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The market for window constructions for window replaement USA is so big that the consumer is often lost in various materials, profile types, and other features. Therefore, we will try to structure your knowledge to facilitate the search for the right option and choos window companies near me .

The suitable windows we choose in the new house will directly affect the quality of life. They keep warm and can protect against UV rays and ill-wishers' penetration.


how to choose new windows for your home


Types of window profiles

Factors to consider when choosing:

  • the climate in which you live. The prevailing weather is windy or rainy; what is the average temperature and humidity;

  • The side of the house on which the windows face;

  • the presence of a road nearby;

  • the design of the entire structure.


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Even a couple of decades ago, wood was the most popular type of window profile. Even now, it remains pretty popular. However, modern window constructions are very different from the usual wooden frames.

They are made of different species:

  • pine, larch, linden, alder - for simple but reliable models;

  • hardwoods - oak, ash, exotic meranti wood - for more expensive windows.

The manufacturing technology has also changed. Previously, frames were made of solid pieces of wood. Now the technology of glued beam is used - the parts are glued in such a way that the fibers are multidirectional. This structure increases the frame's resistance to temperature changes, snow, and rain.

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Types of wooden frames:

  • Single. The coldest. They are suitable for glazing a summer cottage or a summer kitchen. However, the heat savings will be higher if you install a single-glazed window. On a fabulous autumn day, it will be pretty comfortable indoors.

  • Separate. A familiar design - the sashes open separately. There is a window leaf. Between the internal and external parts, an air layer keeps warmth in winter.

  • Paired. The sashes are fixed with screws and installed in one standard frame. The most challenging thing is to clean it. Dust gets into the cracks. To wipe the inner surface, the window must be disassembled and reassembled.

Although PVC windows are widely available on the market, wooden windows are still a favorite of many. Advantages:

  • Good thermal insulation. This is worth a disclaimer. Yes, wood is a "warm material," but over time, without regular maintenance, the frames will begin to crumble, and there will be cracks and crevices. Therefore, if treated in time, they will keep heat well and absorb noise from the street.

  • Long service life. Yes, it is, but from time to time, it will be necessary to cover the surface of the frames with particular compositions and varnishes to prevent the destruction of the wood.

  • Simple repairs. Replacing the sash or some other element of the construction is simple. Even scratches on the surface can be removed almost without problems.

  • Appearance. The advantage is controversial, but for some people, the structure and natural color of the wood are essential. Frames can be painted or varnished, reducing their "breathing" properties but organically fitting into any house's look.

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  • Regular maintenance - for a wooden window to last a long time, it is necessary to take care of it in time

  • and price. With similar characteristics more expensive than plastic.

In general, if you install a suitable double-glazed window into the laminated timber frame, you get a beautiful eco-friendly construction, which, with careful handling, will last a long time.


These options have recently appeared on our market but immediately gained wide popularity. They are solid and durable. PVC does not absorb water, so it is less exposed to the external environment than wood. Furthermore, it is resistant to temperature changes. If desired, they can be decorated to look like wood or made in colors that are in harmony with the interior. The best option for a private house near a busy road is metal-plastic windows. They reliably protect the owner from street noise. Another undeniable advantage is the affordable price. Therefore, PVC products are a more economical option.

The metal-plastic window consists of:

  • Polyvinyl chloride profile. It is used to make the frame and sashes. Its peculiarity is the reinforcement along the whole contour to give rigidity;

  • Double-glazed window. It is a construction of multiple glass panes separated by chambers. Their number can be from one to three. The coatings are combined to make double-glazed windows with needed characteristics such as protection from noise, sunlight, energy-saving, and multifunctional;

  • Fittings. These are handles, hinges, tilt-and-turn mechanisms, opening locks, etc.

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Design features of the profiles

PVC window profile is a hollow construction, divided into several air chambers. Their number will determine the heat and noise insulation of the product. Several parameters can evaluate the quality of the future window - wall thickness, profile width, and the number of chambers.

  • Class A. External plastic thickness is not less than 2.8 mm, internal partitions - 2.5 mm. They were used in house glazing and durable.

  • Class B. Outer walls - 2.5 mm, inner walls - not less than 2 mm. They are not recommended to install in residential areas. Sound insulation and heat-saving properties are much lower.

  • Class C. The thinnest walls are possible.

Hollow chambers provide thermal insulation properties of the profile.

  • Three-chamber - consists of three different-sized sections. The central one, the largest one, contains reinforcement. Horizontal partitions separate smaller ones on the sides. They give additional rigidity.

Manufacturers recommend installing windows with this profile in areas where people do not live permanently—for example, the workshops of enterprises, summer houses, porches, and barns.

  • Four-five-chamber - has a similar structure, differs in the number of small sections at the walls.

It is suitable for glazing apartments and houses. Well protects the room from noise from the street and keeps a comfortable temperature.

Profile width

Depends on the number of chambers. This parameter affects the noise- and heat-insulating properties of the window construction.

  1. Up to 60 mm. Most often, it is a 3-chamber model with a single-glazed window. Option for gazebo, veranda, balcony, but not residential house.

  2. 70 mm. In combination with a 2-chamber double-glazed window is suitable for glazing an apartment or cottage in an area with a moderate climate.

  3. 86 mm. Durable, with a high level of sound insulation and energy saving. They were installed in areas with harsh winters and in homes near noisy highways or airports.

Fittings and their possibilities

When it comes to fittings, the first thing that comes to mind is handles and hinges. Various opening mechanisms allow you to get hinged, flap, fold, and other designs. A good manufacturer has all the fittings of high quality. Hinges, nodes, and connections should be covered with anti-corrosion compounds, easy to open, and have no backlash. This ensures that there are no problems with maintenance or replacement.

Additional features:

  • The blocker of mistaken opening - the window will not slam in a strong wind.

  • Anti-dropout children - unique mechanisms that are attached to the sash. Will not let the kids themselves open the window.

  • Microlift - a mechanism that reduces the load, preventing sagging.

  • Anti-thrust hardware - will not let an intruder open the window from the outside.

PVC windows are designed so that the sashes close hermetically. In the cold season, condensation may appear on the glass. In winter, it is more difficult to ventilate the room, so it is worth installing special fittings:

  • Ventilation valve - installed on the frame. Due to it, the air from the street freely passes into the room. It has almost no effect on the noise and thermal insulation properties;

  • Comb - stops the sash in the open position. The width can be adjusted;

  • Slit or "micro ventilation" mode. Locking brake - a mechanism inside the handle. When you turn 45˚, the sash does not fit completely, and the air is constantly circulating.

Rating of PVC profiles producers

The Russian consumer prefers German manufacturers. This is because their products are distinguished by quality and durability.

Private house window decoration

When you have understood which profile to put - plastic or wood, it is time to think about the decor.

