Sealing seams

Why do windows let the cold in? Plastic windows let the cold in: reasons, what to do? Cold from plastic windows.

27.08.2023

The determining factor for replacing old wooden windows with new ones, metal-plastic or PVC, is their ability to retain heat in a house or apartment. Naturally, when installing double-glazed windows, few people were interested in how they would behave in the future. Will the cold be allowed in, is it possible to insulate plastic windows if necessary, and is this necessary? If so, how to prepare windows for winter and the better way to ensure thermal insulation of windows and openings.


A plastic or metal-plastic window, like any composite structure, has weak points. They are the potential “gates” for heat leakage from the room.

Blowing from a plastic window - find and eliminate

Where can it blow from plastic windows?

To understand why it blows from a PVC window, you need to inspect the components, and for this you need to know the design principle of the window unit.

The most common places for blowing:

  • window glazing bead (glass unit holder);
  • rubber compressor;
  • window fittings (for example, blowing from under the hinges, into the handle);
  • the perimeter of the window frame - the junction of the slopes, window sill, walls.

How to determine where it is blowing from a plastic window?

The presence of a defect in one of the components of the window unit leads to blowing from plastic windows. There are three ways to determine the exact location of heat loss from metal-plastic windows:

  • tactile hand. To identify a gap, just run your palm over the surface of the window block;
  • lighter. The search procedure is similar to the previous one, but the light is more sensitive to drafts and can detect even the weakest blowing.
  • paper. A regular sheet of paper is pressed against the window (put into the open window and clamped by completely closing the sash), if you pull the corner of the sheet and it easily pulls out, then the seal is not pressed enough (this may indicate that the old seal is not pressed well against the frame in this mode) .

Why does it blow from plastic windows - reasons for heat loss

  • installation error. This is the most common reason associated with ignorance or non-compliance with the correct technology for installing a plastic window. 15 years ago, this service was so in demand that everyone who had at least some idea about installing window units became installers. Naturally, few people installed PVC windows according to GOST;
  • window distortion due to shrinkage of the house. A pressing problem for residents of new buildings and wooden houses;
  • an attempt to save money. One of the weighty arguments in competition is always price, especially during an economic crisis. The price reduction often occurred at the expense of quality: saving on foam, on insulation, ignoring the need to protect the heat insulator, using low-quality components when assembling windows - all this over time led to the fact that the consumer is forced to change or additionally insulate PVC windows;
  • physical wear of window components, in particular sealing rubber bands, or weakening of the pressing force of the sashes;
  • violation of the operating rules for plastic windows, which include the need to wash the window seal and treat it with glycerin. This care prevents the seal from losing its elasticity and cracking.

What to do if it's blowing from a plastic window

Of course, eliminate the source of the draft. From a practical point of view, there are two simple options - call a specialist to repair and adjust (expensive) windows or do it yourself (cheap).

The desire to seal all the cracks yourself using improvised means is nullified because: firstly, it is not aesthetically pleasing, and secondly, there are no guarantees.

When is it advisable to hire professionals:

  • The plastic window was recently installed. The installer company is responsible to the consumer for the reliable operation of the windows (if the warranty covers this period);
  • the window opening is located at a considerable height (in a multi-story building). It is better to entrust any high-altitude work to professionals (industrial mountaineering services). If the window is located on the second floor or higher, the work will be associated with increased risk;
  • if there is a manufacturing defect. For example, obvious manufacturing or installation defects that appeared during the warranty period;
  • if necessary, replace parts. It is better to install “original” fittings if it is necessary to replace individual elements of the window unit;
  • work is carried out in winter. Knowledge of installation technology and how to insulate plastic windows for the winter allows installers to complete the work quickly, without significantly cooling the living space.

However, often, the cost of hiring specialists is equal to the cost of installing a new window, and this fact makes it more profitable to do the insulation work yourself.

What you can do yourself:

  • internal insulation of the window opening;
  • insulation of the frame contour;
  • window sill insulation;
  • replacement of seals.

How to insulate plastic windows with your own hands

When to insulate windows for the winter

Repairs and insulation must be carried out before the onset of cold weather. This is due to the following requirements:

  • more comfortable working conditions;
  • material requirements. Some building materials, such as dry mixes and sealants, can only be used in a certain temperature range. Otherwise, they lose their characteristics;
  • optimal humidity;
  • no draft;
  • the ability to simultaneously perform internal and external insulation;
  • reducing the risk of catching a cold among apartment residents.

