How to fix if a plastic window between the panes is foggy - the best solutions

The assembly quality of a double-glazed window for plastic windows affects the comfort during operation of a residential or public space after installation.
If there is a manufacturing defect or mechanical damage to the structure, condensation appears between the glass of the window unit.

Identification of such a problem indicates a serious defect that requires repair and restoration work to avoid a decrease in energy efficiency.

Causes of window fogging

Excessive moisture should be named first. A person himself evaporates about 2–3 liters of water per day. And this is on average under normal conditions. Living plants in pots also produce moisture.

If we talk about an apartment or house, then the microclimate is also affected by using a washing machine, cooking, taking a bath or shower. The relative humidity in residential premises should be in the range of 50-65%.

In connection with the first point, the question arises as to why excess water remains in the room. Apartments and houses usually do not have good ventilation. Fresh air enters there through windows and doors and moisture is removed in the same way. This, as can be seen from practice, is not enough.

Temperature change. People notice condensation on plastic windows mostly during the cold season or in the off-season. Why is that? Condensation is equally affected by both humidity and temperature.

There is such a concept - dew point. This is the temperature at which the vapor contained in the air collects into droplets of water, since the air cannot hold it. The glass surface is the coldest place in the house.

At a sufficiently high relative humidity, when the temperature of the glass inside the room reaches a certain level, it passes the dew point and we get condensation on the windows. A demonstration of this phenomenon can be a glass vessel taken out of the refrigerator - the same processes occur with it.

Another factor that is directly related to temperature is the location of the house according to the cardinal directions. Windows facing north will certainly be colder than those facing south.

Accordingly, the moisture that has already formed on them will evaporate much longer, which means it will have a longer effect on the double-glazed window itself.

How to reduce humidity so that windows don't cry?

Sources of humidity:

• Household: breathing, washing and drying clothes, cooking, wet cleaning, bathing or showering, aquarium, indoor plants, etc.
• Freshly renovated. Humidity after construction and renovation remains in the walls for up to 2 years.

Ways to reduce humidity:

• Dry clothes in the washer/dryer or on the balcony.
• Do not leave boiling pots and kettles unattended, cover them with lids.
• Ventilate after wet cleaning.
• Make sure the ventilation is working properly and clean the ventilation ducts in the bathroom and kitchen.

You can obtain the correct air exchange to create a normal humidity regime through regular forced ventilation, opening windows at least 3-4 times a day for 10-15 minutes, or constantly using various ventilation devices.

Ventilation by opening the windows wide open or even in tilt and turn mode is an inconvenient option; you need to open and close the windows all the time and go to another room.

Manufacturers of window fittings offer a choice of many options for more comfortable ventilation - step or micro-slot ventilation devices. Usually these are additional options that increase the cost of the window.

In the Roto NX* fittings for flaps, micro-ventilation has become a built-in element. There is no need to buy it additionally. During micro-ventilation, the sash is tilted back by 3-5 mm, and ventilation occurs carefully, without drafts or cooling. The sash can be left in the micro-ventilation position for a long time, for example, during cleaning, cooking or overnight.

Photo: micro-ventilation in scissors - a standard position of Roto NX, so that the windows do not cry*, © RotoIf there are no ventilation devices in the window, they can be installed after installation. To do this, you need to contact a window company.

Use any ventilators: built into a window or wall-mounted, manual or automatic. The main thing is to remove humid air from the room, then the windows will cry less.

Why is the window colder than the wall:

• If the glass unit uses ordinary glass without energy-saving coatings. Through such glass, heat escapes to the street, but the glass itself does not heat up.
• Insufficient heating power - lukewarm radiators do not warm the air in the window space. The problem is aggravated by heavy curtains or a window sill that block the radiators, and warm air does not pass to the glass.

Ways to eliminate condensation

Before describing methods of dealing with condensation, a little should be said about the double-glazed windows themselves.
The purchase and installation of two- and three-chamber double-glazed windows, especially in regions with cold climates, will help to a large extent to avoid the appearance of condensed moisture on the windows.

A single-chamber double-glazed window simply will not cope with this task.

