plastic. Of course, Finnish wooden windows, which have double frames, get wet less than, for example, single plastic or wooden Euro-windows. The reason for this is not the binding material at all, but the fact that two-frame structures have higher thermal insulation properties.
Another example can be given: old Soviet wooden windows, unlike the plastic ones that are fashionable today, almost did not leak. However, the material has absolutely nothing to do with it either. If old windows are provided with high-quality seals in the narthex, and all gaps between the window frames and glass are removed, then these old windows will also begin to get wet, and even more so than plastic ones. Why do plastic windows get wet? Why does condensation appear on them?
The formation of condensation on windows is usually caused by a number of reasons. The main reason is increased indoor humidity. In winter, the temperature on the surface of a plastic window drops significantly and often reaches the dew point. Experts call this the temperature at which air, which has a certain initial temperature and relative humidity, can no longer absorb moisture. We encounter dew point every day. For example, when you get out of the shower, you may see that the bathroom mirror is completely fogged up, or in winter, when you come in from the cold warm room- glasses usually fog up immediately.
Why is there high humidity in the room? There are many reasons for this. Moisture is always released in the kitchen during cooking, when drying and washing clothes, taking a shower or hot bath, using the toilet. Indoor plants located on the windowsill or an aquarium in the room are also sources of moisture. The person himself, moreover, usually releases about 50 g of water per hour when breathing.
Often the reason why there is condensation on plastic windows is incorrect or faulty ventilation in the house. In apartments, ventilation systems are arranged in the following way: exhaust hood in the bathroom or toilet, as well as in the kitchen. Over time, the hood can simply become clogged with debris, which often accumulates here, and fail. In addition, plastic windows have a very high degree of tightness, and this prevents street air from entering the room. As a result, the heat exchange in the room changes sharply - the stagnant air of an unventilated room comes into contact with the cooled glass of the window, on which condensation forms.
This problem arises especially acutely in rooms with increased activity. First of all, such premises include the kitchen. This is where many multifunctional household appliances In addition, it is often located next to the bathroom. In such areas it is clear why plastic windows leak.
Residents of the upper floors of houses often face a problem, since dirty, humid air penetrates through the ventilation openings from the apartments below. Of course, windows on the first floors also often leak, because here polluted air comes from the basement or through the floor slabs. To avoid strong condensation on plastic windows, you just need to equip ventilation holes in the apartment there are forced ventilation fans with check valve. In fact, houses that were built according to SNiPs of the USSR are designed so that air flow into the premises will be carried out through cracks in the windows (the principle supply and exhaust ventilation). Sealed plastic windows practically do not allow air to pass through, making natural air flow impossible. Because of this, moisture accumulates in the apartment, which later falls as condensation on PVC windows, and in severe frost ice forms on the aluminum frame.
The system plays a very important role in the problem of condensation. central heating. Radiators must be in good working order and quite powerful. In another case, the apartment may have insufficient heat transfer and low temperature. Batteries must be located strictly under the window. It should be borne in mind that heating radiators perform very important function- they heat the window opening. If you install window sills above the radiator that are too wide, this can lead to convection difficulties warm air from the battery, and therefore the moisture content will increase. Make sure radiators are not cluttered foreign objects. Often, curtains and curtains in apartments touch the window sill, which is why a sufficient amount of warm air does not flow to the window opening.
The best way to resist the formation of condensation on plastic windows is to achieve uniform distribution of humidity and air temperature in the room. According to sanitary and hygienic standards, optimal temperature the air should not be lower than twenty degrees Celsius, and the relative humidity should not be higher than 45%.
When the windows cry, what should you do with the room? Do not forget to ventilate it regularly, at least three times a day. It is worth noting that in winter, it is better not to use micro-ventilation mode. To avoid freezing window fittings, as well as hypothermia of the slopes, it is better to open the window completely for about 5-6 minutes. This time is enough to remove all excess moisture from the room, while the heat will not have time to escape from the room.
http://www.youtube.com/watch?v=Oak0zSRCzIQ Video can"t be loaded: Fighting condensation on plastic windows (http://www.youtube.com/watch?v=Oak0zSRCzIQ)
If you are just planning to install plastic windows, choose window frames with the thickest possible profile to reduce penetration. You will lose, or rather, not gain, just a couple of centimeters of the window sill, but you will definitely have much less hassle. In addition, it is worth ordering triple rather than double glazing. A double one with one additional glass would also be suitable. In this case, you will have absolute sound insulation, and the glass will not freeze even in forty-degree frost.