How to insulate plastic windows at home

The choice of insulation depends on the location of the blower.

1. Insulation of window openings for the winter

To insulate a window opening, you can use different materials and methods:

  • polyurethane foam. As the foam expands, it fills all the voids around the perimeter of the window opening, preventing air movement. Due to the fact that foam is 90% air, it is an ideal insulation material. However, the foam needs protection from ultraviolet radiation, high and low temperatures. This means that it is not advisable to use it by itself;
  • mineral wool. An excellent thermal insulation material for insulating window sills and internal slopes. Cotton wool has a more limited range of uses when insulating windows;
  • polystyrene foam/expanded polystyrene. Used for insulating slopes of plastic windows;

Note. Rigid insulation is used when the thickness of the installation seam is no more than 3 mm; in other cases, it is better to give preference to mineral wool.

  • silicone sealant. A reliable way to eliminate air leaks between plastic window elements;
  • dry mixtures for finishing slopes, used if necessary to insulate the window from the outside;
  • construction tape. Glues on top of the sealant or instead of it;

Advice. It is not recommended to use ordinary masking or window tape; after sticking it, unattractive marks remain on the plastic of the window frame that are difficult to remove without damaging the front covering.

2. Insulation of the window block

  • seal;
  • construction tape;
  • sealant;
  • heat-saving film for windows (energy-saving);
  • mechanical methods of insulation, for example, tightening (adjusting) fittings.

After the question of how to insulate has been resolved, we will deal with the question of how to insulate a double-glazed window, frame, plastic, aluminum profile, etc.

How to insulate plastic windows from the outside

External window insulation is carried out in the following areas:

1. Insulation of slopes of plastic windows

The first step to increasing the thermal insulation properties of the window. No matter what insulation measures are taken in the house, until the slopes from the street are insulated, the cold will still flow inside. At the same time, external insulation allows you to shift the dew point, which will prevent the appearance of dampness and the development of fungus. Covering the cracks is a temporary measure, because... Over time, the layer of plaster will begin to crack and expose the mounting foam, which will collapse under the influence of atmospheric conditions. But as protection for insulation, plaster is an excellent solution.

How to insulate the slopes of plastic windows from the street

Work order:

  • preparation of material (rigid insulation);
  • cleaning slopes from dirt and protruding parts;
  • surface primer;
  • installation of insulation on an adhesive solution or special adhesive foam. It is preferable to use foam because it eliminates wet work, has a minimum setting time, and holds the insulation sheet more securely;
  • sealing all cracks with glue;
  • installation of perforated corners;
  • installation of polymer mesh;
  • finishing with plaster.

Advice. When installing insulation, you need to make sure that it covers part of the window frame and completely covers the installation seam.

2. Insulation of plastic window sills

To insulate the ebbs, it is enough to foam all the cracks or place heat-insulating material in them. To avoid water getting on the heat-insulating material, a metal strip of window sill is installed on top. The plank is installed at an angle (at least 5°), its horizontal edge extends from the facade (by 20-30 mm), and the side edges are turned up. It is recommended to treat the area where the plank joins the surfaces with sealant.

Internal insulation of plastic windows

Insulation of windows from inside the room is carried out in the following areas:

1. Insulation of internal slopes of plastic windows

Internal slopes are less susceptible to the influence of external factors, but put forward more demands on the aesthetic component. Therefore, it is important to know how to insulate the slopes of plastic windows without losing the attractiveness of the window.

Work order:

  • treatment of cracks: removal of dirt, removal of old foam, falling parts, etc.;
  • applying a primer;
  • sealing cracks with foam;
  • removing excess foam after it dries;
  • installation of thermal insulation materials (foam or cotton wool);
  • installation of drywall;
  • finishing drywall with putty and paint.

2. Insulation of the window sill of plastic windows

The gaps between the wall and the window sill are one of the places of significant heat loss. Before deciding how to insulate the window sill of a plastic window, you need to determine its weak point, i.e. where is it blowing from? For example, blowing is possible between the plastic parts of the window and window sill. In this case, it is recommended to use a sealant.

Heat loss between the window sill and the wall is also possible. In this case, insulation is carried out before installing the window sill by laying a layer of heat-insulating material. And also after its installation - by foaming the distance between the window sill and the concrete wall or brickwork.

3. Insulation by adjusting the plastic window

Elimination of distortion of the PVC window sash

To reduce heat loss, you need to adjust the fittings (components) of the window unit.