Tips and methods:

• Adequate ventilation should be provided. In the absence of a normal room ventilation system, you can do the following: open the windows twice a day for 15–20 minutes. Simple ventilation removes used air along with water vapor and brings in fresh air. Forced ventilation has proven its effectiveness.
• This is a duct system that has fans built into it. If it is available, there is no need for normal ventilation. Even modern ventilation, using humidity and temperature sensors, can regulate the microclimate in various rooms according to your wishes: heat, dry, humidify, etc.
• The next important factor is the finishing of window slopes, window sills and external ebbs while simultaneously insulating them. All together, this makes it possible to reduce heat loss and, accordingly, move the dew point back.
• You should also pay attention to the balcony. It is better to order glazing of the balcony (possibly with single-chamber double-glazed windows) with simultaneous insulation of the floor, walls and ceiling of the balcony. In this case, condensation will certainly not form on the glass inside the room.
• The location of batteries and heating devices is also important. It is advisable that convectors, radiators, radiators are located under the windows and the window sills should not completely block them from above. This will create a constant thermal curtain in front of the windows. Curtains and curtains are also an obstacle to heat loss. You should also be careful with open water surfaces, such as aquariums.
• Don't forget about such little-used items as shutters, blinds and roller shutters. Since an air gap is formed between them and the windows, we get an additional barrier to heat loss. Roller shutters doors, among other things, can perform an aesthetic function, because they are produced according to individual orders and can be painted in different colors, bear photo printing, etc.

Taken together, these methods will help get rid of the unpleasant problem of condensation and even avoid unnecessary spending on heating.

Source: steklandia.ru/poleznoe/problema-kondensata-na-steklopaketah/

How to get rid of condensation using traditional methods

To combat condensation, you can use traditional methods. They are more gentle on the structure itself, but these methods effectively cope with the problem.

Method 1

An old and proven way to deal with “dew” and ice on the window is a candle.

An ordinary wax candle can help in the fight against fogging of windows. It works in the case of double-glazed windows and the formation of frost on the windows. This method has been used for several decades; this method has been used to remove ice from windows. Several candles are placed on the windowsill along its entire length. They warm up the glass and prevent ice from forming.

Many people recommend using thick candles. They burn slower and will last longer. At the same time, with the help of such candles you can “brighten up” the interior of the room a little, making it more comfortable. If desired, candles can be scented.

When a candle burns, it releases carbon dioxide. If there are indoor plants on the windowsill, this can be an excellent feed for them, and you won’t have to remove the flower pots.

Method 2

Properly washed windows will prevent condensation from forming. But for this you need the right solution

Sometimes cleaning your windows properly can help. Depending on the original cause of condensation, sometimes this is enough. Of course, the “success” of such a struggle can be expressed in varying degrees, but sometimes it helps.

For washing you need to use:

• soft, lint-free cloth
• microfiber cloth
• newspapers for wiping
• soap solution
• glycerol
• alcohol (you can use vodka)
• shaving foam
• car window anti-fog spray
• rubber scraper

A window with a fatty layer is most likely to fog up. That is why the “fight” against condensation must begin by cleaning the windows with alcohol.

This will degrease the surface, and the work is carried out as follows:

• first of all, the windows need to be washed in the usual way using a soap solution
• glass must be wiped dry with a lint-free cloth
• remove remaining moisture from the surface using a rubber scraper
• Alcohol is applied to the sponge and the entire surface of the glass unit is treated with it.
• waiting for the window to dry completely

This way, the surface of the window will be completely degreased, which will prevent condensation from forming for some time.

Anti-fog saline solution

The saline solution is applied to a pre-washed window

1 You need to prepare the solution itself. To do this, take 4 liters of water and dissolve 1 tbsp in them. l.

2 Wash the glass in advance with a soap solution , and after it dries, apply the solution evenly.

If there is too much salt, white streaks will remain on the glass after drying. In this case, the entire procedure will have to be repeated from the very beginning.

Glycerin solution

It will be no less effective in case of fogging.

To do this you will need:

1. Alcohol and glycerin are mixed in a ratio of 10/1.
2. The solution is applied to a previously cleaned glass surface and left for some time. After some time, the alcohol will disappear, and the glycerin will remain on the surface of the glass as a protective film.

Potassium oil, glycerin and turpentine

First you need to prepare the solution itself.

To do this, mix:

• 40 g potassium oil
• 4 g pine turpentine
• 20 g glycerin

The mixture will be quite thick, but it must be applied to pre-washed glass using a sponge. Apply the product in an even layer, distributing it over the entire surface. Using a woolen cloth, polish the glass until it shines.