Natural shades and textures often dominate the country house's interiors. If you prefer PVC windows but want them to look "like wood," a laminated profile will suit you. In its manufacture, a polymer film is used to imitate the color of the wood and its texture. Frames can be with single- and double-sided lamination. So you can choose windows that perfectly harmonize with the house's look and interior. In addition, it is easier to take care of PVC products.

Another exciting design option is stained glass. These are geometric or floral ornaments on the glass. Stained glass elements look good in country cottages and city apartments. Such windows are airtight and resistant to the external environment. But manufacturing and installation will cost more.

Non-standard types of windows: what to look for

Usually, windows in houses are rectangular. But sometimes, the stylistic design of the house involves something different. So let's consider a few unconventional options:

  • Skylights. This is a window installed on a pitched roof to increase natural light in the room. The angle of inclination should be from 20 to 90 degrees. In this case, it is necessary to approach the choice of profile, double-glazed window carefully. It is crucial to exclude heat loss, prevent leaks, and pay attention to noise insulation. Condensation often accumulates on roof windows. To avoid this, it is necessary to choose products with additional ventilation.

  • Arched. The top curved part of the window is made separately from the bottom. This allows the design to be more robust. In addition, it is possible to provide different options for opening sashes: such as windows - an actual room for the imagination. The upper part can be made in almost any shape or decorated with stained glass. An exciting element would be the layouts - additional thin profiles on the glass. The disadvantages are high cost and complicated installation.

  • French. This type of panoramic glazing will visually expand the space and make the room light. If you settled on it, then choose a wide double-glazed window. It is necessary to consider that the profile must withstand its weight. Heating on such a wall is not possible. It will be required to think in advance about an alternative - a warm floor or additional heaters.

  • Bay window. This complex construction of several glass panes extends beyond the building. The windows can be decorated with decorative layouts and stained glass. A particular element for installation is a bay window pipe. With its help, they dock the panels, giving additional strength to the entire structure. As a rule, the glazing area in a bay window is large, so double-glazed windows with increased thermal insulation are installed.

  • Frames. Fanlight is a part of the window located horizontally and is most often used in panoramic glazing. It can be open and closed. Corresponds to the top of the window opening. In houses with high ceilings and large doors, installing a transom window is the safest option. Sashes will not exceed the dimensions; therefore, the hardware will not be loose and will not fail prematurely.

Windows fill the house with light, are responsible for soundproofing, preserve heat, and allow rooms to "breathe ."They are not just the "eyes of the house" but a vital "sensory organ" that determines the interior's interaction with the external environment. We tell you how to choose windows for a country house and do not regret anything.

Material, shape, decor

Wood or plastic? The answer to this question is dictated only by taste and budget. Wooden windows now do not look like the legacy of the Soviet era, which had to be glued for the winter. On the other hand, the thermal properties of modern wooden and plastic windows are almost equal. Therefore, you can choose a variant with a double-glazed window and high-quality fittings in both categories.

What is better for the glazing of the balcony: plastic or aluminum?

A glazed balcony is not a luxury but a common sight in new buildings and secondary housing. Often the "regular" construction is not satisfied with its quality, appearance, or ability to retain heat, so the owners decide to replace them. The most frequent question is what is better for glazing the balcony, plastic or aluminum?

The longest-lived among wooden windows are oak and larch frames.

The difference between plastic windows and wooden windows is the price. Plastic is a more budget-friendly option because it does not possess the noble epithet of "natural" or the aesthetic properties of wood, which are highly valued. To influence the appearance of plastic windows in the interior will help paint or paste particular film.

Another option is aluminum frames. Again, the solution is not budgetary. And it is justified. Aluminum frames are rigid, durable, thin, and visually appealing. The only drawback: they are not too warm, but this problem can be solved with a special insert made of polyamide.

The design of windows in a country house also determines the taste and budget, as well as the architectural style and features of the building. Arched, round, triangular - in terms of the choice of forms, you can give free rein to your imagination.

Playing with historicism can help decorate false windows, also known as "spandrels ."Overlays imitate the glazing on the sections - this is how the windows looked in the houses before the industrial revolution.


Features of national glazing

In urban apartments, the energy efficiency of windows is not as acute as in suburban homes because, in the city, we enjoy one of the best fruits of civilization - central heating.

What windows to choose for a country house to save heat? First, pay attention to the box's width; the larger it is, the better sound and heat insulation. In St. Petersburg's climate, the best solution would be the width of the pack of 70 mm, two-chambered packages with three panes, or three-chambered with four.

A glass package can be filled with an inert gas: argon or krypton. In a gas environment, heat transfer is slowed, and a certain percentage of sound vibrations from the street are delayed, which means that with such windows, it will be warmer and quieter in the house.

Another way to insulate - is energy-efficient i-glass. Due to the metallic coating, such glass reflects thermal energy inside the house and does not allow it to seep into the street. The sputtering is done on the inner panes of glass.

Windows in the country house should also be responsible for safety. The weak point of the entire structure - is the glass; to strengthen it, a unique armor film is used. It will not protect the glass from the impact: it will break, but it will remain in the frame and not break into pieces.

An alternative to the film can be good old metal bars. Don't want the "eyes of the house" staring harshly at the world through the bars while you're inside? Opt for folding structures.

What the "eyes of the house" see

What owner of a country house does not dream of panoramic glazing? Modern architectural styles of the suburban home building also favor floor-to-ceiling windows.

Sunlight is a valuable resource in the interior, especially when we live in a perpetually overcast environment. Large windows or panoramic glazing on the south or southwest side of the house would be a good source of vitamin D.

In sunny weather, such rooms can overheat, so it is worth equipping them with protective means: film, curtains, or blinds.

If the windows in the country house face east, you can enjoy the sun only in the first half of the day, and it is not as hot as on the south side; overheating can not be feared even on clear summer days. These rooms should be allocated for bedrooms - in the morning lit room is easier and more pleasant to wake up.

What kind of double-glazed windows is better to put on the loggia?

The desire to maximize the use of each meter of housing is quite natural, so glazing balconies and loggias now do not seem unusual. For relatively little time and money, you can get another room or a comfortable place to store, protected from rain and dust.

The quality of windows determines the room's comfort, safety and energy efficiency. Therefore, it is necessary to know how to choose plastic windows correctly. To do this, you should study windows classes, design features, functionality, and fittings. It is also essential to pay attention to the manufacturer.

If you do not know how to choose plastic windows, it is better to ask the experts. However, do not prevent yourself from diving into the subject before ordering. Then an unscrupulous seller will not be able to impose products that do not meet your requirements. When choosing, you should equally consider the quality and reliability of all components and select them carefully.

Profile construction and grade

Profile construction consists of metal and plastic. Inside, the division into chambers is made with the help of partitions. Their number depends on their strength and the ability not to let heat out of the room. The profile is made of PVC, which must be:

  • smooth;

  • without streaks;

  • made of a homogeneous material.