How to adjust plastic windows for the winter - video

Replacing the seal in plastic windows

Elimination of blowing of plastic windows is possible by replacing the rubber seal. You can change the seal yourself, everything is simple - just pull out the old seal and insert a new one into the groove (groove).

Which seal is better? Please note that there are window insulation in black and gray colors on the market. The black seal is more flexible, but the attractive light color is due to various additives that reduce the cost of the window seal and at the same time worsen its properties (pressure tightness).

Replacing the seal in plastic windows - video

Additional ways to insulate plastic windows

  1. Washing windows. Paradoxically, cleaning the glass unit helps save heat. After all, dirty glass loses its ability to transmit sunlight, but continues to transmit rays in the infrared spectrum.

  2. Thick curtains. Which also trap heat indoors.

  3. Insulating windows with improvised means. This method somewhat spoils the appearance of the window, but in critical cases it can be a very worthy alternative to replacing the window unit. The following materials are used as insulation: foam rubber, soaked paper, window tape, strips of white fabric, etc.

  4. Insulation of windows with heat-saving film. The energy-saving film is glued to the entire surface of the window (on the sashes). The main thing is to do the gluing correctly, without air bubbles or folds. The film reduces heat loss through glass by 75%.

  5. Electric window heating. In this case, a heating cable is placed around the window, which heats the heating coil, or an oil radiator is installed on the window.

  6. Electric heating of double-glazed windows. The most technologically advanced way is to install plastic windows with heated glass. The technology is applied at the window production stage. It involves installing a special conductive film (transparent film with conductive threads) on the inside of the glass, which heats the glass from the inside.

  7. A complex approach. The most appropriate for insulating windows in an apartment or private house, since it allows you to eliminate all possible causes of heat leakage through metal-plastic or PVC windows.

Insulation of window glass with energy-saving film - video

Conclusion

Insulating windows often negatively affects ventilation in the room. Complete tightness is protection from the cold, but it also causes fogging of the glass, which leads to the destruction of slopes and the appearance of fungus. The problem is solved by periodically ventilating the room, micro-ventilation, installing forced ventilation, etc.

Modern plastic windows do not let cold air, noise and dust into the house, and also retain heat indoors. When installed correctly, they reliably protect the house from external influences.

But sometimes windows lose their positive properties, and noise and drafts enter the house. I recently talked about why double-glazed windows allow sounds and sounds to pass through.

Today we’ll talk about thermal insulation and find out why windows let the cold in.

Where is it blowing from? Three weak points of the window

To understand why windows let cold in, you need to identify the places through which drafts pass. The window has three vulnerable positions:

  • accessories;
  • the place where the frame meets the window sill;
  • the gap between the side slope and the frame.

If cold air enters through a loose clamp, look for the cause in the locking elements around the perimeter of the window. To avoid this problem, some companies (including Kaleva) offer an expanded set of fittings with an increased number of locking points.

Another reason for drafts is insufficient pressure of the seal to the sash. In winter, the plastic shrinks in volume and the seal may dry out. This affects the tightness of the sash rebate to the frame and prevents the fittings from functioning correctly.

Often in this case it is possible. For example, if the hinges sag and the sash moves. If the problem is with the seal, it can be replaced. However, in both cases, it is better to contact specialists.

If there is air blowing in the area where the frame meets the window sill or in the gap between the side slope and the frame, then most likely it is due to poor-quality installation. Make sure that the specialists have used enough mounting foam and special mounting tapes (in accordance with GOST). Otherwise, the structure will settle and drafts will appear.

The main thing is to notice the result of such unscrupulous work during the warranty period. The installation company will be required to correct this defect and either reinstall the window completely or re-seal the seams.

The windows let the cold in. What to do?

Let's summarize. Most often, windows allow cold to pass through for two reasons: poor performance of the fittings or unscrupulous installation. To solve problems in both cases, it is better to contact specialists. What they can do:

  • adjust or replace fittings;
  • re-seal the seams;
  • completely reinstall the window if the installation was performed poorly the first time.

You can solve some problems yourself. For example, adjust window fittings. Before calling a specialist, we also advise you to wash the rubber seal. It is possible that dust and street dirt reduced its tightness and the window began to let in cold air.

Do not forget that thermal insulation and cold transmission also depend on the design. Check out our Kaleva Deco. It retains 69% more heat than regular ones.

Have you ever experienced that your windows let in the cold? If yes, how did you solve this problem? Tell your stories in the comments and on our blog so you don’t miss interesting articles about quality windows.

Sincerely,

This question really worries many people now!