Method with newspaper

Cleaning a window with newspaper

Many generations before us used crumpled newspapers to clean windows. They help to completely clean the glass surface from dirt and soap stains.

At the same time, few people know about the “miraculous” property of printing ink, which gives the treated glass a water-repellent effect:

• wash windows with soapy water
• start polishing them with crumpled newspaper

Chalk

Chalk solution (you can use tooth powder, it must be white), dilute it with water and treat the pre-washed window. After treating the surface, it must be washed to prevent streaks from appearing.

Fighting condensation on plastic windows

Condensation is the most common problem that manufacturers of PVC windows and their consumers have to face.

It should be noted that condensation is not only an unpleasant aesthetic defect, but can also cause dampening of building structures and, as a result, the appearance of mold!

According to standards, the temperature of indoor air in premises should not be lower than +18°C; in a number of regions, Territorial Construction Standards (TSN) have been adopted, which prescribe the temperature of residential premises not lower than +20°C.

If the temperature is below standard, then you need to check the heating system, because this may cause condensation.

Condensation forms primarily at the bottom of the glass unit. Due to convection, cold air accumulates in the lower part between the glasses.

Therefore, the bottom and lower corners of a glass unit are the coldest parts of a modern window structure.

Since the question of the regional zone arises often, the Gosstroy of the Russian Federation gave an explanation on this problem in letter No. 9-28/200 dated March 21, 2002:

1. Condensation in the edge zones on the inner surface of double-glazed windows during the winter period of operation is usually associated with the presence of an aluminum spacer frame in their design and the convection conditions of the gas-air filling.

International standards (ISO, EN standards) allow temporary formation of condensation on the inner glass of a double-glazed window.

But the standards for window units do not normalize the formation of condensation, since this phenomenon depends on a complex of third-party factors: air humidity in the room, design features of the junction points of window units, insufficient air convection along the inner glass (due to a wide window sill, improper installation of heating devices ) and etc.

At the same time, GOST 24866-99 does not allow condensation to form inside the glass unit, which should be considered a significant defect leading to a decrease in standardized performance characteristics.

As for high air humidity, this phenomenon is characterized by the following main reasons:

• Insufficient air exchange due to too tight windows and, as a result, poor performance of exhaust ventilation.
• Increased humidity in building structures due to recently completed construction or renovation work. Building structures retain moisture for one to two years after completion of work!
• Peculiarities of everyday behavior of residents. For example, a greenhouse on the windowsill or drying baby diapers in the kitchen...

New standards SNiP 23-02-03 “THERMAL PROTECTION OF BUILDINGS” have determined the design parameters of the relative humidity of premises to determine the dew point and temperature requirements on the inner surface of windows:

5.9 The relative humidity of internal air to determine the dew point temperature in places of heat-conducting inclusions of enclosing structures, in corners and window slopes, as well as skylights, should be taken:

• for premises of residential buildings, hospitals, dispensaries, outpatient clinics, maternity hospitals, boarding homes for the elderly and disabled, comprehensive children's schools, kindergartens, nurseries, kindergartens (plants) and orphanages - 55%, for premises kitchens - 60%, for bathrooms - 65%, for warm basements and underground areas with communications - 75%;
• for warm attics of residential buildings - 55%;
• for premises of public buildings (except for the above) - 50%.

5.10 The temperature of the inner surface of the structural elements of the glazing of windows of buildings (except for industrial ones) must be not lower than plus 3°C, and of opaque window elements - not lower than the dew point temperature at the design temperature of the outside air in the cold season, for industrial buildings - not lower than zero ° C.

What other errors can lead to condensation? It is necessary to check the room for the presence of a cold surface!

The reasons for the appearance of cold surfaces may be related to resistance to heat transfer and ventilation of structures. They may be as follows:

Errors in window manufacturing:

1. A “cold” double-glazed window with low heat transfer resistance was installed, which does not meet the standards.
2. Violation of clearance tolerances, use of non-standard seals or incorrect installation of hinges are the reasons leading to window blowouts.
3. Non-opening sashes have drainage holes measuring 5x20 mm instead of holes for draining the cavity between the edges of double-glazed windows and the folds of profiles measuring 5x10 or with a diameter of no more than 8 mm.