If you already have plastic windows installed, then the problem when the windows are leaking, what to do, can only be solved with the help forced ventilation. In other words, it is necessary to somehow organize air exchange in the window niche.
In winter, when it's very very coldy, place several candlesticks with slowly burning candles on the windowsill, as close to the glass as possible. Thick decorative candles are best. For the whole winter, just a couple of candles on the window will be enough for you. The costs are small, but the results are very significant. Of course, the point here is not the heat that you receive when the candle burns, but the convection of air that is formed during the combustion process. In addition, a candle is very useful for plants on the windowsill, since it drives them carbon dioxide, and, as you know, this is a favorite treat for indoor flowers.
If there are no plants on the windowsill, and you are a fan of witty technical solutions and like to make things with your own hands, then try making convection screens. These are narrow plates that transport warm air from the radiator to the window niche. The plate should be fixed at an angle of 30-60 degrees to the window sill. This will force some of the warm air towards the glass. If you show some imagination, such screens can easily be turned into original decorative items. It is worth noting that this is a rather labor-intensive method.
Almost everyone at home has fans. As a rule, they work only 3-4 months a year when it is hot. But during the cold season, they can be used again for their intended purpose, because in the window niche you just need to create any air movement. Therefore, you can simply set the minimum airflow intensity and, if possible, install the fan in such a way that it blows on several windows at the same time.
Buy any anti-fog aerosol at an auto cosmetics store that is used to treat car windows to prevent them from getting wet. Treat your apartment windows with this aerosol. Be sure to thoroughly wash and dry the window first, and then apply an anti-fog agent to it. This will slightly reduce the dew point of the glass. True, this method cannot radically solve the problem. In addition, such aerosols are quite expensive and contain many specific chemical compounds and substances.
Place a thin conductive film or foil around the perimeter of the window and apply low voltage (approximately 12-24 volts) to it. It will warm up the part of the window that is most susceptible to freezing. In other words, make glass with electric heating, like in a car.
So, if you carefully ensure that the technology for installing plastic windows is fully complied with, choose a high-quality design, and then constantly monitor the level of humidity in the apartment, then you will definitely never see excess moisture flowing through your plastic windows again.
Modern windows are designed to save us from cold, noise and problems with drafts. But, as practice shows, they are very sensitive to conditions environment and if anything goes wrong, they start crying. Why does condensation appear on windows and how to get rid of it?
A very common winter problem is condensation on windows, or rather on inside window glass. Metaphorically, they say “the windows are fogging up” or “the windows are crying.” This means that the window glass becomes covered with droplets of moisture, and if this happens regularly, then the water gradually flows from the glass down to the window sill, and from there to the floor. In the worst case, constantly wet windows provoke the appearance of mold on the walls and ceiling, which is extremely difficult to get rid of.
Let's figure out why plastic windows in an apartment fog up. Droplets of water settling on the windows are moisture from the air. In the air it is, of course, contained in a gaseous state. What causes it to fall out as condensation on the windows?
The fact is that air can only hold a limited amount of water. There is a limit after which water will begin to “pour out” from the air and settle on surfaces. This limit depends, first of all, on the air temperature - the warmer it is, the more moisture can contain it. For example, a cubic meter of air at a temperature of 25°C can hold 22.8 g of water, but if you cool it to 0°C, it can only hold 4.8 g, and “get rid of” the rest: the excess will turn into condensation.
Let's imagine that it is 25°C in your room, and there are 15.9 g of moisture per cubic meter of air. This is about 70% of the possible 22.8 g/m3, i.e. The relative air humidity in our example is 70%. It would seem that there is no excess; on the contrary, the air can hold a few more grams of water, but why then do the windows in the apartment fog up? The fact is that in winter your windows are cooled by street air. The temperature of the window glass drops below 25°C, the air in this place becomes colder and its ability to hold water decreases. Even 15.96 g/m3 is too much for him. The excess falls out in the form of condensation - that’s why windows cry.
How cold does the glass have to be before you cry? The critical temperature is equal to or below the dew point.