There are several classes of profiles:

  1. Class A - for installation in residential buildings. The thickness of internal walls - from 2.5 mm, external - from 2.8 mm.

  2. Class B - for installation both in heated and unheated premises. Often the profile is made without opening sashes. The thickness of internal walls - is from 2 mm, external - from 2,5 mm.

  3. Class C - installed in rooms without heating. Have a smaller wall thickness in comparison with other classes of profiles.

Suppose you are faced with choosing high-quality plastic windows for the apartment, preference class A products. This is because they will provide reliable protection from external factors and, at the same time, help to keep the heat.

Air chambers

The design can consist of a different number of air chambers. The more there are, the better the frame protects from:

  • cold;

  • extraneous sounds.

The higher the number of chambers, the stronger the profile will be, and it will retain heat in the room better. On the other hand, the fewer air chambers in shape, the cheaper they are, but they are not suitable for all rooms.

For example, three-chamber models are in demand due to the optimal price ratio and protection against low temperatures. However, in cold regions, where temperatures fall below -30 degrees, it is advisable to install profiles with four or five air chambers.

Profile reinforcement

Plastic is not very durable, so the PVC profile is reinforced with metal inserts. To this end, galvanized steel is used. The reinforcement's average thickness is 1.5-2 mm; the higher the index, the better. Reinforcing inserts are installed in the largest chamber of the profile. Reinforcement may be U-shaped or square.

High-quality reinforcement of the profile eliminates the risk of deformation of the window construction.

Profile thickness

Profile thickness is between 50-80 mm. It depends on the number of air chambers. Profiles up to 60 mm thick have no more than three chambers, 70 mm - 4 or 5 air chambers. The greater the thickness of the profile, the more possibilities the production technology gives:

  • double-glazed windows with greater depth;

  • additional sealing circuits.

Insulating glass units

A glazing unit is a block of several panes of glass that are hermetically sealed together. The thickness of the insulating glass unit affects its ability to keep out noise and the room warm.

A standard double-glazed window consists of three panes of glass and two air chambers between them. They have a thickness range of 32-53 mm and are suitable for installation in a house or apartment. By increasing the width of each chamber, better insulating properties can be achieved. However, it is advisable to do it to the limit of 24 mm. After that, the favorable properties stop increasing. Two panes of glass are installed on profiles designed to glaze the balconies or loggias. Double-glazed windows with more than three panes are used for rooms in the zone of increased noise.

To increase the energy efficiency of the windows, inert gas is injected into the panes. It additionally creates a noise insulating layer, contributes to improved thermal insulation, and protects against ultraviolet light. In addition, 5-6 mm thick outer glass is used instead of 4 mm to increase soundproofing.

Also, low-emission i-glass or multifunctional glass is installed for better thermal insulation. For light filtration, a tinting film of different transparency is applied to the glass. Finally, triplex or tempered glass is installed to increase the impact resistance.

Spacer frame

Distance frames are made of the following materials:

  • aluminum;

  • steel;

  • plastic.

Frames made of plastic and steel practically do not allow the formation of a cold bridge, so they are considered the best solution. In addition, there is a special absorbent inside the frame that absorbs moisture. This option allows the windows not to fog up in winter.

Sealing rubbers

A sealing gum ensures complete tightness. The windows are fitted with sealing gaskets made of the following materials:

  1. Rubber. Inexpensive option with a low shelf life. Damages from high and low temperatures. Easy to replace with a new seal.

  2. Thermoplastic. Convenient for window production on automatic lines. It costs inexpensive but quickly wears out with frequent window opening. It can be easily replaced if damaged.

  3. Ethylene propylene rubber. A resilient material. It is installed on medium-price windows.

  4. Silicone. The most resistant variant. Has a high degree of durability. Resists temperature fluctuations well. However, it is difficult to find it on sale for replacement.

How do I check the quality of the insulating glass unit?

If it is possible to conduct a visual inspection of a sample of the insulating glass unit, pay attention to such details:

  • the insulating glass unit must have a manufacturer's mark; the mark indicates the date of manufacture, the manufacturer's logo, and information about the components;

  • Check for mechanical defects, and also look that along the distance frame, there are no sealant runs; if there are runs - the insulating glass unit is not of factory production;

  • the outer layer of sealant should be neat and even;

  • The glasses should not be displaced relative to each other.


For opening windows, it is worth choosing proven and reliable fittings. Fittings are one of the most critical components of the window. Although the quality of fittings depends on the functionality of the design and all its characteristics, fittings provide up to 80% of the tightness of the window.

Including how convenient it will be to use the window, the service life depends on the fittings. Therefore, it is essential to choose accessories especially carefully because poor quality fittings will reduce the technical characteristics of the profile and double-glazed window to zero.

Advantages and disadvantages of plastic windows

Pros. One of the main advantages is long service life. In addition, a plastic window without problems endures temperature changes in the street, wind, rain, heat, and cold. Moreover, they do not require painting or any special treatment. By the way, these windows are also fire-resistant.

Also, PVC windows are airtight; that is, they have a high level of thermal insulation. This will help to save on heating in the winter. An additional advantage is a high level of noise insulation.

The cost of a plastic window is less than a reasonable wooden frame. At the same time, you can choose a color for the structure that imitates wood. Or choose any color, although the most common is white.

Another plus is ergonomics. The window is opened by simply turning the handle.

Cons. All the same tightness. Plastic does not breathe, so that the room can create a greenhouse effect. But manufacturers have learned to bypass this drawback with air inlets and split systems. Air circulation is provided, but heat and noise insulation is not reduced.

Plastic windows are practically impossible to repair. Only to replace the entire frame. Fortunately, it is challenging to break a PVC window.

Despite all the disadvantages, the advantages seriously outweigh them. Yes, the price-quality ratio does not leave plastic windows in the apartment competitors.

PVC window design

The structure of the window is relatively standard. But the elements differ in their characteristics. Therefore, for each room, you need to choose your variant.

The main elements:

  • Frame - is installed in the window opening. It has a plastic profile reinforced with steel.

  • Sashes are made of the same material as the frame.

  • A double-glazed window is the basis of the whole construction. Different glasses and air chambers are used.

  • Seals. It is from them that the tightness of the entire structure depends.

  • Fittings. An essential element provides comfort, durability, and reliability.

What to consider when choosing windows for the apartment

Not always the purchase of the most expensive is justified. For example, 3-layer glass is not necessary for warm regions. What do you need to pay attention to when buying?

Air chambers

There are cavities inside the frame, which are called chambers. A double-glazed window also has them, but you should not confuse them. In a profile, it is a cavity that occupies the entire length and is filled with air or metal. There are profiles with cameras from 2 to 5, and even 8. For apartments, three- or five-chamber profiles are used.

