The worst profile for pvc windows. Which profile for plastic windows is better - an overview of parameters and manufacturers. Which manufacturer of plastic windows is better to choose

From this review you will learn:

• Popularity rating of plastic windows on the Internet
• Which profile for windows is better according to GOST and Eurostandard
• How to determine a quality profile in appearance
• Window Profile Tips

The rating is based on Yandex search engine statistics. Analysis of user requests allows you to find out the popularity of plastic window profile brands among the population of Russia. After analyzing the most popular user requests, we managed to identify the TOP-3 most popular profile systems.

Rating of the TOP-3 most popular profile systems in Russia according to Yandex statistics: REHAU, VEKA, KBE .

The graph shows the dynamics of requests for queries:

• — "plastic windows rehau"
• — "plastic windows of the century"
• — "plastic windows kbe"

According to statistics for 2017-2018-2019 in Russia, the Internet users are the leader in demand for:

1. The greatest demand for plastic windows made of PVC profile Rehau (Rehau). Averaged 5,627 hits per month in 2019.
2. The second most popular are plastic windows of the Century (VEKA). An average of 2510 hits per month for 2019.
3. In third place are KBE windows. Averaged 755 hits per month in 2019.

Which profile for windows is better according to GOST

GOST is an interstate standard, the requirements of which must be observed in the following countries: Russian Federation, Armenia, Kazakhstan, Kyrgyz Republic, Moldova, Tajikistan, Uzbekistan.

The quality criterion for plastic profiles for windows in Russia is GOST 30673-99 “Polyvinyl chloride profiles for window and door blocks. Specifications".

Criteria and profile class according to GOST 30673:

Thus, the best profiles, according to GOST 30673, are:

PVC window profiles of any brand with a thickness of the outer front wall from 2.7 mm with a heat transfer resistance of more than 0.8 m 2 ° C / W

They are required to meet other quality criteria in accordance with GOST.

The quality of the PVC window profile according to the European standard

To determine the best profiles in Europe, the European standard EN 12608:2003 is applied.

The European standard EN 12608:2003 "Profiles made of polyvinyl chloride (PVC-U) without plasticizer, intended for the manufacture of window frames and doors. Classification, technical requirements and test methods" also has the status of the German DIN standard. The requirements of the standard are applicable to the countries: Belgium, Denmark, Germany, Finland, France, Greece, Ireland, Iceland, Italy, Luxembourg, Malta, the Netherlands, Norway, Austria, Portugal, Sweden, Switzerland, Slovakia, Spain, the Czech Republic, Hungary and the United Kingdoms of Great Britain.

The European standard EN 12608:2003 has much in common with the Russian GOST 30673, since the domestic standard is an edited version of the European one.

A distinctive feature of the European standard is the division of the profile class into two different climatic zones "M" (temperate climate zone) and "S" (hot climate zone).

Profiles designed for operation in the hot climate zone (S) can also be used in the temperate zone (M). In countries where both climate zones exist, profiles intended for operation in the temperate climate zone (M) should not be operated in the hot climate zone (S).

The classification of the main profiles according to their impact resistance, determined using a falling impactor at a temperature of -10 ° C, is also associated with a significant difference in climate. Allocate profiles 1 and 2 classes.

EN 12608: PVC window profile class according to external face wall thickness

• Class A - greater than or equal to 2.8 mm
• Class B - greater than or equal to 2.5 mm
• Class C - not standardized

It can be assumed that the thickness of the outer wall of the PVC profile is 3 mm, perhaps the most important characteristic of a PVC window, although the European standard says that this should not be understood as such.

How to identify a quality PVC profile in appearance

In the finished window, only the appearance of the profile remains the only method for determining its quality. It is a rare necessity to carry out an examination, disassemble and cut a PVC window frame to check its class. Much easier to know the quality of the inspection.

So how do you determine the quality "by eye".

Manufacturer's mark

The PVC profile brand is applied on the film by the manufacturer. The protective film covers the main surface of the PVC profile at the stages: from manufacturing to installation in the opening. To avoid damage, the film must be removed immediately after installation. Under the action of sunlight, the adhesive layer of the protective film will be absorbed into the deep layers of the profile and spoil it. The brand is also indicated on the profile itself in the form of laser-etched numbers and letters.