The dew point is the surface temperature above which condensation does not form on this surface.
| Temperature air |
Relative humidity | ||||||||
| 30% | 40% | 50% | 60% | 65% | 70% | 80% | 90% | 95% | |
| -10°С | -23,2 | -20,4 | -17,8 | -15,8 | -14,9 | -14,1 | -12,6 | -10,6 | -10 |
| 0°С | -14,5 | -11,3 | -8,7 | -6,2 | -5,3 | -4,4 | -2,8 | -1,3 | -0,7 |
| +5°С | -10,5 | -7,3 | -4,3 | -2,2 | -1,1 | -0,1 | +1,6 | +3,3 | +4,1 |
| +10°С | -6,7 | -3,2 | -0,3 | +2,2 | +3,2 | +4,4 | +6,4 | +8,2 | +9,1 |
| +15°С | -2,9 | +0,8 | +4 | +6,7 | +8 | +9,2 | +11,2 | +13,1 | +14,1 |
| +20°С | +1 | +5,2 | +8,7 | +11,5 | +12,8 | +14 | +16,2 | +18,1 | +19,1 |
| +25°С | +5,2 | +9,7 | +13,1 | +16,2 | +17,5 | +18,8 | +21,1 | +23 | +24 |
| +30°С | +9,5 | +13,9 | +17,7 | +21,3 | +22,5 | +23,8 | +26,1 | +28,1 | +29 |
Determination of dew point
As you can see, the dew point directly depends on the temperature and humidity of the indoor air. In our example, at 25°C heat and 70% humidity in the room, it is enough for the glass to cool to a temperature of 18.8°C for condensation to form on it.
You may have noticed that condensation on plastic windows falls first on the bottom of the glass. Because of design features This is the part that cools the most.
However, if the window glass at the same 70% humidity is at least a degree warmer, or if the humidity at the same window temperature is 10% lower, then condensation will not form.
Having understood the reasons, we can answer the main question of the article. So, what to do if there is condensation on the windows? It is necessary to either increase the window temperature or decrease the air humidity, and in some cases (albeit infrequent) you will have to do both.
The glass inside the room, as you understand, the colder the lower the temperature outside and inside the room. But since we cannot influence the temperature outside the window, all that remains is to adjust the temperature in the room.
Low indoor temperatures may be due to non-compliance by utility services. If you feel that the apartment is cold, take temperature measurements. Remember that this must be done in the center of the room at a distance of at least one meter from the heating devices. If measurements show irregularities, contact management company. Until they take action, you will have to save yourself: they can help when the plastic windows in your apartment fog up.
It may also be that the temperature in the room corresponds to all kinds of sanitary and construction requirements, but for some reason warm air does not reach the window glass and becomes the reason why plastic windows cry. For example, the heat flow from the battery may be hampered by too much wide window sill. It serves as a barrier in itself, and indoor plants or other objects, which, as a rule, are located in abundance on such a windowsill (otherwise why would they take a wide one?), make it even more difficult for warm air to flow to the window. The list of such obstacles also includes heavy blackout curtains.
Another common reason for window freezing is insufficient glass thickness. Modern plastic windows come in single-chamber and double-chamber types. The former are usually cheaper and pass better sunlight, but they freeze faster. If you are going to install a new window, weigh all the pros and cons different types double-glazed windows.
To solve this problem, it would also be a good idea to start by finding out what the actual humidity is in your home. 40-60% is considered the norm; these are the numbers we should focus on when we want to reduce humidity and forget about crying windows. Here, however, it is important not to overdo it: air with a humidity of 10-20% will be too dry and can cause discomfort.
The easiest way to reduce humidity in the house during the cold (we emphasize) season is to regularly ventilate the apartment. When cool air from the street enters the room, it heats up, its ability to hold water increases, and the relative humidity (the percentage of moisture per cubic meter of air) decreases. There is enough room for water in such air; it “absorbs” it rather than throwing it out as condensation on the windows.
Of course, lowering humidity is only by-effect from ventilation, the main purpose of which is to let fresh air into the room in an amount sufficient for the comfortable stay of people. In general, by ventilating in winter, we kill two birds with one stone: we get fresh air and eliminate the cause of condensation on the windows. However, it is necessary to ventilate properly.
If you contact your window company with the question “Plastic windows are crying, what should I do?”, you will most likely receive a recommendation to open the sashes more often for so-called micro-ventilation. However, firstly, this is not always convenient: in cold weather, even a small hole can blow noticeably. Secondly, it is almost meaningless: the effect achieved by fifteen minutes of ventilation disappears in half an hour. Thirdly, such ventilation is fraught with freezing of the window seals, which leads to loss of tightness when closing.