That is, we are talking about a violation of the provisions of GOST 30674-99, clause 5.9.5 and clause 5.9.6 regarding the system of ventilation and drainage holes. We sent out a letter on this topic, and we want to remind you again: according to GOST, there are drainage holes and there are ventilation holes. These are different types of holes!

In the letter of the Gosstroy of Russia No. 475 dated September 10, 2002, paragraph 2 states that “if the sashes do not open, the dimensions and location of the holes in the lower profile of the frame should not contribute to overcooling of the lower edge of the double-glazed window.”

Confusion in this issue is often associated with terminology: in GOSTs there is no concept of “fixed” glazing or window, but there is the concept of “non-opening sash”!

That is, in the version that in everyday speech we call “a fixed window or glazing” in the terminology of the standards - “non-opening sash”!

Condensation between glasses, what to do

If condensation at the bottom of a plastic window, or along its entire surface on the inside of the window, is a common occurrence, then fogged windows from the inside are much less common. Most often this occurs due to depressurization of the structure.

Condensation inside the glass unit

This may happen for the following reasons:

• The product was released with a defect . This happens when they want to save money when purchasing and buy windows from an untrusted manufacturer. Another reason may be a violation of window manufacturing technology.
• window damage during transportation . If, during transportation of the product, chips or cracks appeared on the window, the gas or compressed air that fills the space between the double-glazed windows could escape. It could also be possible to remove the layer of sealing sealant.
• if the owner of the windows carries out some manipulations with the product , disassembles them and puts them back together, the gas also comes out, and after assembly it was not sealed back. If a glass unit was disassembled, its original properties were lost in 90% of cases

If condensation begins to form between the glasses, the only solution is to completely replace the double-glazed window with a new one. A professional can replace a double-glazed window in just half an hour, but you can do this work yourself. In addition, a new double-glazed window is not expensive at all.

Installation errors

1. Errors when making an assembly seam: incomplete foaming, which reduces heat transfer resistance; poor protection from external climatic influences, which leads to foam blowing or getting wet; absence or poor vapor barrier, which also leads to the insulation getting wet, but with steam from the side of the room.
2. “Cold bridge”, when, due to improper design of the junction unit, the window ends up in a cold, sometimes even negative temperature zone of the wall. This reason often occurs when heavy condensation appears.
3. Blowing through a wall structure, for example, a brick one, through empty seams - “empty space”. This phenomenon can be encountered in houses of the socialist period - the builders did not fill the vertical seams well. But this has also become a problem in new construction with multi-layer walls, when the mineral wool is covered on the outside with brick or other cladding. In this case, the insulation must be ventilated, and when the windows are placed in the plane of the insulation, they may be exposed to cold air from the side of the junction. In this case, during installation, it is better to separate the wall from the junction unit with a layer of foamed polyethylene 6-10 mm thick.
4. A wide window sill prevents the convection of warm air from the radiator in the window opening.

Therefore, we can give the following tips to eliminate the possibility of condensation:

• If, after all, condensation is a consequence of increased air humidity, then this cause must be eliminated due to the increased likelihood of mold appearing in the room.
• To reduce indoor air humidity and move the dew point to lower temperatures, we recommend installing a Regel-Air climate valve or ventilating the room for 10 minutes twice a day.
• Heat losses with such ventilation are insignificant even in winter and amount to no more than 3 degrees.
• The intensity of ventilation of the room must be increased during repair work.
• The window sill should not be very wide and prevent the passage of warm air.
• To allow warm air to pass through to the window, place the curtains at some distance from the window sill.
• Decorative screens on heating radiators should not interfere with the passage of heat flows from the radiators.
• It is necessary to periodically check the exhaust ventilation system in your home or apartment.

One of the most effective ways to combat condensation will be to install a window with a five-chamber “Favorit” system, developed (Germany) specifically for Russia.
The temperature on the inner surface of the profiles directly depends on the heat transfer resistance of the profile system. For example, we can consider two cases - at an external temperature of -26? C and at -31? C (at an internal temperature of +20? C and a relative humidity of 55%).

The dew point will be +10.7?C. Temperatures on the surfaces of a standard binding (three chambers and a width of about 60 mm) and a five-chamber binding with a heat transfer resistance of 0.78 m2? C/W will be as follows:

Source: ashdom.ru/articles/fenstr_1.htm

Anti-fog chemicals

Window cleaner “Sekunda”

Folk remedies do not always help as much as they should, and then you have to look for other ways to combat this problem. Modern household chemicals are another simple way to combat window fogging.