Uniformity and smoothness of the PVC profile under the film

Homogeneous, even, uniform and smooth surface - a criterion for the quality of the window and profile. The presence of inhomogeneities, deformations or other flaws visible to the eye on straight and even sections of the profile may indicate poor quality.

Window frame seal - shape, type, color

The seal is one of the most important profile elements. Poor-quality sealant will not protect against moisture and drafts. Pay attention to its elasticity and lack of damage. The presence of a third sealing circuit does not significantly affect the frost protection, but protects the fittings from an aggressive external environment. Color - does not affect the quality. White, black, gray and caramel sealant will protect the window equally well. Seals made of EPDM rubber are more elastic to the touch, inserted with separate cords (unlike co-extruded TEP seals).

Frame box width
The thicker the window frame, the higher the thermal insulation properties it will have. The number of cavities in the PVC profile - chambers - also affects the performance. More chambers - warmer profile. However, you will not see the profile camera externally. A 70 mm profile can have 3, 4 or 5 chambers.

Chambers in the profile are considered not by the total number of cavities separated by partitions, but by the number of chambers on the way from the outer wall (street) to the inner (room).

Sales volume of plastic windows by PVC profile brand

Among the plastic profiles for windows, there are their Mercedes and their Ladas. There are budget options for profiles and exclusive, luxury PVC profile lines. At the same time, most often expensive and cheap profiles are sold under the same brand.

Profiles of German brands REHAU, VEKA, KBE, Deceuninck are in the greatest demand. However, this does not mean the poor quality of domestic profile systems or other PVC profiles that are present on the market in great abundance.

Profine is the company that owns the KBE brand, along with TROCAL and Kommerling.

In Germany, plastic windows first appeared in the middle of the 20th century. The popularity of plastic windows in Germany and the growing interest in them in other countries contributed to the opening of manufacturing enterprises of German companies, including in Russia.

Three of the most popular manufacturers of PVC profiles have subsidiaries in the Russian Federation: Rehau, Veka, Profine (owns the brands KBE, Trokal, Kemerling). The dominance of German companies in the production and sales of PVC window profiles is the merit of efficient development and expansion.

Relying on the popularity of the brand, however, you can get into a situation where preference will be given in favor of a product of lower quality - since profiles of different classes are produced under the same brand.

1 . To choose the best PVC profile for a window, compare profiles of the same weight category with each other.

Profiles are traditionally divided into three main groups:

There are also special profile systems that cannot be directly compared according to this gradation. For example, there are three-chamber PVC profiles with a mounting depth of 70 mm, or 100 mm (or more) systems with 4 chambers.

2. It is correct to compare PVC profiles according to physical and technical parameters in the certificate of conformity.

For use in the territory of the state, PVC profiles must pass the certification system and receive their quality class according to the test results. Detailed results appear in the annex to the certificate of conformity for a specific system (PVC profile of a specific model).

3. It is correct to compare not only the PVC profile itself, but also to know the manufacturer: what materials are used in the window, in addition to the PVC profile.

The best windows are produced by an experienced manufacturer using quality and proven components.

Often, even the best profile can be spoiled by unreliable thin-walled reinforcement, poor-quality welding, and a poorly assembled structure at the factory.

Pay attention to fittings, double-glazed windows and other structural elements.

4. Trust installation to professionals. The quality of installation ultimately determines: how long and how well the window will work.

It is better to entrust the installation to an experienced team of installers or a specific specialist.

You should not pay for a quality product if the installation will be carried out by unskilled workers. The installation scheme itself and the stages of its implementation are also described by regulatory documents. For example, the installation of windows according to GOST and the installation of plastic windows in a wooden house differ in stages and preparation.

The place of traditional wooden window frames is increasingly occupied by plastic systems, which in the vast majority of cases have proven themselves from the best side. Unlike wooden windows, PVC windows are characterized by high energy-saving qualities, ease of maintenance and aesthetics. The material is not subject to biological decomposition, does not react with changes in size to changes in humidity and temperature, and is not a breeding ground for microflora or insects.