Opening the window wider - in the summer - is also not possible for obvious reasons: we will get cold and drafts (we are, of course, talking about the cold season, because fogging of windows in an apartment is an autumn-winter problem).
A more suitable method of ventilation in this case is compact ventilation device. The breather is installed on the wall and supplies fresh air in a volume sufficient for 4 people (120 m3/h). The important thing is that the breather heats the supplied air, automatically maintaining the air stream temperature you set, regardless of the temperature outside the window. So there will be no blowing from the breather. In general, proper ventilation will get rid of stuffiness, condensation on windows and dampness. One of our clients shared personal experience solutions to a similar set of problems, you can read
Sometimes, after installing new metal-plastic windows, people are faced with the problem that glass, for some unknown reason, begins to “flow”. This phenomenon impairs visibility to the outside, creates excellent conditions for the development of mold and mildew in the corners of the frame, and also impairs lighting by blocking sunlight. Therefore, everyone should know why this happens and how to get rid of it. Many people believe that this is a mistake by the manufacturer or installer, but no: condensation can occur for a huge number of reasons.
There are a huge number of reasons why plastic windows can “cry”, but let’s consider only the main ones that occur most often:
⇒ Incorrect installation technology. The most common and unpleasant reason for the formation of condensation is the carelessness or inattention of the craftsmen themselves who install the double-glazed windows. Even the slightest inaccuracy or displacement can lead to the fact that the glass begins to cool intensively under the influence of the environment. Due to the difference in air temperatures indoors and outdoors, condensation occurs of water vapor contained in the atmosphere.
⇒ High humidity . Very often, condensation on windows occurs due to excess moisture in the room air. It, in turn, can be formed due to nearby sources of water or steam. This is also possible if: your apartment is located on the top floor; in the room there is a huge open aquarium with fish or other animals living in the aquatic environment; there are malfunctions (leaks, drips); drying clothes in a closed space. The points described above are sources of the formation of additional moisture, which, unable to escape, settles. All these factors can indicate the reason why plastic windows are leaking.
Favorable climate diagram and dew point 
⇒ Repair. Another fairly significant source of moisture is mortars and adhesives. When they are applied to the wall, air circulation stops, and along with it moisture, which leads to the concentration of an additional volume of liquid in the room. Especially it concerns winter period, when the difference between the ambient temperature and its indicator inside the room is quite significant.
⇒ Impassable obstacles. Creating an impenetrable wall for air circulation in the form of thick curtains or blinds is another reason for the formation of condensation. This is explained by limited space and lack of movement lead to an increase in the concentration of moisture, which then settles on the windows. Also, any large things standing on the windowsills, especially flowers, have a similar effect. They not only create an obstacle, but also release water into the atmosphere, which they draw from the soil.
⇒ Faulty ventilation. Air circulation and removal of heated masses - this is the goal of any ventilation system. If this is not done, then vapors accumulate in the room, which after some time settle on the surface of the windows. Very often, owners of apartments on the first low floors suffer because of this.
Now the question of why plastic windows leak will not be an unsolvable mystery for you. But let’s talk further about what to do in such situations.
In order to avoid water deposits on windows, you must follow these rules:
Thus, by following these simple and understandable recommendations, you can reduce the level of moisture in the room and prevent the formation of condensation on the windows. Just a few simple steps and a couple of minutes of your personal time is all that is needed to solve the eternal problem with “current” plastic double-glazed windows.
The phenomenon of “crying” windows is more or less familiar to every owner of plastic double-glazed windows. However, if for some people condensation only occasionally reminds them of the need to ventilate the room, for others it becomes a real test and requires constant attention not only to the windows themselves, but also to the adjacent surfaces and the room as a whole. After all, fogged double-glazed windows - be it in a room or on a balcony or loggia - do not just “block” the view of the street. They provoke the appearance of dampness and fungus and lead to damage to the window sill coating, which occurs due to the regular presence of flowing water on it. However, what is the reason for the increased formation of condensation? Let's try to figure it out in our article.
From school lessons we all remember the description of such a vital important process like the water cycle in nature. One of its stages is associated with the transformation of water from a gaseous state into a liquid, an example of which is in natural environment serves as dew drops falling on the grass. Invisible water vapor contained in warm air cools as temperatures drop, turning into particles of water. We can observe a similar physical phenomenon in the example of some windows, which are called “crying” due to their tendency to fog up.