All chemicals that are designed to combat condensation work on the same principle. The composition is applied to the glass surface and left for a certain amount of time (which is indicated on the packaging; this period is different for all products). After this, wipe the window dry using a lint-free rag.

Tested chemicals:

1 "Li-lo." An effective remedy for fogging and freezing of windows. The product is very concentrated, so you must wear gloves when working. You can buy it at most hardware stores. Apply a thin layer of the product to the surface of the glass; for this you can use a dish sponge. After this, you need to treat the surface a second time with the already diluted product. We dilute “Li-lo” with water in a ratio of 10/1. Without washing off the previous layer, apply the diluted product and do not wash off. We are waiting for it to dry completely.

2 "Second". The product is sold in aerosol form, making it much easier to apply. It is evenly sprayed over the surface in several layers. After this, the glass must be thoroughly wiped with newspaper.

Why do plastic windows sweat from the inside and how to fix it?

If a double-glazed window fogs up not from the outside, but between the panes, then there can only be one reason - defective double-glazed windows. This is the manufacturer's fault, since the double-glazed window must be sealed.

This problem can be solved simply - by replacing the double-glazed window (only it, and not the entire window structure - the profile remains the same). The double-glazed window is installed within a few minutes - to do this, the glazing beads are removed.

It is clear that this work must be carried out by specialists. In addition, if you contacted a qualified company, then the replacement of a defective leaking double-glazed window will be free of charge - after all, this defect is covered by a guarantee (it must be stated in the contract).

If the windows constantly fog up, then the culprit may be a single-chamber double-glazed window. Experts generally do not recommend using them in residential areas, since they do not retain heat well enough.

This happens because there is only one layer in the profile, and also because of the minimum distance between the glasses. Savings are not welcome here, especially since the service life of high-quality plastic windows is measured in decades.

Why are the windows crying outside?

A sign of good thermal insulation of a window is that the heat does not escape and “does not warm the street”; the outer glass remains cold. In this regard, the use of heat-saving double-glazed windows with I-glass can lead to windows crying on the street glass.

Photo: this is normal - windows cry from the street side as soon as the surface temperature drops below the dew point, © oknamedia This phenomenon is more often observed in summer and autumn, when it rained during the day and became sharply cold at night. No special measures need to be taken. Windows will stop crying when the glass is heated by the sun.

Reasons for fogging of plastic windows

There can be many reasons why plastic windows sweat from the inside. And to eliminate the problem, you cannot do without identifying the causes. So, the problem may occur due to:

• Increased humidity in the air in the room - for example, when cooking, drying clothes, and so on.
• Air circulation problems in the apartment. If in winter the radiators are only slightly warm, and it is very cold outside, then the plastic windows cannot be heated to the proper extent.
• If the radiators are hot and the windows still fog up, you need to check the window sill - it may turn out that its overhang is too large and blocks the flow of heat to the window area. Protective screens on batteries can also lead to this - because in this way the heat spreading throughout the apartment does not cover the lower part of the window, which is why condensation forms here.
• Lack of high-quality ventilation - it may become clogged or not work at all, so moist air cannot be extracted.
• Plastic windows may fog up if the apartment or balcony is being renovated, or immediately after it is completed. After all, all freshly laid finishing materials (wallpaper and even ceramic tiles) release a large amount of moisture into the room, which will settle on the windows.

Incorrect installation of a plastic window. This means that your windows were installed with a gross violation of technology - poor-quality sealing of the gap between the profile and the window opening.

In addition, the low tide is very often installed incorrectly - it is simply screwed to the window. The ebb should be placed on a pre-prepared mortar base - this will create a sealed layer, protect it from moisture and cold, as well as from noise in case of strong wind.

The window can also be installed out of level - the resulting misalignment leads to the fact that the sealing gaskets of the window sashes do not fit tightly.

Low-quality fittings can also play a role - because of them, the window sashes will not close tightly. Fittings installed in violation of the rules will have the same effect.

Improper performance of work on insulation of external or internal slopes. They definitely need to be insulated and this should be done efficiently.

Foam plastic is suitable as external insulation. You should also use cement mortar - it is used to seal the cracks where the window meets the opening. When working with internal slopes, foam plastic is not used - here preference is given to basalt slabs or glass wool (mineral insulation).