Before homeowners who decide to make such a replacement, the question certainly arises as to which plastic windows are better to install. The fact is that with all the external similarity, not everyone has the same qualities. Much depends on the right design, on the profile features and type of double-glazed window, on the component manufacturer, on the local window manufacturer and on the professionalism of the installer.

The main criteria for choosing plastic window structures

For the manufacture of plastic window structures, special standards have been established, which must be met by profiles for the manufacture of frames, seals, fittings, double-glazed windows. If the manufacturer adheres to the established rules, then plastic systems will provide a home not only with light and warmth, but also will not harm the health of the people living in it.

• The first step is to select the profile manufacturer. The choice will be optimal if it is a well-known brand, that is, a company that has been working in this area for a long time and has won the full trust of the consumer. These include VEKA, Rehau, KBE, Montblanc, Deceuninck, Trocal. In Russia, other manufacturers also present their products, whose products also have quite decent characteristics. Nevertheless, choosing a little-known brand, it is worth looking for more detailed information about it. Today it is not difficult to do this, since conscientious companies are not afraid to advertise their products by posting their characteristics on their official websites. But if such information resources are not found, it is better to refrain from such a purchase.

Some large corporations, in order to reduce the cost of transporting blanks and increase sales, open their production lines in different countries, including Russia. These subsidiaries work under the conditions of strict adherence to the standards of the main manufacturer, that is, strict control is carried out at all stages, up to the final system. Of course, if such an opportunity is provided in the region of residence, it is best to use it.

• But still, more often, the final assembly of window structures from components coming from abroad is carried out in the production conditions of a local company that conducts the necessary measurements and subsequent installation. It follows from this that much in matters of quality depends on the equipment, experience, and conscientiousness of the final manufacturer. But this is a separate issue that needs to be considered at the local level.

That is, it is very important to choose a company with the highest reputation for quality in your region. Even if the most expensive profiles and double-glazed windows are used, in case of non-compliance with the standards for manufacturing systems, or with illiterate measurements and installation, the result can be disastrous. Therefore, before contacting a specific window manufacturer, it is worth making inquiries about it from consumers who have already dealt with it, if possible, get acquainted with the work performed that has already been tested by operation.

Prices for plastic windows

plastic windows

• For the manufacture of plastic profiles, in accordance with established international standards, polyvinyl chloride (PVC) is used, which has high wear resistance qualities. The material is resistant to low and high temperatures, to their sudden changes, to ultraviolet radiation, to the effects of household chemicals. He also has very good mechanical strength indicators. The service life of high-quality certified profiles is estimated at least 50 years.
• The number of cameras in the profile. In order for the window structure to perform its functions qualitatively, when choosing a profile for the manufacture of windows, this important characteristic must be taken into account.

• The necessary rigidity to the plastic profile is provided by metal inserts specially designed for this purpose, which are located inside. It is better not to purchase profiles without such inserts (and they are found).
• Glass block construction. It is important to choose the right number of chambers in a double-glazed window installed in the frame, otherwise the window will not be able to keep heat in the rooms. The choice of a double-glazed window is also carried out depending on the winter temperatures of the region. The glass forming the glass block must have a thickness of at least 4 mm, a smooth surface and a high degree of transparency.
• Elements of fittings. The durability and ease of operation of window systems will depend on the quality of the fittings. Experts recommend choosing fittings made by European manufacturers, as they meet international standards and, as a rule, have an EU quality certificate.
• Seals. These elements of the system ensure the tightness of the window structure, so it is also important from what material and with what quality they will be made.

The quality of heat and sound insulation of rooms directly depends on all the above criteria for evaluating a window. Therefore, they can be called the basis. But plastic structures from different manufacturers also have individual features.

Read the instructions for, in our new article on our portal.

Characteristics of PVC profiles

To decide on the choice of profile, you need to know what characteristics you should pay attention to. They will be presented in this section of the publication.

• Number of air chambers inside the profile. Products from different manufacturers differ in their characteristics, including the structure of the profile, which can have from two to eight chambers.