Condensation occurs due to the temperature difference on the inside of the glass unit and inside the room. Accordingly, the colder the window surface, the greater the likelihood that drops of water will appear on it. By the way, the temperature of the window at which the vapor contained in the air is converted into liquid on the glass is called the “dew point”.
So, main reason condensation is a violation of the microclimate, a large gap between the temperature on the surface of the glass unit and inside the entire space of the room, house, loggia or balcony. At the same time, it is necessary to understand what this problem is connected with.
Experts identify several factors:
Lack of proper circulation of warm air;
Violation of ventilation;
High humidity;
Installation of low-quality and technologically imperfect windows, as well as their unprofessional installation.
In order to identify the true causes of the appearance of excess moisture, it is necessary to analyze under what circumstances it “decorates” the surface of the window and whether all structures in the house are susceptible to its formation. Any detail can play a role here, including the time of year and time of day when perspiration appears and turns into liquid, the depth of the window sill, heating parameters and access fresh air, Availability indoor plants and the purpose of the room.
Observing the formation of condensation, you may notice that its loss is more typical of seasonal cooling. This indicates that with the onset of cold weather outside and the heating system in the house turned on, the coldest part of the house became the surface of the glass unit. That is, the heat from heating devices either does not reach the window, or “leaves” due to some source of cold air.
If we talk about impaired circulation of warm air, here, first of all, it is necessary to pay attention to the operation of heating devices. Perhaps the reason is low heating parameters and then you just need to solve the issue with the heat supply. If the heating is at the proper level, then the reason for the appearance of drops on the double-glazed windows should be looked for somewhere nearby. First you need to check the window sill: probably, too much overhang is blocking the flow of heat into the window area. This problem can also be caused by protective screens on heating devices, which prevent heat from reaching the bottom of the window, which is why dew is released here. Thick curtains covering the radiators can also interfere with sufficient heating of double-glazed windows.
It also happens that heat loss is associated with the presence of “cold bridges” in the plastic. Because of them, the air temperature near the windowsill becomes lower than room temperature. In this case, the difference can reach 5-7°C. In addition, the entry of cold air occurs due to insufficient tightness in the area of the vestibule, seams or lower hinge. But we will dwell on this a little later.
The first thing that fans of wooden windows point out is that such structures, unlike plastic ones, “breathe”. In fact, of course, it is not the wood that breathes, but the cracks through which fresh air from the street enters the room. By the way, it is in these cracks that the secret of the appearance of fabulous winter patterns on glass lies, which you definitely cannot see on high-quality plastic windows. Is it good or bad? It depends on what to prioritize - warmth and comfort in the house or ice patterns on the glass, and sometimes ice on the frame. But let's return to the issue of ventilation.
Often the cause of condensation is poor ventilation when exhaust system does not cope with its function. By the way, checking this is quite simple - just open the sash of any window and attach a sheet of paper to the opening of the hood in one of the rooms. If the air flow presses it against the decorative grille, it means that the ventilation is working properly; if not, installation of an additional exhaust system channel is required.
Regular ventilation can also solve the problem, which will be useful not only for the windows, but also for your body. In addition, this option can be made continuous - through the organization of a permanent supply ventilation. Fresh air supply to in this case provided either by installing modern window designs with built-in microventilation systems, or through the installation of wall or window supply valves.
It is also important to ensure free passage of air through the doors of rooms, bathrooms and toilets. To do this, the distance between the floor and the bottom door leaf should be 1.5-2 cm. If there is no such gap, there should be installed at the bottom of the doors ventilation valves(transfer grids).
Often, fogging of double-glazed windows and their subsequent “crying” is caused by increased humidity in the room. Moreover, as a rule, this is not typical for the entire living space, but specifically for that part of it where the greatest evaporation occurs. This is a kitchen - with a working kettle and a switched on stove, on which food is prepared, and insulated balconies and loggias, where clothes are dried and numerous plants are pleasing to the eye.
You can get rid of excess moisture different ways– with the help of a dehumidifier, regular ventilation, use of a hood, proper housekeeping and rational operation household appliances. So, for example, turning glazed loggia V " winter Garden"be prepared for the fact that in the absence of air circulation you will encounter the so-called" greenhouse effect“and, as a result, fogging and “crying” windows. If the air exchange is disturbed, the insulated room will also turn into a mini-sauna. glass balcony, on which clothes are dried. To avoid this, you just need to set the doors to ventilation mode and ensure full air circulation in the room.