We answer in detail:

This is a normal situation! Glass cannot be warm, it is not a heater, it does not heat up itself, and heat loss through it occurs constantly (up to 25% of all heat loss in the house). And there is no escape from this!

From the physics course we know that any material has a coefficient of resistance to heat transfer.

Heat losses in the house mainly depend on:

1. Temperature differences in the house and outside (the greater the difference, the higher the losses),

2. Thermal insulation properties of walls, windows, ceilings, coatings or, as they say, enclosing structures.

So, the main task is to maximize the coefficient of resistance of glass in plastic windows and reduce heat loss.

To do this, they first came up with a double-glazed window, with a different number of cameras http://www.plastika-okon.ru/glasspackets.php. It is clear that in this case, heat loss has become less due to the number of glasses, their thickness and the air gap between them.

But this is not the limit!

The next step was to use one of the glasses with a selective coating (i-glass) in the double-glazed unit, which is capable of reflecting heat waves into the room and at the same time transmitting solar thermal radiation outside. However, its use in sealed plastic windows often leads to discomfort in summer. Solar radiation penetrates the house, and most of it remains indoors, you understand what happens. http://www.plastika-okon.ru/news/item/205.php

And then progress gave us multifunctional glass, currently one of the most advanced inventions in the window industry.

It works in two directions. Its inner layer reflects heat back into the room, and its outer layer reflects solar radiation back to the street, which creates an optimal indoor microclimate.

And now attention, some good tips for improving thermal comfort conditions in your home
(what if you haven’t installed a heating package yet or, it’s scary to think, you still haven’t replaced your old, cracked wooden windows with brand new plastic ones).

1 We increase the temperature of the inner surface of the window by blowing warm air through the glass unit.

We create rising jets of warm air - we drill holes in the window sill board, insert convection grilles into the holes. Heated air rises, this allows you to increase the temperature of the glass and reduces the influence of cold air entering through the window

2. We insulate the wall located under the window behind the heating device. On top of the thermal insulation we make a screen of shiny aluminum foil, reflecting the heat emitted by the battery into the room. Nice and warm.

3. We hang blinds on the windows. Yes, yes, they also have a heat transfer resistance coefficient.

It’s cold from the windows not only in the old “khrushchev”, but - much more often - in a modern office or expensive housing with panoramic windows. There are no cracks, the fittings are in good working order, the glazing is the most modern: then why do good wooden and plastic windows let the cold in? Let's understand the reasons.

What is radiation temperature and what should it be?

Regulatory documents provide the basic parameters of comfort and microclimate in habitable premises, in which a person feels good and can stay without harm to health. Almost everyone knows about such parameters as temperature, relative humidity and air speed (draft) in the area where people are located. Much less frequently mentioned is another factor that influences human sensations—radiation temperature. This has nothing to do with radiation from nuclear power plants. According to GOST 30494-2011 “Indoor microclimate parameters”, the radiation temperature of a room is the area-averaged temperature of the internal surfaces of room enclosures and heating devices. That is, the resulting room temperature is normalized - a complex indicator of the radiation temperature of the room and the air temperature in the room.

Why do plastic windows feel cold?

Typically, cold air enters through discontinuities (cracks) in the window structure. Even modern windows with double-glazed windows are not completely airtight, and some cold air still enters through them. The standards limit this intake to 5-6 kg of air/sq.m. Blowing in winter is especially important for PVC windows, which change their geometry in severe frosts due to the high coefficient of linear thermal expansion. Even a slight blowing in winter can lead to a draft and low temperature in the window area. And then the question arises: why does the plastic window blow cold.

How to deal with this?

Proper manufacturing and installation of windows, well-adjusted fittings, and high-quality frost-resistant seals reduce the risk of blowing to a minimum. And the question “why do windows let the cold in” simply won’t arise. Therefore, the first thing to start with is checking the quality of fittings and seals. There is also a “false blowing” - a person actually feels with his hand at the edge of the window sill that the cold is coming from the window into the room. But this has nothing to do with direct ventilation and sealing the window will not help here.

The fact is that the inner surface of a window (including a plastic one) in winter is always colder than the inner surface of the outer wall. The temperature of the inner surface of the enclosing surface is determined by the external temperature, the internal air temperature and the heat transfer resistance.

Typically, in modern buildings, a plastic window is several times colder than the wall, and their heat transfer resistance is 0.55...0.75 degrees. sq.m./W and 3.0….3.5 degrees. sq.m./W respectively. This leads to the fact that in frosts of about -20 degrees, the central zone of the double-glazed windows is cooled to about +10 degrees (the edge zones - down to 0 degrees), forcing us to wonder: why is there cold from the windows and what to do.