Poor quality seal - then a gap appears between the glass unit and the frame through which cold air passes.

Incorrect adjustment of a plastic window - insufficient fit of the sashes, incorrectly installed fittings, and so on.

Step-by-step instructions for installing a window valve

If the window frame is not equipped with a supply valve, you can install it yourself . To do this you will need (depending on the valve design):

• Electric drill and drills 5-10 mm .
• Jigsaw.
• File.
• Shoe knife.
• Sealant.
• The valve itself.

In addition, you will need a template for marking the frame crossbar .

Procedure:

Step 1. Prepare the necessary tools, as well as components for the valve itself.

Simple valve assembly

Step 2. Attaching the template to the crossbar, draw the outline of the hole for the supply valve.

We define the contour according to the template, in the center of the window

Step 3. Make through holes along the contour, which, using a jigsaw, are connected into a solid rectangular cutout.

Cut a through hole, strictly according to the template

Step 4. Use a file to straighten the edges of the hole.

If the jigsaw file is sharp, the edges will already be quite clean

Step 5: Install the valve mounting strip. It is attached with self-tapping screws to the overlap (quarter) of the window crossbar from the inside.

Installing the valve strip

Step 6. From the outside, install the outer part of the valve, equipped with a visor. Fastening with self-tapping screws and sealant.

The external visor is installed as sound insulation

Step 7. Secure and adjust the inside of the valve.

We complete the valve installation

You should work carefully and without haste, carefully monitoring the condition of the glass unit.

How to eliminate fogging of plastic windows - we solve the problem

To prevent plastic windows from fogging up, a number of preventative measures can be taken. So, if the window is already installed and the problem does not bother you too much, then follow two simple steps:

• Remove all potted indoor plants from the windowsill. Both plants and wet soil provoke condensation.
• Ventilate your apartment regularly, especially if the humidity in it temporarily increases for some reason.

If you are just planning to install a plastic window, then immediately check that all work is carried out carefully and in accordance with the technology:

• choose at least a high-quality 2-chamber double-glazed window, ideally with energy-saving film. The best option is considered to be a vacuum double-glazed window;
• carry out high-quality work on insulating slopes: polyurethane foam is carefully sealed both inside and outside the room, and then a suitable insulation is added;
• the place where the ebb is attached is also covered with cement and insulated with polystyrene foam;
• The area where excess foam protrudes from under the window sill is also carefully plastered - this eliminates the effects of cold in this area.

As for the main recommendations for eliminating condensation on plastic windows, they are as follows:

• if the air temperature outside allows it, then it is advisable to keep the windows in the “ventilation” mode all the time;
• constantly use the hood in the kitchen during cooking, ventilate the premises regularly;
• reduce the width of the window sill or move the radiator away from the wall, install convection grilles in the window sill or drill holes. It may also be necessary to remove decorative grilles;
• check the functionality of the apartment ventilation - a thin sheet of paper should stick to the ventilation grille. If this does not happen, the ventilation system requires cleaning;
• if a defect is found in the design of a metal-plastic window or there are inconsistencies in the technology of its installation, contact the company that carried out the work - their responsibilities include eliminating the inconsistencies;
• regularly check the wear of the fittings - adjustment or replacement of components may be required;
• do not forget to switch metal-plastic windows to winter operating mode. To do this, you will need a hex key - it is inserted into the eccentric at the end of the window and then turned.

As you can see, there are two main reasons why condensation collects on plastic windows - either incorrect work on installing the metal-plastic structure or its defectiveness (wear), or too high humidity in the room.

So if you choose a quality product and ensure proper installation, there is a high probability that the windows will not fog up.

https://www.youtube.com/watch?v=ud08HAQ2LOk

And if you also ensure compliance with the temperature regime and high-quality ventilation of the balcony, then the problem will be completely solved - you will forget about unpleasant streaks on the glass and dampness.

Source: balkonsami.ru/osteklenie/montazh-i-remont/pochemu-plastikovyie-okna-poteyut-iznutri.html

Is it possible to solve the problem of moisture?

The problem of fogging of translucent elements inside a double-glazed window can be solved by completely replacing the double-glazed window . To do this, a new window unit is ordered from the factory, which is installed in place of the dismantled element.