The more chambers in the profile, the better heat, and noise insulation. A three-chamber frame is enough for a window that overlooks the courtyard on the south side. And on the north side or on a noisy road, it is better to choose five chambers. The more chambers in the profile, the heavier the whole structure.

Profile width

For the middle belt of Russia, the recommended thickness is not less than 70 mm (minimum 50 mm). This value depends on the noise level, thermal insulation, and resistance to temperature changes. For example, in noisy or icy areas, a width of 130 mm is better.

Also, you can install a thicker glass unit on a broader profile. And increase the width of the steel reinforcement. And this will make the frame more reliable.

How to choose a double-glazed window and its types

The most significant part of the whole window is the insulating glass unit.

By the amount of glass.

There are usually 2 to 4 panes of glass in a double-glazed window. That is, there will be 1, 2, or 3 chambers.

Single-chamber windows are suitable for unheated balconies. Moreover, their price is much lower than that of 2 to 3-chamber double-glazed windows. But the thermal insulation, as well as noise insulation, will not be high.

2-chamber double-glazed windows with three glasses are more often used in apartments.

Three-chamber is the most expensive. And very heavy. But simultaneously, the thermal and noise insulation level is practically the same as with 2-chamber windows.

According to the type of glass

Triplex (safe multi-layered or laminated glass). Suitable for those who live on the first floor will protect against burglary (be sure to use anti-vandal hardware). Or who has small children? Also, the noise insulation level of the triplex is higher than that of conventional glass.

Float glass is transparent over the entire surface and has the same thickness around the perimeter.

Selective (low-emission) glass will help keep heat in the apartment. Due to a special coating, short-wave radiation is delayed, and only long-wave radiation is let in. This allows you to keep warmth in the winter and not let in hot air in the summer. The substance of the sputtering is distinguished from:

I-glasses, which use silver ions. They are not resistant to atmospheric influences, so they are more often used for the inside of the glass. At the same time, they have good transparency and efficiency.

K-glass is float glass with metallic oxides, usually indium and tin. The surface is very dense, but the efficiency is less than I-glass's.

Reinforced glass is fire resistant and the safest due to the reinforced mesh.

Tempered glass has similar properties to triplex. But the main difference is a unique thermal or chemical treatment. If such glass breaks, it produces a lot of small fragments, which are safe.


To understand which variant of glass is in front of you, look at the marking.

Single-glass pane with 20 mm glass thickness is marked 4-12-4, and with 24 mm glass, it is marked 4-16-4. For K-glass, the values used are 4-16-4K, and for I-glass, respectively 4-16-4I.


  • width 28 mm 4-8-4-8-4

  • Width of 30 mm 4-12-4-16-4 and 6-10-4-6-4 (they have different heat transfer resistance and sound insulation coefficient)

  • Width of 32 mm 4-10-4-10-4

  • Width of 36 mm 4-12-4-12-4, with I-glass 6-10-4-6-4I.

The complete deciphering is available on the Internet. There are markings for argon-filled glass. Each type of glass has its characteristics regarding weight, soundproofing, light transmission coefficient, and others. All of these parameters influence the final choice.

How to choose seals

Gaskets are used to obtain the desired level of tightness. They protect against dirt, noise, and cold air entering the apartment from the street. The following materials can be used:

  1. Rubber is a cheap option. And they are often used. The disadvantage is that it hardens at low temperatures. And at high temperatures, it cracks. As with temperature fluctuations. Although rubber seals well, to change such a sealant is quite simple without calling a master.

  2. Silicone has a relatively high cost. But it does not change its properties over time; it withstands temperatures from -40 to +1500 degrees Celsius. Not subject to change its properties when exposed to moisture or sunlight. At the same time easily breaks if there is even a slight tension.

  3. Ethylene propylene rubber (EPDM) is not afraid of temperature changes, rainfall, sunlight, or mechanical damage. And the cost is reasonable. It was installed without welding on the entire perimeter of the profile.

  4. Thermoplastic elastoplastic (TPE or TEP). Combines the properties of rubber at an average temperature. But at heating, it has thermoplastic properties. At the same time, over time, it deforms if it is pressed hard enough. Cheap and easy to install. That's why manufacturers often use it in double-glazed windows.

What fittings to choose

Fittings directly affect durability, functionality, and convenience. This point should not be ignored.


Must be able to withstand the weight of the glazing unit. It is better to choose a strong material.

They differ in the way of installation:

  • Standard overhead can be tilt-and-turn or simply rotary. It consists of 2 metal cards. To give an aesthetic appearance, decorative plates are used.

  • Swivel hinges used to be used on wooden frames. The pins are attached to the sash and frame; the more hooks (usually 2 to 6), the more reliable the entire structure.

  • Insertion hinges are the most common. Provide a wide opening angle of the window.

The anti-burglary ones will provide maximum security. They cannot be disassembled if the window is closed.

Concealed hinges make the opening angle limited. In this case, the sash will not knock against the slope. And the hinges will not be damaged during the repair.


They are used repeatedly every day. Handles differ in material (metal, plastic), color and function:

  • The standard ones are the most common. Allow you to open, close the sash, and leave a half-open position for ventilation.

  • Counter-breaking is similar to the standard properties. But the mechanism does not allow you to open the window from the outside.

  • Removable handles and handles with a lock are helpful for families with small children. So you can be sure that the child will not inadvertently open the window.

In addition to the standard location of the handle in the middle of the sash, you can install it on the bottom part. Suitable for tall windows. Or in rooms where the free passage to the window is limited.

Locks and locks

It is an optional element, but it will come in handy for those who live on the first and last floor and have small children. You can install a lock on the plastic window in the apartment with locks, child lock, and bolt.

Sashes at the plastic window can open in different ways.

Swivel opening is the easiest and most common. It is suitable for washing windows. But it is not very convenient to ventilate since the sash is opened completely. However, it is possible to use a limiter.

Tilt-and-turn. The Sash window opens in 2 planes: on itself (it turns into a window leaf, it is convenient for air) and rotates to open the sash completely.

Folding is suitable for ventilation; to wash needs to detach the mechanism.

Sliding (sliding) is suitable where there is no space for tilting the sash. Or the entire construction of the double-glazed window is heavy.

The Deaf do not open, and you can not wash them. Most often installed on the first floor or in combination with opening sashes on the sides.

Frame ones have two sashes; one of them is opened at the top or the bottom. More often used in office buildings than in apartments.

Ventilation in PVC windows

The main advantage of plastic windows is their airtightness. This is why they are loved to be put indoors. But what about ventilation?

Modern technology has made plastic windows breathe through special ventilation valves. With their help, the microclimate will be maintained, but there will be no heat loss.

You can use micro ventilation (micro-ventilation) when a small gap is formed between the frame and sash. It is so tiny that it provides fresh air inflow but does not reduce heat and noise insulation.

Also, in the design, make a window sash. Then the cold air goes to the ceiling, does not fall on the person, and brings fresh air into the room.

