What to do if a plastic window lets in the cold. Blowing from plastic windows

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?

IN regulatory documents The main parameters of comfort and microclimate in inhabited premises are given, in which a person feels good and can stay without harm to health. Almost everyone knows about such parameters as temperature, relative humidity and the speed of air movement (draft) in the area where people are located. Much less often mentioned is another factor that influences human sensations - radiation temperature. To radiation nuclear power plants this has nothing to do with it. According to GOST 30494-2011 “Indoor microclimate parameters”, the radiation temperature of a room is the area-averaged temperature of the internal surfaces of the room’s 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 window design. Even modern windows with double-glazed windows are not completely sealed, and some flow of cold air through them still occurs. The standards limit this intake to 5-6 kg of air/sq.m. Blowing in winter is especially important for PVC windows that change their geometry in very coldy because of high coefficient 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 plastic) in winter is always colder than the inner surface 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.
Usually in modern buildings there is a plastic window colder than the wall several times, 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 double-glazed windows is cooled to approximately +10 degrees (edge ​​zones - down to 0 degrees), forcing us to ask the question: why it's getting 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 glass 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 glazed windows. The glass is covered with a film on top, which prevents heat from leaving the room in winter and prevents it from 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 with outside opening (it protects the frame from falling out, the foam from sun rays). 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 window unit It is recommended to place it 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 not correct installation lies the answer to the question: 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.
Heard Funny case about a cat who caught 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 warm air from a heating device. Correct installation 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 warm walls, the window is small and far enough away. But in modern houses The ratio of glazing to floor area may turn out to 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.
The room as a whole (due to a general increase in air temperature) may be warm - the resulting temperature is formally within normal limits. But at the same time it will be uncomfortable to be near the window. This is especially true with panoramic glazing and in general with large area windows - this situation often occurs in extensions (solid glazing). And here we are not just talking about a greenhouse-style extension to old mansion- You can personally experience the unpleasant cold if you go down to a cafe during your lunch break.

What can you do to make the window warmer?

For the most determined - replace plastic windows in the house: increase the temperature of the internal glass. Solutions can be very different - use low-emissivity glass, noble gases in the inter-glass space, thermal mirror double-glazed windows, electrically heated double-glazed windows. If you have panoramic windows and have absolutely no desire to change them, floor-mounted convectors around the perimeter will help panoramic glazing(fighting cold air convection and heating the glass, taking into account possible thermal shock). If you don’t want to start a “construction project”, but the cold is drawn from the window, use IR emitters to compensate for the low radiation temperature in the window zone.

If it is cold from the window on the attached loggia - what to do?

To begin with, at a minimum, move deeper into the room workplace and a bed, at least for the winter. If this is not possible, you will have to invest in the technologies described earlier (replacing double-glazed windows, installing additional heating devices).

The question that we will raise today in our publication begins to worry owners of plastic windows with the arrival of winter. We are talking about why the windows are cold? This problem is typical for wooden windows With ordinary glasses. But double-glazed windows should not be cold.

Another reason that the glass surface in a room is cold is the lack of proper organized system heating. Heating radiator must be under the window, it is desirable that the battery temperature is above 60 degrees. And there is another very important point– the window sill should not block the flow of warm air.

The problem of cold windows does not come alone. If the surface of the glass unit has enough low temperature, then the dew point will shift inside the room. As a result, condensation will begin to form on the windows, which, in turn, will lead to excess moisture and the appearance of mold and mildew. Read more about the reasons for the appearance of condensation on windows.

Some clients call us and ask: “Why is there a cold window sill next to a plastic window?” Most likely the reason is due to installation errors. When installing the window sill, the support profile was not properly insulated. The space under the window sill was filled with foam by an inexperienced craftsman. Cold bridges have formed, through which the cold from the street penetrates into the room. As a result, not only does the window sill cool, but serious heat loss also occurs.

How to fix the problem of cold windows

If you want to get rid of cold windows once and for all, you need to contact the specialists of the Teplo Doma company. The wizard will determine the root cause and offer you options for solving the problem. Of course, you can do everything yourself, but this will require knowledge and skill.

For example, if a double-glazed window is selected incorrectly, it needs to be replaced. If it is blowing from the window, adjustment may be required. Also, do not forget that there may be a draft from the window due to improper installation.

Order window repair in Moscow

The Teplo Doma company offers you to solve the problem of cold windows quickly and inexpensively. We are able to find optimal solution in each specific case. Our company has been servicing windows for over 15 years. Our specialists know everything about metal-plastic structures and a little more.

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 technicians have used enough polyurethane 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: bad job fittings or improper 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 specialists, we also advise you to rinse rubber compressor. 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 out. interesting articles about quality windows.

Sincerely,

Blowing through window units can be caused by a variety of reasons: from broken sash seals to improper installation of the product. In most cases, you can solve the problem yourself by adjusting the locking mechanisms. Some faults can only be eliminated by repairing or even replacing the unit.

The most common causes of blowing windows:

• the sash may not fit tightly to the frame. To eliminate a draft in this case, simply adjust the window fittings. The main thing you need to understand is that it is not recommended to do this setup yourself, especially if you have no experience. Most effective option- call a specialist from a window company;
• to increase service life sealing rubber bands, the design of the fittings provides two modes - summer and winter. In the warm season, the clamp should be loosened, thus increasing the inflow fresh air to the house. IN winter months Accordingly, it is necessary to increase the tightness of the sash. You can adjust the fittings according to the time of year yourself;
• poor-quality window installation is the most serious reason blowing through the window block. Incorrect installation of the product or poor-quality construction of the seam or slopes cause drafts that cannot be eliminated by adjusting the fittings or changing the seals. Major window repairs or even reinstallation will be required;
• the presence of voids under the tide can also cause the window unit to blow out. It is not difficult to fix this problem. It is enough to raise the ebb and fill the voids with polyurethane foam.