If there is no technical or material possibility of replacing an entire part of 2 or 3 glasses, it is possible to use more gentle methods related to sealing the glass unit around the perimeter or changing the temperature and humidity parameters in the room being used.

Important. Experts do not recommend resorting to simple solutions, since these measures are only temporary. After a certain period of time, the problem occurs again, which will ultimately require window replacement.

When is it impossible without radical methods?

In some cases, the problem cannot be solved by simple repairs , and the owner of the premises is forced to replace the entire double-glazed window or adjacent structural elements:

1. When a double-glazed window delaminates due to a violation of the adhesive bond between the profile and the translucent element along the perimeter.
2. In the case of ice formation between the glass panes with further expansion of the crystallized liquid medium, which causes deformation of the framing aluminum profile of the glass unit.
3. If there are cracks, chips and other defects on the surface of the glass as part of the window block.

Solving the problem without purchasing a new double-glazed window is impossible if there is a manufacturing defect associated with depressurization of the double-glazed window.

In such cases, if the window was installed relatively recently,
experts recommend contacting the manufacturer .
He is obliged to provide a free product with the same dimensions and thermal properties, even if the warranty period for the result of window installation has already expired.

As a rule, when selling double-glazed windows, each manufacturer guarantees at least 25–30 years of flawless operation of their products.

What to do if the windows in your house sweat

So, we found out that windows in a private house sweat for two reasons: humidity and low glass temperature. Accordingly, the struggle for microclimate comes down to increasing temperature and decreasing humidity.

You can increase the glass temperature in the following ways:

1. We replace old windows with plastic 2-chamber windows with energy-saving glass. If plastic windows are already installed, then you can simply replace the double-glazed windows with more energy-efficient ones. (radical but effective way)
2. We dismantle the windows and install them with a shift towards the room. (also radical way)
3. Window sills should not interfere with proper air convection. Make sure that the window sill does not cover the battery by more than 2/3.
4. Make sure that thick curtains do not block the radiators.
5. Raise the temperature in your home.

We fight moisture in the following ways:

1. We check the operation of the hood, if there is one. If there is no hood, then it is better to make one. While there is no hood or it is not working efficiently, you can open the damper in the fireplace - the fireplace draft can partially serve as a hood.
2. Ensure an influx of fresh air by installing supply valves on all window sashes, or turn on micro-ventilation mode in the windows (if available), simply open the window slightly to ventilation mode.
3. Get rid of sources of moisture (get rid of leaks, flowers in pots, aquarium, etc.)
4. Make sure that the interior doors are not airtight and have at least 2-3 cm gaps between the leaf and the floor.
5. Ventilate your home regularly.

We figured out why plastic windows sweat in a private house and how to deal with this phenomenon.

Source: okna-lider.com/pochemu-poteyut-okna-v-chastnom-dome/

What is the problem

What is the problem with foggy windows anyway? In general, condensation appears on windows as a result of a sharp temperature change. Conventional physics can explain this, or rather the transition of a liquid from a gaseous to a liquid state.

When there is a lot of vapor in the air, it turns into liquid when it collides with cold surfaces. The coldest point in the house is the window, so that's where condensation appears.

The windows are foggy from the outside. This situation is extremely rare

Oddly enough, windows can fog up in different ways.

Here are some of the most common scenarios:

• Condensation appears with the onset of cold weather. This situation is the most common; condensation forms when the temperature drops to a certain level. When the air temperature rises, the windows stop sweating
• The windows are sweating in the kitchen. This is natural, because the kitchen is constantly cooking. The temperature in the room is constantly changing, which leads to fogging of the window
• The window only sweats in one room. This problem occurs due to certain features of the room itself, or due to problems directly with this window
• The window only sweats in the morning. Closer to lunch, the condensation completely disappears, and the window remains dry

Plastic windows leak when it rains

If it happens that during rain water flows through plastic windows, and you don’t know what to do. Don’t rush to panic, we will help you fix this problem and tell you why moisture is getting in.

Reasons for window leaks:

• Installation errors. Most likely, even when installing the window, the technology of insulation and sealing of seams was violated and because of this the plastic window is leaking.
• The seal has lost its properties, has become depleted, and has dried out. But this only happens if the sealing rubber has been in use for a long time.
• Incorrectly made slopes.
• There is a small amount of foam in the openings or it is of poor quality.
• The drainage is poorly inserted, or it cannot cope with such a volume of water, or it is completely clogged.
• In addition to the leakage of a plastic window during rain, there is another cause for concern - rubbing and fogging of the glass from the inside, the appearance of condensation.