The combs allow you to open the sashes only to a specific width. And 4-5 positions optimally regulate the incoming air flow from the street.

To avoid "weeping" and fogging of the windows, it is necessary to maintain humidity not more than 60% and a temperature of 20-25 degrees in the apartment.

Design and color

Standard plastic windows in the apartment have a white color. But in fact, there are many more options.

You can glue a film of any color and texture on the frame, for example, under the tree.

The frame can be divided into zones of different shapes. Make it triangular or rounded. This will add zest and make the construction more reliable. The windows themselves can be arched or oval.

Tinting for the glass will give a hue inside the room. At the same time, the intensity of ultraviolet light will be reduced. So, yes, and from the outside will not be visible to the room.

As a decorative element, you can make a stained glass drawing.

Mirrored glass, as well as tinting, will protect from solar exposure and prying eyes.

Used not so often, but has already proven itself smart glass. The degree of transparency depends on the intensity of light—a convenient alternative to curtains and blinds.

Features of windows for individual rooms

The choice depends on the room where the window is installed. So, installing 1-2 chamber double-glazed windows in a warm climate is possible. However, on the north/cold side, it is better to use a 3-chamber variant. In this case, a single-chamber double-glazed window is enough on a balcony or a loggia if they are not used in winter.

It is worth paying attention to the level of noise insulation. It is different for each insulating glass unit. The glass and profiles may be extra for rooms overlooking a noisy street or courtyard.

Tips from the experts when choosing windows in the apartment

Mosquito netting will prevent insects, poplar down, and leaves from entering the room. It does not interfere with air circulation but reliably protects. Installed and removed quite simply; if necessary, it can be replaced and washed off the dirt.

The window sill is not only a beautiful frame. But a critical functional detail. Choosing models resistant to mechanical damage is better, not yellowing in the sun.

Sills are installed between the wall and the window profile. They should be of high quality so that mold does not form. It is better to make insulation inside; otherwise, it is possible to freeze.

Sills are made on the outer side to drain the precipitation quickly. It can be made of polyester, aluminum, or galvanized. There must be a gasket that dampens the sound. Otherwise, it is unlikely to fall asleep in the rain. Also, the tides retain waterproofing.

Professionals should carry out the installation. The most reliable construction will not last long if installed incorrectly. Everything must be quality foamed and protected. So that precipitation from the outside and moisture inside do not spoil the window.

Plastic windows in the apartment are not chosen for one or two years but for decades. Therefore, before deciding, you need to analyze all parameters carefully. Then no draft, rain, or street noise will not disturb the peace at home.

How to choose windows for the apartment?

Choosing plastic windows for different rooms of a city apartment or country house, you should consider the following parameters:

- The number of window sashes.

- Type of their opening.

- Window profile thickness.

- Number of glasses in a double-glazed unit.

If you want to make the room warm and protected from street noise, choose the maximum possible thickness of the window profile. Climatic conditions of our region require that the window pane be double, so you keep warmth and comfort on the premises and prevent the formation of condensation and frost on the windows. In addition, modern hardware on the window sashes allows you to fully and without risk of drafts to ventilate the apartment space and safely care for the windows.

For glazing balconies, loggias, winter gardens, or terraces, it is advisable to choose a more affordable window profile with fewer panes and use a single-chamber double-glazed unit. This way, you can maintain a comfortable temperature in these rooms and save money on glazing.

Window operation

Unlike traditional wood windows, PVC windows do not require constant attention: paint updates, insulation, or painful removal of dirt from cracks. However, for the windows to serve longer, care and compliance with the rules of operation are necessary. It is imperative to remember that the plastic and insulating glass should not be exposed to mechanical deformation and high temperatures. You should not leave them turned on or cool iron, boiling pot, and other objects next to them. You should not use aggressive abrasives that can leave scratches and streaks when cleaning.

 How to avoid condensation on windows

Modern plastic windows have a lot of advantages, one of which is airtightness. It protects the apartment from unnecessary noise and dust from the streets. The room should be ventilated from time to time; because of the airtightness, condensation occurs at the temperature difference between the street and home. Without proper ventilation, humidity in the apartment will increase, which may lead to mold and mildew. Drainage holes in the window frame play a unique role in caring for windows made of plastic in winter. They drain water that has leaked through the gasket. If dirt is trapped in them, the windows can fog up, ice is formed, and the room's humidity increases.

Care for Plastic Windows

To avoid future costs to repair or replace windows, you should know how to care for plastic windows in winter and summer. It is better to use nonaggressive means with a degreasing effect or solution of usual soap for washing.

It is inadmissible to use products containing:

- Abrasives;

- Alcohol;

- Chlorine;

- Acetone;

- Gasoline;

- Acids and alkalis.

Mechanical and chemical impact deforms the surface of the windows, forming microcracks in which dirt likes to accumulate. Also, the protective layer of the plastic profile is damaged, due to which the sun will begin to destroy the material. At first, it may seem that nothing has happened to the window, but then the color of the plastic will change, and the appearance, in general, will be spoiled.

For stains that are hard to remove and not removed by common remedies, you can use specialized products to care for plastic windows. They perfectly cope with difficult dirt and return the surface of the window's original shine and beauty, removing microcracks.

Tip: To quickly clean windows without streaks and scratches, it is better to use microfiber cloths. After the soapy solution, its residue is removed with a dry clean cloth or rag.


The seals are located around the perimeter of the frame and also need care and cleaning. They should be cleaned gently with a cloth and soap solution. And after drying, lubricate with glycerin. The condition of the window seals determines the heat-retaining properties of the window, its airtightness, and protection against noise. A couple of times a year, preferably in the off-season, they should be cleaned and lubricated with glycerin or silicone oil. This will prolong their service life and prevent the loss of their original properties. Fittings

 One of the most critical components of a window is hardware. They are subjected to a lot of stress, so you need to follow the recommendations for use, so they do not break. From time to time, the hardware can be lubricated with specialized lubricants for plastic windows. And the most important thing is to avoid damaging the hardware.

Insulating Glass

The glazing unit can repel dirt but still needs periodic cleaning. You can wash insulating glass units with dishwashing detergent solutions. Under no circumstances should sharp piercing objects or cleaning products with abrasives in the form of powders. All products for the care and cleaning of plastic windows are sold in supermarkets and are readily available.

According to the rules of operation, plastic windows should not be used:

- Putting everyday objects between the sash and the frame.

- Apply too much force to handles and other elements.

- Leave windows or balconies open in strong winds.

- Hang clothes, bags, and other objects on the sash.

With proper care and use, windows will last a long time, performing their functions properly.

When deciding which window profile to choose for your home, keep in mind that glazing is a long-term purchase, and if you want it to last you several decades, it must be of high quality, and quality is never cheap. Therefore, to save money, it's essential to understand precisely what design features will change because of the lower price. This will help you avoid disappointment and understand what you will get more realistically.