The windows in the apartment are new, but it’s cold next to them - what to do?

Cooling upon contact with the glass unit, the room air slides down, rests against the window sill and is directed into the room, creating the feeling of a draft. This can be combated by increasing the surface temperature of the glass unit - using low-emissivity glasses and noble gases (argon and krypton) in the space between the glasses. Perhaps it is in your region that the winters are quite harsh and the installation of not ordinary, but energy-efficient windows is indicated.

An example in the photo is a house in Novosibirsk. There is no heat loss through the windows: a warm profile with triple glazing is used. The glass is covered with a film on top, which prevents heat from escaping from the room in winter and overheating in hot weather. Tinted glass appears to have a deeper blue color.

Does your window have a quarter window?

A quarter is a protrusion of 1/4 of a brick on the outside of the opening (it protects the frame from falling out, and the foam from sunlight). Not all windows have a quarter, and depending on its presence or absence, the technology for installing windows in the opening differs. In other words, you may have a new window, but the installers made a mistake during installation. This sometimes happens when there are thick walls - and you feel the cold from the window. Check the positioning of the window block plane in the opening. In a homogeneous wall (brick, foam concrete) in an opening with an outer quarter, it is recommended to place the window block at a distance of 1/3 of the wall thickness from the outer plane of the wall. In openings without a quarter, it is better to place the window block in the middle of the wall thickness. Perhaps it is in the incorrect installation that the answer to the question lies: why do windows let the cold in?

Advice: Increasing the temperature of the internal glass can be achieved by installing special air ducts through which warm air from the heating device through the window sill is supplied directly to the bottom of the window block. I heard a funny story about a cat who got a cold from his “dignity” simply because he slept on the windowsill in winter: there was a constant draft of cold from the window, although the radiator was “frying” from below - and the poor animal was very warm. The story ended with a happy ending, albeit after a course of antibiotics. Let's move from extremes to familiar examples: instead of a sleeping cat, a child is studying at the window-sill-tabletop. The fact that the radiator “fries” him in the lap does not make the window warm at all - it still feels cold. The glass will be heated only in one case - if the air ducts are routed directly to the frame (example in the photo).

No less important

Correct relative geometry of the window sill and the heating device: the window sill should not block the flow of warm air from the heating device. Correct installation of decorative screens under the window. They should not interfere with the heating device heating the window (free air flow to the device from the floor level and free exit of warm air upwards). The correct geometry of curtains and curtains - they should not block the flow of warm air (do not touch the floor or the edge of the window sill).

Reduced radiation temperature near the window - what to do?

Typically, the ratio of window area to room floor area is 1 to 6...8. In the center of the room, a person is, roughly speaking, surrounded by warm walls, the window is small and quite far away. But in modern houses the ratio of glazing to floor area can be 1 to 2. That is. In winter, indoors, especially near a window, a person is surrounded by fairly cool surfaces, which can cause discomfort.

If it blows from plastic windows, what should you do? Many people face a similar problem. They begin to feel the cold air currents coming from the plastic windows. Although it is believed that PVC windows are characterized by their tightness and should not allow air to pass through, such a problem exists. This becomes especially noticeable in the cold season, when the temperature regime in the apartment is of particular importance, since it becomes cold outside and warmth inside the room is necessary.

What to do?

If it blows from plastic windows, what should you do? If the windows were installed a short time ago, you should contact the organization that provided installation services. As a rule, companies that provide such services provide guarantees to their clients. Therefore, if the warranty period has not yet expired, it is recommended to contact the company that installed the windows. Then its employees must eliminate the shortcomings in their work.

If there is no warranty for the windows or it has expired, you can find out the reason for the blowing from the plastic windows yourself. Or contact a specialized company that repairs window systems.

In order to decide whether to repair windows yourself or contact a company, you should understand the reason. If it is insignificant, then you can get rid of the problem of blowing through window systems yourself.

Where does the air leak?

Before talking about the reasons why it can blow from plastic windows, it is worth determining where the windows allow air to pass through. To do this, you will need tools such as a candle or a regular lighter. Using these items, you should determine from which places the air passes through the window.