The chamber is an empty space, hermetically sealed, located along the entire length of the profile. Immobilized air is an excellent thermal insulator. That is, the more air chambers are provided in the window frame, the warmer it will be. For regions with cold winters, experts recommend giving preference to a profile equipped with at least five cameras.

Prices for popular plastic windows

• Heat transfer resistance coefficient profile. This definition characterizes the insulating qualities of a window structure. For regions with very cold winters, this parameter should be at least 0.95÷1.0 m² · °C / W, and for the European part of the country 0.6 ÷ 0.8 m² ° C / W will be enough. This characteristic of a particular profile can be found on the Internet or you can ask the selling company.
• Wall thickness . This parameter is determined by the section of the profile, and according to it it is divided into two classes - "A" and "B". So, the profile of class "A" is made of polyvinyl chloride with a thickness of 3 mm. It is intended for the production of windows for residential premises. Class "B" includes profile blanks, from which frame structures are made for shops, trading floors, catering organizations, etc. The thickness of their walls is less than 3 mm. In practice, such profiles are often used for household frames, since it is very difficult to check this parameter for each of the assembled products. Therefore, it remains only to hope for the integrity of the final manufacturers of systems.
• Profile width depends on the number of air chambers, and the larger this parameter, the warmer the frame will be. Window profiles from different manufacturers can have a width of 30 mm to 130 mm.
• Internal reinforcement of the profile. According to European standards, a metal plate reinforcing a polymer frame must be at least 1.5 mm thick, and in large-sized structures - at least 2 mm. Due to the presence of a metal insert, the durability of finished systems is significantly increased, as they acquire higher strength. Fittings are attached to the metal plates.

Characteristics of double-glazed windows

A double-glazed window is a hermetic structure assembled from several glasses and installed in a finished frame made of plastic or other material.

• The design of a double-glazed window can consist of two, three or four glasses, respectively, one, two or three air chambers are formed between them. This table shows the thermal resistance of glass units of different designs:

In any window system, a double-glazed window occupies 80% of its area, so the more chambers in a glass block, the warmer the window.

The thickness of the glasses used to create a double-glazed window is 4÷6 mm. by the most widespread for apartments and houses are single-chamber and double-glazed windows with air chambers of different widths. Three-chamber options are used less frequently and, as a rule, only in the northern regions, since a two-chamber design is quite enough for the main part of Russia.

During the assembly of the structure, the air chambers are hermetically sealed with a special composition of rubber-bitumen sealant. In the lower part of each there is a compartment filled with a moisture-absorbing composition, so that when the temperature drops, the inside of the glass does not fog up. Several types of glasses have been developed for double-glazed windows, which are designed to perform certain functions. When choosing windows for your home, you should definitely ask in a company that an order for manufacturing will be made, what glass options they can offer.

• Please note that the distance between the panes (that is, the width of the chambers) in one two- or three-chamber double-glazed window may be different. This achieves the maximum effect of sound insulation. Sound waves "break" in closed spaces of different widths, which eliminates the phenomenon of resonance. Such double-glazed windows will be preferable for those owners whose houses are located in a noisy area, for example, on a very busy street, near highways, railway lines, etc.
• There may be differences in the filling of the double-glazed chambers. Most often, inexpensive air-filled options are offered. However, higher thermal and sound insulation qualities are inherent in packages with chambers containing an inert gas. As a rule, this is argon, although, judging by the reviews, some companies offer krypton or xenon filling, with the highest performance. True, there is already a completely different price level, so such options are hardly worth considering seriously. Yes, and there is no particular need for this.
• Energy saving glazing. In preparation for the installation of glass in a double-glazed window, a special coating can be applied to their surface that can reflect heat into the premises. This option is especially good for homes located in regions with harsh winters.