Reasons for the appearance of moisture inside PVC windows:

• Poor quality glass. Often, unscrupulous manufacturers make it from cheap and low-quality materials; subsequently, the double-glazed window does not fully perform its heat-protective function, the glass freezes and condensation appears.
• Insufficient ventilation. You just need to skillfully use the microventilation mode, ventilate the rooms regularly, 10–15 minutes of ventilation per day will be enough.
• Increased humidity in the house. Especially in the kitchen, while cooking or boiling water.
• Incorrect installation, the window is blown out in places and moisture loss is inevitable in winter.
• If a window leaks during renovation, this is normal, because building materials contain moisture and gradually release dampness to the air.

Why do you need to remove condensate?

Complete sealing of plastic windows can disrupt the natural microclimate in the room. While wooden structures can “breathe,” completely sealed PVC windows prevent natural air circulation.

Condensation is one of the reasons for the appearance of fungus

If condensation forms on the windows, then the microclimate in the room is unfavorable for human health. Because of this, pathogenic bacteria, fungus and mold can develop in the room.

For a person, ideal living conditions are considered to be 20-22 degrees Celsius and 30-45% humidity in the room. Condensation on the windows is the first sign that the atmosphere in the room does not meet these requirements. To return a favorable atmosphere to the room, this problem must be eliminated.

Expert advice

At the end of the material, some advice from experts. When combating window fogging, you must not:

• carry out measures to combat drafts. If everything is closed so that there is no air flow, the humidity in the apartment will increase due to the natural processes occurring in it. More moisture means lower dew point;
• refuse ventilation for fear of lowering the temperature. After ventilation, the temperature will quickly recover, but the moisture will leave;
• use a heat gun to dry rooms in apartment buildings in a new building. If it is nevertheless used, then the ventilation should be very intense, for which it is necessary to open the windows.

From them there are a few simple rules that allow you to eliminate the weakly active process of condensation formation without any costs:

• actively ventilate each room more often - cold winter air contains several times less moisture than room air. By replacing it, the street influx removes a significant amount of water vapor from the apartment;
• constant micro-ventilation reduces air humidity to a level that does not allow moisture in the room to reach the dew point;
• Wall and window valves work effectively against window fogging.

Preventing the appearance of sediment

To prevent condensation from forming inside the glass unit, preventive measures are recommended. In a private house or apartment you can:

• take indoor flowers out of the room or remove them from the windowsill;
• install radiators with a large number of sections;
• warm the room well;
• narrow the window sill;
• make a good hood - without ventilation valves, condensation will form under the window sill;
• insulate the outer wall of the building;
• open the doors for long-term micro-ventilation.

Advice! Regular ventilation will prevent precipitation and normalize the microclimate.

How to prevent condensation when installing PVC systems?

When installing a new double glazed window, it is important to do a few things to eliminate the problem before it occurs.

Using a warm profile

Condensation reactions are not possible with warm glazing. If you are installing PVC blocks, stop at a 4-5 chamber profile 70 mm thick. In a wooden house, you can install profiles made of laminated veneer lumber 78 mm thick. The optimal thickness of aluminum structures with thermal bridges is from 30 to 35 mm.

Installation of low-e glass

Low-emission K- or I-glazed windows will help combat “crying” at the installation stage. The space between the blocks is filled with argon, which prevents the appearance of a dew point.

High quality seals

The edge of a plastic glass unit is most susceptible to fogging and ice formation. To prevent windows from sweating, it is worth installing warm frames made of polymers instead of aluminum in advance.

Adjusting fittings

Try to adjust the fittings and tighten them to cold mode.

High-quality convection

A normal microclimate involves an even distribution of warm layers on top and cold layers on the bottom. See if any heat is coming down from the air conditioner located next to the window opening.

Good seam treatment

It is recommended to foam the joints during installation, and finish and insulate the slopes according to the standards of domestic GOST standards. Carefully seal the foam inside and outside, laying insulation material on top of it. Coat the fastening points of the ebb tides with cement and lay foam plastic on top. Cover areas with excess foam with putty mixture.

On a note! Even minor blowing causes plastic windows to “cry” in winter.