There are certain safety rules that must be followed when working with fire. Firstly, you don't need to bring a candle or lighter close to the plastic. This is due to the fact that the plastic may begin to deform when exposed to fire. Secondly, a person must ensure his safety when working with fire. Namely, avoid contact of the flame and the skin. When testing the passage of air through plastic windows, you need to run your hand along the frame and feel the air flow. Particular attention should be paid to the joints of the frame with the slopes and the window sill. In addition, you need to check whether air is passing through where the window fasteners and hinges are located.

Causes

Why does it blow from plastic windows? What to do? Note that there are several main reasons for the problem. We will list them below. So, why does it blow through plastic windows (you will soon find out what to do)?

  1. The window may not be adjusted correctly. In this case, air enters the room through the sash. As a rule, there are two types of window adjustments: summer and winter options. If the window is adjusted in the summer mode, then in frosty weather cold air will enter the apartment or house, thereby causing discomfort to the residents of the house or apartment.
  2. Marriage. If it blows from the slopes of plastic windows, what should you do? Another reason may be a defect that was made in production. This includes a poorly manufactured profile, namely a violation in the reinforcement process. In addition, there may be damage to the glass unit. The plastic itself may be of poor quality. That is, the material does not meet the required standards. In this case, the plastic may not withstand temperature changes in regions with harsh climates.
  3. The cause of air leakage may be poor fittings. Therefore, it is recommended to choose high-quality fittings in order to avoid problems with windows in the future. The quality of use is also affected by the insulation; you should not skimp on it either.
  4. Window installation is of particular importance. Installation must be carried out by professional specialists with experience. Since a violation of the structure can lead to blowing from the windows.
  5. The number of double-glazed windows affects the quality of the window. It is determined by the climatic characteristics of the region. The colder the climate, the more double-glazed windows should be installed.

You should know that the complete absence of air passage through plastic windows is also not very good. Since in this case a greenhouse effect may occur. Air circulation must be present. If it is not there, the windows will begin to leak. Therefore, professional window adjustment is required. We will talk about it further.

How to adjust plastic windows?

As mentioned above, there are two modes for adjusting plastic windows, namely summer and winter options. The first option assumes the presence of a micro-ventilation mode in the adjustment. This is necessary to ensure that the room has a favorable microclimate. The winter option involves a tight fit of the window sash to the frame. This reduces the air flow into the room.

If it is determined that air enters the room along the entire perimeter of the sash, this means that the mode should be changed from winter to summer. In order to carry out this process yourself, you should understand how the window structure is made. There are clamps around the entire perimeter of the window. They ensure that the sash fits tightly to the window frame.

Switching between modes

In order to ensure a tighter fit of the sash to the frame in winter, you should turn the internal clamping mechanism as far as possible to the right clockwise.

For summer mode, this procedure should be carried out in the opposite direction. The important point is that all internal clamp mechanisms are adjusted equally. If this action is violated, the window frame may break. It should be said that if there are doubts about the correctness of carrying out these actions on your own, then it is better to turn to professionals.

You should also know that there is an automatic window transition from summer to winter mode and vice versa. In this case, the mode is introduced by the manufacturers into the fittings. Thus, switching the window to the desired mode will not be difficult.

Loop area

If it blows from plastic windows, what should you do when it comes from the hinge area? If it is discovered that cold air is coming from the hinge area, then this mechanism should be examined. The fact is that there are several elements located there that can cause this problem.

So what should you do if it blows from the hinges of plastic windows? What to do in this case? The most common reason for air passage in this area is the presence of mosquito net fastening elements on the outside. In this case, a sealing process should be carried out. Then cold air will stop flowing into the room.

Also, the reason for the entry of cold air into the room is fittings that do not meet quality standards. Or the window installation was carried out poorly. If the reason for the penetration of cold air into the room is due to unscrupulous installation, then you should call a specialist. He will adjust the fittings and eliminate the source of cold air entering the room.

If the fittings do not meet quality standards, they must be replaced. It is better not to save on this parameter initially, but to buy a window with high-quality fittings.

Blowing from under the windowsill

We figured out why it is blowing from under the plastic windows. What to do if it blows from the window sill area? If during the inspection it was revealed that cold air flows are coming from below, from the area where the window sill is located, this may mean that there is no sealing. When installing a window, the distance between the lower frame and the window sill is filled with foam. If air is blowing, then there are holes.

What to do if it is blowing from below a plastic window, what should you do? It is recommended to putty the foam to avoid exposure to the external environment. You can fix poor-quality installation yourself using a sealant. If it does not give the desired results, you should remove the window sill and correct the defects from the inside.

Finally

Now you know why it blows from plastic windows and what to do in this case. We hope that this information was useful to you.