Prices for double-glazed windows

double-glazed windows

• Sunglasses have a tinted surface coating. can have different intensities and shades, as well as even a mirror, completely reflective surface. This protection helps keep you cool. in the room in summer period. This glass option will be the best option if the windows of an apartment or house face the sunny side.
• Tempered glass is produced using approximately the same technology as automotive glass. If you try to break such a double-glazed window, it will give numerous cracks, but will not shatter into fragments.
• Armored glasses are characterized by a high level of strength and withstand powerful enough mechanical influences. Due to these characteristics, glasses are used not only for the manufacture of double-glazed windows for windows on the first floors, but also for large showcases.

• Reinforced glass includes in its structure a metal mesh with cells of different sizes. Naturally, resistance to mechanical impact or vandalism is greatly increased. True, due to the reduction light-transmitting abilities - transparency is not the same.
• Self-cleaning glasses are equipped with a special outer coating that prevents dust and drip marks. This option is well suited for blind windows installed above the ground floor, which are difficult to clean from the outside without the use of special equipment.

Hardware "filling" of plastic windows

Fittings are called metal parts that fasten and ensure the mobility of the connections of the elements of the window system. Therefore, the duration of operation of plastic windows largely depends on the quality of this equipment.

Well-known European fittings manufacturers produce both high-quality expensive products and economy class parts. Naturally, the cost of windows with one or another set of fittings can vary significantly. And the number of fittings used in the design may vary, which also affects the cost of the finished product.

The list of the main details that ensure the comfort of using window systems includes:

• Tilt and turn system that allows you to open the window in two positions - hinged and fanlight-folding. Some models of windows can only be opened wide open - this point must be specified when ordering.
• A locking mechanism and a handle that allows you to open and close the sash, fix it in the tilted position, and also close it in the “winter” mode, that is, pull the sash as tightly as possible to the frame, increasing the tightness of the window.
• Locks, stoppers that prevent unauthorized opening, which is especially important if small children live in the house.
• Fastening or bracket systems, e.g. for installing mosquito nets or blinds.
• For the set of accessories used, metal skids and special rollers are included.

Experts recommend choosing windows with fittings manufactured by European companies Roto, Maco, Siegenia-Aubi, G-U and Winkhaus. These manufacturers provide parts that maximize system durability and ease of use.

Seals for plastic windows

For the production of plastic window structures, several types of seals that differ in material of manufacture. To find out which one is better, it is worth briefly considering each of them.

• Most often as a sealant in plastic structures, and, almost all manufacturers use TPE or TPE - an elastic thermoplastic or thermoplastic elastomer. Such material does not have outstanding characteristics, but it is common due to the fact that it is convenient for automatically assembling the profile into a window structure.

This type of seal is easily connected in the corners of the frame, as it has a small radius of curvature. It is easy to give its cross section any, even complex shape. The material is very affordable. In general, TEP has all the qualities that are ideal for a regional system manufacturer, but not for a consumer.

However, a significant drawback of this material can be called instability to low and high temperatures, so it becomes soft when heated in hot weather and quite fragile during winter frosts. In addition, instability thermoplastic elastomer to ultraviolet radiation leads over time to its deformation. The operating temperature range declared by the TEC manufacturers varies from -45 to +80 degrees. In practice, however, its strength "fails" already at -20 ° FROM, and it softens at absolutely non-critical +35 ° С.

• EPDM or ethylene propylene rubber is the second seal option, which has suitable characteristics for service in low and high temperatures. The material retains its original qualities in cold temperatures down to -60 ° FROM, and the upper limit is + 120 ° С. EPDM is inert to UV exposure and precipitation. If a sealant of this type is installed in the window structure, then its cost will be higher compared to TEP.
• Silicone sealant is another material option used by some manufacturers. But it costs more than the first mentioned, so it is not so popular. But it is distinguished by excellent durability, and its operating temperature range is from - 80 to + 200 ° С. The silicone seal has good elasticity, therefore it can withstand long and frequent mechanical impacts in the form of the most tight pressing of the sash to the frame. Calmly tolerates the material and natural aggressive influences, including ultraviolet radiation and atmospheric moisture. However, the price of this sealant is about twice as high as that of EPDM.
• The rubber seal is ordinary rubber, so it has all its positive and negative qualities. Much, of course, depends on the manufacturer, who can save on rubber by adding other fillers to the mixture. Violation of production technology will significantly reduce the durability of sealing profiles. Low-quality rubber can dry out in the sun and crack, as a result of which the tightness of the joints of the glass block with the frame will be lost, and visually invisible gaps may appear between the frame and the sash through which cold air will break into the premises.