A key aspect when choosing windows for a private house is the material of their profiles. It is the one that determines the essential technical characteristics of the entire construction. Windows can be plastic, aluminum, steel, or stainless steel. The properties of all these materials are quite different from each other.


From PVC profiles can be made classic in shape and size designs and panoramic opening windows in the floor size of 2-4 sash.

  • Quality plastic windows can last from 10 to 20 years.

  • Even considering the metal elements in their composition, PVC profiles weigh less than steel and aluminum.

  • Plastic profiles with special coatings and films can be decorated as wood, or metal painted a color, or left the classic white.

  • Polyvinyl chloride - non-combustible material in contact with fire; it only melts.

High-quality plastic windows do not create a greenhouse effect in the room and do not emit any odors when heated in the sun.


Aluminum structures are becoming increasingly popular in modern residential construction due to the characteristics of this metal and the opportunities it opens up for glazing.

  • Windows made of aluminum profiles can have non-standard geometry and much larger dimensions than structures made of plastic.

  • Aluminum is suitable for creating sliding window portals of 2-6 and sometimes even more sashes.

  • Aluminum profiles do not rust.

  • The aluminum profile surface can be anodized in classic or bright colors, painted in the desired color, or painted over.

High-quality aluminum structures can last up to 30 years or more. As a result, the care they require is minimal. In addition, a wide range of possible characteristics of aluminum windows allows the creation of designs ideally suited for any climatic conditions, including contrasting changes of seasons and significant temperature changes during the year.


Steel and stainless steel windows are most commonly used in brick or loft-style projects with an objective need for such materials.

  • High-quality steel windows can last up to 50 years, retaining their original properties.

  • Based on steel profiles, it is possible to create large-sized structures of non-standard shapes.

  • Steel and stainless steel are best suited to manufacture fire-resistant windows with a high fire resistance rating.

  • The surface of steel profiles can be painted and decorated with brass, bronze, or copper, the feeling of stainless steel can be polished to a high gloss or polished to a matte finish.

Steel structures have a lot of weight and may not be suitable for every project, so their selection should be approached only by a specialist who will make all the necessary calculations.

To simplify the process of choosing the profile material, you can make a free-form list of your wishes for ready-made window constructions and apply it to the company's consultant, where you will order the glazing. The manager will choose several variants of profile systems based on your preferences.

What kind of windows should be in a private house?

When choosing windows to argue on the principle of "what is better - plastic or aluminum?" it makes no sense, as a universal window that would suit all projects without exception does not exist; each object must be considered separately. If you do not know what windows to choose for the house, consult on this issue with experts - the project's architect if you have one or a company specialist where you will order the windows. With the help of information given in this article, you can understand what should be the windows in your private home in general. Still, the actual selection of structures for the object should do for you only professionals.

Second after the material of the profiles, and quite an extensive aspect essential to consider when choosing windows for your home, are their technical specifications. The following specifications vary in levels and classes and can be combined in the necessary combinations.


What size to make a window is determined by the project and your wishes, a universal recipe here, again, no. More reasonable to start from what requirements you have for designs and look for window models that can meet these requirements.

The unique design to create windows can be used jumbo glass up to 6 meters high, facade glazing technology, large sliding sashes up to 3.5 meters in height and 3.2 meters in width each. Our custom-made solutions can be tailored to any design requirements, from the classic to the most unusual.


Windows can have a standard rectangular or square shape or more complex geometry, such as

  • Arched

  • Round

  • Triangular

  • Arched

  • Arbitrary shape

The design can have as many corners and edges as necessary for a particular opening.

How the sashes open

The purpose of the window largely depends on how it opens. A window can be:

  • Deaf

  • Swivel

  • Sliding

  • Folding

  • Suspended

In constructions, it is possible to combine sashes with different types of openings. They can perform a purely decorative function and be used for ventilation. Floor-to-ceiling windows can also be used as doors.

Level of thermal insulation

The thermal insulation of windows can be divided into three levels.

  • Without thermal insulation - these windows are mainly suitable for regions with a mild climate and non-residential spaces in the house.

  • Insulated - the level of thermal insulation in this category can range from minimal to high; the best option can be chosen for any living space and climate.

  • With thermal insulation according to the eco-standard "passive house" - the highest possible level of thermal insulation and energy saving.

The optimal thermal insulation of the window should be calculated, considering the peculiarities of the house construction and the surrounding climate. For example, in regions with cold winters, it is better to choose systems with higher and maximum levels of thermal insulation.

Protective properties of structures

Each structure has its class or level:

  • Soundproofing

  • Air permeability

  • Waterproofing

  • Resistance to wind loads

The higher the value, the greater the protection in the specified parameter. This can be especially important if the house has specific conditions; for example, a site near an airport or a busy highway may be essential for increased soundproofing in an area where it rains often and there are hurricanes - waterproofing.

Burglary resistance

Each country has its system of classification of burglary resistance glazing. The protection class's name depends on the profile system's supplier. When designing custom windows, you can choose a suitable level of security from several options. During the selection, the window company consultant will explain what this or that marking on the product means.

Properties and appearance of the glass

The glass in the windows can be:

  • Completely transparent or frosted

  • Smooth or textured

  • Tinted or colored

  • Reflective

  • Supplemented with a decorative segmentation profile

You can use glass with different properties:

  • Tempered

  • Shockproof

  • Energy Saving

  • Sunscreen

  • Fireproof

  • Bulletproof

Different types of glass can be combined, placing them in the same pane and giving them the desired appearance.


Window automation can include:

  • Various sash control systems.

  • Security and access control systems.

  • Sensors collect and transmit data about the state of the structures and the space around them.

Modern plastic, aluminum, and metal windows can be connected to innovative home systems based on existing platforms, including proprietary software from glazing manufacturers.

Additional options

The use of additional hardware allows you to expand the functionality of windows significantly. So, for all sizes of windows, from classic to panoramic, mosquito nets and nets can be installed for the safety of children and animals, limiters opening sash, and built-in and hinged sun protection systems, which can be managed manually or automatically.

The range of possible values of these or those features and options to choose from will depend on the model of the profile system. You can select the optimum combination of parts for your project in consultation with a specialist of the window company.

Functional peculiarities of the metal-plastic window

Usually, people are cautious when choosing every element of their home, but the windows traditionally rank first in this list of priorities.

The overall impression of the house, as well as the quality of life in it, depends on the appearance and parameters of the windows. Therefore, planning, designing, and repairing the apartment or house does not accidentally begin with the choice of window designs.

When choosing a window, the buyer often looks at the design and assesses the manner of opening, cost, and care rules for the construction. Important technical parameters are pushed into the background or are not considered at all.

This approach is incorrect since the choice of high-quality windows from metal-base laminate requires knowledge of basic technical requirements for the product and attention to each detail of the design - especially the insulating glass, profile, seals, and fittings.