As mentioned above, the difference between the temperatures on the surface of the glass unit and inside the room contributes to the formation of condensation. Like morning dew, it covers the windows with perspiration, droplets of which ultimately end up on the slopes of the lower frame, and then on the window sill. This unnecessary moisture causes complete inconvenience, as it requires constant attention. Otherwise, the accumulation of liquid can lead to damage to the window sill coating and the appearance of mold and mildew, which is much more dangerous.
Often, condensation is caused by low-quality or technically deficient window systems, as well as the lack of professionalism of the employees of the company that installed them. The shortcomings include, in particular, the insufficient thickness of double-glazed windows, chosen based on considerations of economy, and not the climatic features of the area and performance characteristics windows Thus, in winter conditions, a conventional single-chamber system will behave incomparably worse than a standard two-chamber or single-chamber system, but made of modern heat-saving material and equipped with an energy-efficient profile.
Regular “crying” will also be typical for cheap plastic windows. They are often made from low-quality raw materials and have insufficient heat-shielding properties and tightness. In addition, the same dubious quality characterizes the fittings and profile system with which they are equipped, which means a loose fit of the sashes, gaps between the frame and the glass unit and the lack of thermal insulation. Moreover, the sizes similar products and the opening intended for them may simply not coincide.
The result of all the above defects is the freezing of the window, which, being unable to “retain” heat, at the same time perfectly conducts cold street air. The result is condensation. Caused by temperature differences at the junction of air flows, it turns into constant companion such window designs.
Let us add that when installing low-quality windows, moisture can form not only outside, but also inside the glass unit. This indicates a manufacturing defect. And about your mistake when choosing a window company.
Installing high-tech plastic windows from a reliable manufacturer will help you avoid such problems. For example, the company "Windows-Etalon", which is one of the leaders in the window market Far East, offers its customers high-quality glazing of residential spaces, as well as balconies and loggias. We are talking, in particular, about the installation of energy-efficient plastic windows in a heat-saving profile from the German concern REHAU. Modern materials, Hi-tech and professional installation make these products virtually invulnerable to natural challenges.
Windows from the Okna-Etalon company can independently regulate the temperature in the room, creating the environment in which you are most comfortable. Such unique abilities of these structures are primarily explained by the fact that their production is based on the use of i-glass. That is, glass with a multilayer coating and the finest silver coating on the surface, applied in a vacuum space and under operating conditions. magnetic field. The silver ions contained in the material allow the window to reflect long-wave heat rays towards their emitter, leaving heat where there is more of it. In other words, in summer the rays turn towards the hot street, bringing coolness into the house, and in winter they are directed towards heated rooms, thereby reducing heat loss and “returning” up to 90% of the heat waves emitted by heating devices.
Another very important technical characteristics Such double-glazed windows provide improved thermal protection performance. If for a regular double-glazed window at +20°C indoors and at an outside air temperature of -26°C the temperature on the surface of the window inside the apartment will be only +5°, then for a design with i-glass the same figure is up to +14° ( !). As you can see, the difference in temperatures is quite insignificant. This means that the likelihood of condensation, which is so characteristic of conventional window systems. By the way, in terms of thermal insulation, plastic windows with i-glass are significantly superior to their predecessors. They don't feel cold. And this also suggests that such structures will not “cry” due to the access of cold air from the street.
The profiles with which they are equipped also have high levels of thermal protection and energy efficiency. Manufactured at the factories of the famous German concern “REHAU” - a recognized world leader in the production of profile systems for modern plastic windows - they are endowed with exceptional heat-saving properties. Take, for example, the REHAU SIB profile, designed specifically to withstand harsh conditions. climatic conditions Siberia. Its unique capabilities have been confirmed in tests conducted by specialists from the leading industry institute, Research Institute of Construction Physics, RAASN. The experiment, carried out in a special chamber, demonstrated the unchanged performance characteristics of REHAU SIB under the influence of extremely low temperatures. In particular, at a temperature of outside windows at -42°C and +20°C - inside, as well as at high relative humidity of ≈55%, the window did not freeze and did not “cry” with condensation, excellently withstanding a temperature difference of more than 60 degrees. By the way, the material used to produce profiles under the REHAU brand is so ready to withstand the vagaries of nature that it performs equally well at temperatures from -50° to +50°C.