Due to the fact that the cost of a sealant is approximately only 0.5% of the total cost of a window system, then, if possible, it makes sense to choose the highest quality and most durable option. In this case, it's silicone. It is better to overpay a little right away than to replace the sealing elements a year or two after the start of operation of the windows.

Check out the abundance of options, from our new article on our portal.

Well-known manufacturers of profiles for plastic windows

If as a result you plan to get a high-quality durable product, you should not contact the first available office that positions itself as an experienced manufacturer. The best option would be to order windows in a company with extensive experience. If friends or relatives already have plastic windows and serve without breakdowns and repairs for a long time, you should ask them where they purchased them, as well as the profile of which company was used for them.

The table below shows a few well-known companies that supply their products worldwide.

Company logos	Brief information about profile manufacturers
	"VEKA" is a German company specializing since 1969 in the production of high-quality plastic door and window systems, as well as roller shutters. The manufacturer has subsidiaries around the world - in Belgium and Canada, Great Britain and the USA, China and France, Spain and Poland, as well as in Russia. Products manufactured at a domestic enterprise are labeled "VEKA Rus". Today, VEKA is the world leader in the production of profiles from which window and door systems are made in many countries of the world. The company has set a strict quality standard that all enterprises that are part of the concern or, on a contractual basis, use blanks for the manufacture of systems must comply with.
	REHAU is also a German company with extensive experience in the production of PVC profiles for window and door systems. During the entire period of their fruitful work (since the 60s of the last century), technologists and designers of the company are constantly engaged in innovative developments of energy-saving profiles, being in many ways a “trendsetter” in that area of ​​the market.
	German company "KBE" produces a profile, as well as window and door systems, which can safely be given the third place in popularity in the Russian market. Started in 1980, KBE is a pioneer in the use of high-tech extrusion methods that enhance the strength characteristics of profiles. Since 1995, KBE began supplying components to the Russian market and immediately gained popularity among Russian manufacturers of window structures. Today the company has two factories in the Russian Federation that produce profile systems that are completely identical to those manufactured in Germany. Products fully comply with the evaluation criteria of Rossstroy. Due to the high authority of the brand, KBE specialists are invited to participate in the development of Russian GOST, which regulate the production technology of window systems. Therefore, the products of this company can even be called the Russian standard without much stretch.
	Proplex is a Russian company producing profiles for plastic windows. Highly qualified personnel is involved in the production, the lines are equipped with innovative Austrian equipment. At the same time, the products have an affordable price, calculated on the average domestic consumer. Despite the fact that Proplex profiles can be classified as budget options, they are of a fairly high quality.
	"Montblanc" is an Austrian manufacturer of plastic profiles for window and door systems, which has opened the largest plant for their production in the Russian Federation, which has been operating since 2001. The process of manufacturing profiles is carried out under the strict control of Austrian specialists. The company has developed and produces several types of profiles - these are standard two- and three-chamber products, as well as quite rare and often custom-made profile blanks with five or more chambers. To date, the model range includes seven types of different designs. They are designed for the manufacture of windows used in regions with different climatic conditions.
	"The Deceuninck Group" is an international concern founded in Belgium 75 years ago. During its operation, Deceuninck products have gained popularity not only in European, but also in Russian consumers. A subsidiary of the company operates in the Russian Federation, which manufactures products of no less quality than the original versions. This is confirmed by the creation in the Russian branch of the company of an innovative profile system called "Favorite Space" and received the "Innovation Time" award for the energy efficiency of development. Deceuninck products are ISO certified.
	Trocal- another German company specializing in the production of profiles and finished window systems. The first profiles for multi-chamber structures were produced in 1967. In 1972, the company received a patent for the production of a colored profile from polymethyl methacryl (PMMA). In 1987, the company's engineers developed a corner connecting mount for doors, which later became the standard for all structures. In 2006, the production of combined systems consisting of PVC and aluminum begins. 2008 The first Trocal subsidiary is opened in the Russian Federation. Trocal products have successfully passed certification for environmental friendliness, which is confirmed by the presence of the eco-label "Leaf of Life".
	South Korean company LG was founded in 1947 and has been manufacturing household appliances ever since. In the late 50s - early 60s, the production of plastic products and its raw materials begins, innovative developments are constantly carried out, presented on the markets of all continents. For the last 20 years, the company has been using extrusion plants from the German company "WEBER" for the production of high-quality PVC profiles. In Russia, in 2004, an official representative office of LG was opened.