It is worth noting that the reasons for drafts listed above are more common in recently installed products. If the window has been in use for a long time, and you are just now experiencing blowing, then the following problems are possible:

• sash sagging. Over time, the sashes can sag under their own weight, thereby disrupting the tight fit to the frame. This defect can be eliminated by adjusting the window fittings;
• incorrect installation assembly seam. In such windows the foam sticks out from outside block and under the influence of UV rays gradually collapses, forming voids. In this case, it is possible not only to blow through the window, but also to freeze the seams, window sills, and slopes;
• violation of the elasticity of the sealing gum. For seals to last a long time, they must be treated silicone grease Twice a year. However, even regular care of rubber bands does not help when they are made of cheap materials. If you notice that the seals are drying out, contact your window company to replace them.

There are a number of other reasons for blowing, which only specialists can identify and eliminate.

When will it be needed?

In most cases, if the window begins to let in cold, the problem can be solved without resorting to complex repairs. For example, when a draft appears due to a malfunction in the opening/closing mechanism of the sash, loose pressing against the frame, sagging of the moving part, or cracks in the seal. All these defects lead to the penetration of cold into the room. The adjustment is made in the following way:

• replace the seal;
• carry out debugging of the movement of the handle;
• ensure tightness of joints and restore the tightness of the sash;
• restore the functionality of the tilt and turn mechanism;
• adjust the locking mechanism;
• correct installation errors;
• install ventilation devices.

Repair is a more complex and expensive operation; it is performed when there is serious damage. For example, if the window profile is bent or the glass unit is cracked.

Recently, plastic windows have become increasingly popular and have pushed their wooden counterparts from the first positions. All this happens due to the fact that they are more convenient to use and practically do not allow frost to pass through due to their tightness. Another huge advantage of such windows is their long service life. But what to do if the plastic window lets in the cold?

About the article:

Causes

It must be remembered that in addition to all the advantages, they have a couple of disadvantages. Most quality profile may allow frosty air to pass through if not installed correctly. Even made from very expensive materials The window may let in cold for some reason.

Loose fit of the sashes to the frame

In most cases, during the manufacture of plastic windows, the smallest clamp is installed. In the warm season, this disadvantage is not so noticeable, but in winter it will lead to the passage of cold into the room and the formation of a draft. In order to find out how tightly the sash fits to the frame, you need to take a lit candle or match and pass it around all the sash. If you see that the fire fluctuates, then it is necessary to strengthen the tightness of the seal.

Old rubber seal

This is one of the most common sources of cold transmission. What to do in such a situation? It is best to replace the seal with another, whiter one. High Quality. This will help not only strengthen the profile, but also extend its service life. You can make such a replacement yourself or contact the installation service for help. plastic structures. If you decide to carry out this process yourself, then follow these tips:

• It is best to purchase a good seal that will last you a long time (pay attention to German manufacturers);
• Using pliers, pull out the old rubber;
• Remove all dirt from the grooves;
• Install another seal.

Slopes

Then, when it blows from the wall, then the whole reason is in them. Try to remove this flaw as quickly as possible. Mold and mildew will form on such slopes over time, and it will be very difficult to eliminate them.

Constant draft

Plastic windows are designed to keep heat out of the house and keep out the cold from outside. They must be sealed, strong and durable. If the structure is made of high-quality materials and installed correctly, then it will not allow cold to pass through and does not need additional insulation. Quite often, dishonest companies install windows that will blow through you all winter. If you find yourself in a similar situation, then there is no need to be upset. You can make them warmer yourself without special effort.

main sources

The most common reasons for windows blowing are the incorrect operation of the main mechanisms, the formation of cracks in the structure, and wear of the rubber in the sashes. All this happens either through improper installation of plastic structures or due to a long service life. Over time, the seal in the doors cracks, and constant temperature changes can cause the plastic to bend. The latter most often occurs due to subsidence of walls or window openings.

Installation of slopes

Sometimes the cold begins to penetrate into the room through the cracks that have formed between the slopes and window frame. Most often this is a consequence of poor installation.

If your slopes are sagging because the house has settled a little, then it is best to dismantle the window and install it again. You can also insulate the joints. There are a huge number of different materials for this:

• Drywall;
• Mineral wool;
• Foam rubber and others.

All these construction materials Perfect for solving the problem of uneven slopes.

After you have purchased required material, cut it to the width and height you need. When you install the slope, place insulation under it. But it is best to treat all joints and window frames with silicone (sealant) before doing this. This will allow the plastic structure to be sealed even better.

External slopes can be insulated as shown in the video. But in this case it is better to coat all external seams with silicone. This will prevent moisture from seeping into the room.

Frames and sashes

It is better to insulate the frame of a plastic window using the materials that remain after installing the slopes. This will help you in a situation where the cold passes, even when the doors are closed.

First of all, place the seal and close the window. If the sash closes without much effort and also tightly, then attach the insulation to it using silicone sealant.

Let's sum it up

Plastic windows are great for installation in any type of room. The good thing about them is that you can make them. various designs and forms, depending on individual parameters rooms. Such windows not only provide excellent draft protection, but also have a very long service life.

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