In addition, all REHAU profile systems have high waterproofing parameters. The double-circuit seal guarantees the tightest possible fit of the sash to the frame along the entire perimeter and 100% tightness. Thanks to this, plastic windows in the REHAU profile reliably protect the premises from drafts, and the windows from unnecessary moisture.
We also note that no matter which profile from the REHAU concern the customer chooses, he can be confident in the highest quality of the product. Control on the part of the manufacturer is very strict and involves conducting its own verification of the dimensional accuracy and quality of incoming raw materials, as well as analyzing its chemical and physical properties. In addition, internal monitoring is enhanced by the presence of independent experts, which overall ensures flawless high quality, which means reliability and durability of windows in REHAU profile systems. By the way, the service life of structures equipped with the latest generation REHAU profile can reach 60 years, which was proven at the testing stage.
The principle “Quality in everything!” The Okna-Etalon company also adheres to this, which also controls the quality of its products at all stages of its production. For example, to produce high-quality products, the process of cutting and cutting glass at the enterprise was fully automated. It is carried out by a special automatic table. Along with dimensional accuracy, this Italian equipment provides high-quality edge processing of cut material. And this guarantees increased tightness of double-glazed windows and, of course, increases their service life. Thus, errors and omissions characteristic of manual processing, are completely excluded here.
Just as excluded Negative consequences from unprofessional installation, so typical of fly-by-night companies. Unlike unscrupulous service providers who, unfortunately, are present on the local market, all employees of the Okna-Etalon company have undergone special training and have appropriate certificates. That is why the quality guarantee here extends not only to the plastic windows themselves, but also to their installation. The Okna-Etalon company values its reputation.
You can obtain detailed information about installing plastic windows at the offices of our partner, the Okna-Etalon company, or by phone:
My house has PVC windows. During the cold season, droplets appear on their surface, causing the double-glazed windows to sweat and leak. This is not the most pleasant phenomenon, so I decided to find out why plastic windows sweat and how to fix this problem with my own hands. I share my findings below.
It is possible to find out why plastic windows sweat in an apartment only after a detailed consideration of the concept of “tightness”. Double-glazed windows help increase thermal insulation in a room, which is why they are considered higher quality than wooden ones.
Unlike wooden PVC structures make the room more airtight, they transmit worse cold air outside and, in fact, do not release warm heat from the inside very well. Therefore, windows sweat a lot if you add poor ventilation and malfunctions of the heating system to the above factor.
Why do plastic windows sweat in winter? This is due to the fact that condensation forms on the glass only when the temperature inside is below +18 °C. Typically, this situation occurs during the heating season, when the air outside is much colder than indoors.
In addition to tightness, heating quality and indoor air convection, there are 2 more common reasons why a plastic window sweats from the inside:
As mentioned earlier, PVC windows are completely sealed, which means that the air in the room can only circulate with the help of good ventilation. Previously, through the cracks in wooden frames air could easily pass through and the humidity in the room was always naturally regulated.
Now we don’t have such a source of ventilation, and, therefore, the air humidity is growing all the time. There is always a certain amount of water vapor (humidity) in rooms and at a certain temperature it becomes so thick that it begins to settle on the windows.
Droplets appear on the coldest surface of the room, most often it is glass.
The main sources of indoor moisture that cause our windows to sweat:
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Reason 1. Water in building materials
After repairs, a certain amount of moisture always remains on the wallpaper, plaster and slopes. Therefore, mold and mildew may appear on the walls.
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Reason 2. Human factor
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Reason 3. Pets
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One of the most probable causes why plastic windows sweat can be called high humidity and poor ventilation.
What to do in such a situation? So what are the options for why they sweat? plastic double glazed windows There are several, and there are many ways to solve it:
I propose a solution to the problem in 2 steps:
It is the second step that will allow you to constantly regulate the amount of moisture in the room. How to properly organize ventilation? There are three ways:
| Image | Instructions |
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Long-term ventilation
Leave the sash open all day.
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Intensive
Open all windows wide for 15 minutes. Humid air will be replaced by dry air. In this case, there will be no significant heat loss. |
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Cardinal
Create a maximum draft: open all windows and doors for 5 minutes. |