When deciding which windows to choose for your home, you need to consider their purpose. A modern window should perform many functions:

  • Provide sufficient lighting;

  • protect the room from external factors - wind, dust, precipitation;

  • reduce heat loss as much as possible;

  • reduce noise level;

  • provide effective ventilation;

  • prevent the entry of unauthorized persons.

The abundance of models puts the uninformed buyer at a loss. In this case, it is necessary to have a detailed guide that contains everything you need to know about plastic windows. Furthermore, a detailed guide to choosing will help to understand window designs, the purpose of the main elements, advantages, and disadvantages, taking into account accurate technical information and opinions.

What you need to know about the typical design of the PVC window

Modern plastic windows - an inexpensive and high-quality high-tech product, durable, easy to use, and repairable at any time of year.

The main elements of the standard window construction are:

  • frame - PVC frame, reinforced with metal plates;

  • sash - movable opening part of the frame;

  • double-glazed window - an airtight construction of two or more panes of glass;

  • glazing bead - plastic profile fixing the glazing unit;

  • mullion - support for fixation of the sash;

  • fittings - details for setting and functioning of the window;

  • reinforcing bars - inner metal elements of the profiles;

  • jambs - a decorative piece that closes the adjoining end part of the wall.

Choosing the right profile

PVC profile is used for the load-bearing elements of frames and sashes - a complex structure made of polyvinyl chloride and metal inserts with sealed segmented cavities. Figuratively speaking, the profile performs the function of the window skeleton.

The manufacturer determines the configuration of the cross-section with chambers. Theoretically, the more interior rooms, the better the strength and heat preservation product characteristics.

Polyvinyl chloride was chosen as the primary material for the production of modern windows for a reason. High-tech plastic has many advantages:

  • low thermal conductivity coefficient;

  • resistance to atmospheric and thermal effects;

  • environmental friendliness;

  • reliable noise isolation;

  • high adhesion to the coatings;

  • durability;

  • affordable price.

Why is profile thickness critical?

Standard window profiles from different manufacturers are almost identical in the leading technological indicators. Advice on the window what is better to choose the characteristics of the profile relates primarily to its thickness. Thin walls weakly protect against the cold, limiting the design's overall size and the choice of fittings. In addition, the plastic's thickness determines the structure's mechanical stability, form stability, the corners' geometry, and the frame's overall strength.

Depending on the thickness of the outer contour and partitions, the profile is classified into three classes.

  1. Class A. The best option for apartments residential buildings. Minimum thickness of the outer walls of 2.8 mm, inner from 2.5 mm.

  2. Class B. Profile is designed for non-residential premises, holds heat worse, and is less stable to loads. The thickness of the walls is over 2,5 mm and 2 mm.

  3. Class C. Object profile with non-standardized wall thickness is designed for unheated buildings. As a rule, it has a monolithic construction with blank sashes.

Meaning and characteristics of air chambers

The inner cavities of the profile or chambers should not be confused with the sections of insulating glass units. They occupy the entire shape length and are filled with air or reinforcing material.

In window frames, airtight chambers have a dual function - strengthening the structure and effective thermal insulation. In addition, exterior compartments drain condensation resulting from the temperature difference between outside and inside the room.

Technological holes are invisible and closed from the outside with decorative plugs. If the front of the window has no such openings, you face a low-quality construction, which is unlikely to last for a specified period.

The number of chambers affects the insulating properties of the window; the standard requirement - is at least three for the cold type of glazing and five - for heated rooms. In addition, with a more significant number of chambers, the increase in weight causes an increase in thermal conductivity - at the forefront are the thermal properties of the partitions, but not the volume of the air layer.

This is interesting! The thermal conductivity of window profiles with seven or more chambers is lower than that of similar products with half their number - the abundance of partitions minimizes the insulating properties of the air layer. Thus, a comprehensive profile with a limited number of chambers retains heat better than its narrow multi-chamber counterpart.

Filling the cavities with expanded insulating materials - polystyrene or glass fiber increases the insulating properties of structures, while the price also increases.

Profile width - what it affects

Another critical parameter is the thickness or mounting depth of the profile, which begins with 50 mm. For regular operation with the observance of norms of heat and sound insulation of the premises, this parameter is set in the range of 58-70 mm. In problems, cold regions, and noisy locations, the thickness can reach 130 mm. There is a correlation between the profile width and the number of chambers and, as a consequence, the thermal insulation properties of the frame.

Sound insulation is not essential to the number of chambers but their size and inner air volume. Wide frames allow you to install thick double-glazed windows, massive fittings, strong fittings, and additional sound insulation circuits.

Frost resistance PVC profile

In the domestic climate, an essential property of plastic windows is their frost resistance, which characterizes the ability to preserve the integrity of the structure and heat preservation properties at negative temperatures.

Profile parameters are specified in the product passport. For the Russian climate, it is necessary to choose frostproof constructions, designated by an index "M."

Profile Reinforcement - Why It Is Necessary

Polyvinylchloride itself is not durable material; over time yields to mechanical and thermal deformations. However, its durability and resistance to external influences by order of magnitude increase with metal inserts or reinforcement.

A reinforcing element is a U-shaped or square metal profile inserted into the central chamber. It is made of galvanized sheet steel with a thickness of 1.4 to 2 mm and is characterized by its strength and resistance to corrosion.

The thicker the metal fittings, the heavier the glazing can be installed in the frame. It is more reliable to attach fittings to metal, of which there are many in modern window construction.

Pro tip! When buying a window, you need to make sure there is a reinforcer. In its absence, the frame will deform at contrasting temperatures, fraught with sealing violations and problems with closing. In addition, laminated structure reacts more robust to changes in external temperatures, so reinforcing the profile is mandatory, regardless of the configuration and size of construction.

All you need to know about insulating glass units

The insulating glass unit is one of the most responsible parts of the window unit - along with the frame, it is accountable for the quality of thermal insulation and noise reduction. At the same time, it provides the primary function of the window - light, and the quality of the glass in the package determines the level of light permeability of the whole construction.

Compared to traditional window glass, the double-glazed window has a complex construction and a long list of functions. However, the characteristics are secondary and essential to consider first in the search for an answer to the question "how to choose high-quality plastic windows."

For each climatic zone, type of building, and spatial orientation of the window opening, there is a "correct" insulating glass unit. The main characteristics - heat conductivity, strength, and noise insulation, affect the choice of design, construction, and other features of the window, depending on the ease of use.

Thermal conductivity

The glazing area is much larger than the total area of the frame, so the energy efficiency of the insulating glass unit must be greater than that of the profile. Considering standard size sizes of glazing, it is not easy to achieve. Manufacturers use modern methods to increase thermal efficiency:

  • increasing the number of cameras and the size of the distance frames;

  • energy-saving spraying;

  • filling the chambers with inert gases.