In order to be able to compare the products of the different manufacturers mentioned above, the main characteristics of the profiles will be presented below, as well as their positive aspects and disadvantages noted by users.

Profiles "VEKA"

The company is engaged in the production of profiles for both standard and non-standard window structures. Available not only in white, but also in color according to RAL standards.

The manufacturer supplies several models of profiles to the Russian market with the following parameters:

The "pros" and "cons" of VEKA products can be summarized as follows:

• Thanks to strict control, products "consist" of solid advantages, which include reliability and durability of operation, a high level of heat and sound insulation, tightness, wide enough range of models, the use of high-quality seal, resistant to high and low temperatures.
• Among the shortcomings, only the high cost of the profile can be distinguished. All other noted "minuses" are caused solely by the lack of conscientiousness of local firms involved in the assembly of window and door structures.

REHAU profiles

In the Russian Federation, the company presents six profile options with the following characteristics:

Advantages and disadvantages of products from the REHAU profile:

• The positive qualities of the products of this company, based on consumer reviews, include high structural strength, excellent heat and sound insulation, a fairly large range of models, resistance to ultraviolet radiation and low winter temperatures. In addition, the profile models "DELIGHT-DESIGN" and "BRILLANT-DESIGN" have vandal-proof qualities.
• The disadvantages of REHAU windows include the limitation on the length of the profiles, that is, it is difficult to choose options for a window opening of non-standard sizes. The high cost of products makes them inaccessible to families with an average income.

There is a large number of fakes on the market, or products made from the REHAU profile, but in violation of established technologies. So the too low price of systems under such a brand should even alert the vigilant buyer.

Profiles and window structures "KBE"

Company "KBE" produces many profiles similar in characteristics, this table shows the most popular of them:

The advantages and disadvantages of the products of this manufacturer include the following:

• Judging by consumer reviews, windows and doors made from KBE profiles occupy one of the leading positions, as they have high strength, long service life without repair and adjustment, as well as aesthetic external data. It should be noted that the products are environmentally friendly, as the manufacturer does not use lead in their manufacture. The manufacturer's warranty for the profile is 40 years.
• The disadvantages of the products of this company is called quite high the cost of products. There have been cases of plastic discolouration towards yellowing under the influence of ultraviolet rays.

Profiles and windows "Proplex"

Trying to keep up with the leading brands and domestic manufacturers. Proplex products are distinguished by an affordable price, and the range is represented by the following profile models:

"Pros" and "cons" of window structures "Proplex":

• The advantages of the profile of this company can be considered high quality products:

Plastic is resistant to very low temperatures, does not turn yellow and does not crack; the profile has an ideal white color;

Long service life;

The structures have good tightness, therefore they perfectly protect the house from the cold and external noise.

• Disadvantages are somewhat outdated profile design, lack of international quality certification, fittings that cause problems.

Montblanc products

This table shows the characteristics of the profiles manufactured by Montblanc:

Positive and negative sides of windows "Montblanc":

• The advantages of the products of this manufacturer can be considered the relative flexibility of the profile, which allows them to be used in the manufacture of frames for installation in arched openings. Affordable cost, interesting product design and durability are also important factors that play in favor of these window structures. Profiles are adapted to Russian conditions - they are resistant to both low and high temperatures. Warranty period of operation is 50 years.
• Of the "minuses" can be called the following shortcomings - the unreliability of fittings, over time, the profile plastic begins to turn yellow, the unpleasant smell of chemicals from the sealant, which lingers for a long time, the lack of a quality certificate.