The possibility of increasing the chambers is limited by weight. Two-chamber construction reduces the thermal conductivity of the glazing unit by 35%, increasing its importance to the same extent. Further increase of chambers and weight will require more powerful fittings and reinforcement of fittings.

As a result, the window will become too heavy and expensive, compared to a slight increase in energy savings. In addition, increasing the size of the chamber itself has a physical limit - the maximum thickness of the double-glazed window varies in the range of 14-18 mm and cannot increase indefinitely.

Spraying the finest metalized film with reflective properties on the glass gives more impressive results. For example, using K-spraying based on tin helps reduce heat loss in a single-chamber package by 25%, and in a two-chamber box filled with inert gas, by 30%.

If K-deposition is not afraid of external influences, the low-energy i-deposition is quite sensitive, so it is applied on the side of the chamber. Furthermore, the use of innovative technologies - rare-earth metal coating along with the injection of inert gases into the room - guarantees 40% energy savings without increasing the weight of the sash.


The soundproofing properties of the glass unit are directly related to soundproofing. In both cases, these properties improve with the increase in chambers. For example, an additional 3 mm of distance frame improves sound insulation by 10%, with a double-glazed window in the room quieter by as much as 45% compared to its single-chamber counterpart.

Replacement of the chamber air with inert argon provides a good effect - insulating properties improve by 10%. In addition, notable acoustic films, glued structures of glass, and polymer like triplex give an even more pronounced effect.

Sun protection

Glass panes with spraying and tinting save from the sun's rays and prying eyes. Although tinted glass with metal oxides has long been used, they cast different shades of color and absorb up to 50% of sunlight, while their transparency is also reduced.

Modern i-coated glasses are transparent, pass the visible part of the spectrum, give an accurate picture of the world, and delay dangerous radiation - ultraviolet and infrared. Moreover, it is not hot in rooms with such glass in summer; in winter, they reflect heat rays from inside, thus significantly reducing heating costs.

Safety and extra features

A larger glazing area means a higher risk of glass breakage. To increase safety, tempered glass is present in the glazing, with higher tensile, bending, and impact resistance. The hardening only affects the mechanical properties, sound, and heat insulation characteristics, and light transmission remains at the same level.

Laminating is another way to strengthen the glass. Combinations of different types of glass and films based on triplex technology are used to produce anti-burglary packages. Sturdy reinforced glasses use particular metal or transparent polymer mesh instead of film.

Stelkopackets are decorated inside with various decorative elements - strokes installed directly in the chambers. Built-in roller blinds and shutters allow any time to shade the room; they are fully sealed at the production stage and do not reduce the basic properties of double-glazed windows.

Tips for choosing a gasket

The seal is an inconspicuous, important detail that ensures the glazing units' airtightness and tight closing of the sashes. As a seal, materials are used, each of which has its advantages and disadvantages.

Rubber is the cheapest and most common option of all possible seals. The material reliably seals the construction but has a severe disadvantage - at low temperatures, it blows and cracks due to constant temperature fluctuations.

TPE or thermoplastic elastomer is a technologically advanced material for automatic assembly lines. Although under normal conditions, the seal shows the properties of rubber, with increasing temperature, it acquires the properties of thermoplastic: softness and elasticity. Disadvantages - it wears quickly and becomes brittle due to temperature changes. But, on the other hand, it is easy to change and costs cheap.

Silicone is a safe and durable material. During the long period of exploitation (with the proper care till 20 years), it preserves original properties irrespective of atmospheric influences, is not deformed, withstands the maximum range of temperatures from -40 C up to + 100 C and more, the action of cleaning agents. However, the broad application is limited by the high cost of silicone.

EPDM - ethylene propylene rubber or synthetic origin. The popularity of the material is due to its good performance characteristics at an affordable price. In addition, the sealant serves up to 10 years and endures mechanical and external atmospheric effects.

An essential disadvantage of EPDM technology is the impossibility of welding, and the seal must be placed without tearing on the perimeter of the sash, which complicates installation significantly. In addition, it is applied to moderately expensive windows and products with large linear dimensions.

So, knowing exactly what to pay attention to when ordering plastic windows, you can choose a good option for seals - TPE, even better, but more expensive - silicone and rubber, rubber is better not to take.

Window hardware

Window hardware is responsible for the overall functionality of the construction - it determines how long the window will last and how convenient it will be. The presence in the design of a heavy glazing unit and the need for frequent opening of sashes for ventilation defines the basic requirements for the fittings of the window unit.

All elements must be wear-resistant, robust, reliable, and durable, resistant to corrosion and mechanical stress. In addition, external parts must have a neat and attractive appearance.

Steel with corrosion-resistant coating or stainless-steel alloys are used for the fittings.

Decorative elements and plugs are made of polymer compounds of basic profile. The type of closing sashes determines the composition of a set of fittings, bought together with the window unit.

As a rule, the standard set of window hardware includes:

  • steel locking mechanism with handle;

  • top and bottom hinge groups;

  • corner switch module;

  • bands and combs for transferring forces between modules;

  • studs and screws.

Quality factory hardware for a plastic window is a technically complex system of sealing, air exchange, opening, pressing, and protection against intrusion and unauthorized opening.

It encircles the sash around the perimeter and is securely attached to it, providing at least three points of support in any position of the strap. In this case, the sash can turn one handle to micro ventilation mode and open at different angles.

The most common types of fittings providing movement in different planes:

  • Pivoting

  • The traditional system of turning the sash around a fixed vertical axis.

  • Hinged

  • Enables rotation along the horizontal axis, upward or downward opening, depending on where the mechanism is mounted, used with a swing angle limiter.

  • Tilt&Turn

  • A universal system allows movement of the sashes in the planes, with the lower fixing and tilting of the strap from the upper frame horizontally. Activity is regulated by turning the handle at different angles.

  • Sliding

  • Ensures the frame moves along the plane of the window opening and is used for panoramic windows, balconies, and terraces.

  • Tilt-slide

  • Allows sliding aside, tilting sashes, ajar windows, and doors at the top.

Fittings of metal-plastic windows are initially designed for heavy loads, especially when using double-glazed windows.

Standard high-quality fittings withstand weight in the range of 50-130 kg, depending on the size and structure of the window; reinforced fittings are used for massive windows of complex configuration, large sizes weighing up to 200 kg.

Premium class products are designed for 50 thousand cycles and more, with a guarantee of flawless operation for ten years. Standard high-quality fittings of medium price segment provide 10,000 cycles, which means the standard sequence of operations - alternate opening, closing in two positions.

Window blocks made of PVC are not installed for a day, so it makes sense to study the design features and individual elements to evaluate their benefits and make the best decision.

In practice, the question of how to choose plastic windows is a difficult task, the solution of which depends on many factors. However, knowing the range, nuances, and design features of the window products guarantees a perfect result - beautiful sealed windows and a

complete absence of problems for many years.

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