About the Choice of Good Windows

Aging wooden windows and frames no longer meet your increased demands for better heat and sound insulation. You may need to replace them with new, more modern and better.

The market offers a wide variety of manufacturers, types and systems profiles and glazing at different prices. It is difficult for customers to navigate without knowing some basic things.

Firstly, you should choose the type of windows.

The advantages of the wooden windows are that the wood is a natural material, ecological, declining in most heat transfer. The type and variety of colours: cherry, ash, oak, pine, provide comfort, warmth and style to your home. But to fulfill the high requirements for better windows, the manufacturer must have the finest types of wood, treated by special technology, so as to exclude deformations during operation.

There is a widespread opinion that the plastic windows are the best option for renewal of the old wooden frames. Plastic is an organic material and, if not met high standards of composition and processing of the material, there is danger after some time that the frames significantly alter its original form under the influence of climatic conditions and improper maintenance.

In recent years, aluminium had become worldwide as one of the basic materials for the production of doors for residential, and especially for public buildings. According to experts, the aluminium windows are best for European climate, featuring in recent years to a very high temperature range. Over time, the aluminium does not change its appearance, non-toxic, fire – and also an earthquake-resistant. Easily maintained, and the mechanical damages or scratches could be easily repaired. There is variety of profiles with thermal insulating qualities. Aluminium windows allow the implementation of various architectural structures for winter gardens, curtain walls and structural.
Last but not least, the choice of windows has its decent price.

 The value of each element of the windows is determined by the type of material, size of opening, accessories and many other details to be specified, when ordering. Usually if it`s announced a lower price, this may be at the expense of poor materials and accessories. Unfortunately, the majority of the flaws appear only during operation. In that case we like to say, that we`re not too rich to buy chaper.

Read More

Aluminium windows are more expensive than PVC windows and frames

Aluminium is the most popular choice for double glazing to mid 80`s, when it has around 60% of the market share. Since the advent of PVC windows on the market, however, the market share of aluminum windows started to fail. Since 2003rd less than 17% of sales of windows are aluminium made. There are many reasons to explain the decline in its popularity – and there are some very good reasons for choosing aluminum windows instead of PVC or wooden ones.

Aluminium windows are fire-and earthquake-resistant. They are very resistant to temperature changes.

Aluminium as a material does not change over the years. You can even sell it for around a third of its original price if you want to change your windows for good.

The aluminium is a preferred material for interior doors, as it requires a lot cheaper hardware, than it is required for doors, made of PVC.

Aluminium is so strong that it can be used for making roofs, facades, winter gardens and many more. The strength of the material makes it preferable in the construction of protective doors and fire barriers, and many others structures in which the strength of the material is of very great importance for their resistance.

PVC windows are another great option for your home as the windows` profile is made of a material with a low coefficient of thermal conductivity, than aluminium ones. Therefore aluminum profile retains less heat than PVC windows. Let`s put it this way – because of its low thermal conductivity, the PVC profile helps avoid condensation helps keep the house warm in the winter and cool in the summertime.

50% of the thermal losses of a house, come from the walls, floors and ceilings, and the other 50% come exactly from the windows.

Read More

Choosing windows for a home

There are many options for choosing the perfect type of windows for our homes.

In order to ease your choice, we will try to answer the most frequently asked questions.

Which are better: plastic, aluminium, wooden or steel windows?

* Plastic (PVC) windows are the cheapest alternative for your home windows, due to their price and minimum maintenance. Quality plastic windows could be kept in a great shape for decades to come, before you replace them with the next generation of sophisticated windows. If you do not like the white colour, you have many choices – for example wood imitation colour or another. It`s a matter of and aesthetics after all.

The problem with this type of windows could be the limitations, given by the providers, in terms of dimensions and weights of the open elements of the windows. Be considerate with the offers you get by the sellers. Pay particular attention to the most important part of the procedure described in the offer window: type points and lock hardware, and type of reinforcement, used in the profiles. Do not underestimate the type of installation – the number of anchors or joinery details, used for the shape of the windows and the perimeter around them.

The aluminium windows are extremely durable and strong

* The aluminium windows are suitable for homes with modern design and they are used for homes with large glazed elements. Support is hardly necessary, as long as it is made with good quality system and by a well established manufacturer. There are no restrictions for the colours, used for such frames. The wishes of the designers about the size and type of opening could be also justified. Sometimes the choice of such windows is mainly a question of prestige and opportunity.

The steel windows are used for large windows and they are practically stainless.

* The steel frames, used for windows are dedicated for connoisseurs, with regard to their application for homes. Their price on the market is significantly higher than the best aluminium and plastic windows. In some cases, the steel frames remain without an alternative – because they are made from stainless steel and they appeared to be suitable for large windows and very serious opening units.

Read More

Tips for maintenance, upkeep, proper ventilation and cleaning of different types of windows


If the walls of the windows have not yet been plastered – do not remove the pads between the masonry and frame – they ensure flawless functioning of the wings of the window and they should not be removed. The pads should remain in the plaster.

After completing the installation, please clean the bottom frame using a vacuum cleaner with a peaked nozzle. Any metal shavings left over from the installation can cause the appearance of rust.

After installing the windows you can remove the protective film (tape). In any further repairs in order to protect the windows against contamination, you should use the foils recommended by the manufacturer of the windows.


Quality hardware has been installed on your purchased windows. Beware, that the handle of the window to be always in a vertical position (up / down) or horizontally.

Leaving the handle in an intermediate position can cause a wrong opening (with the exception of cases, in which is mounted a special casing, providing a slot for ventilation). It may happen, that in the upper opening position of the sash the same can be rotated on a vertical axis. Do not be afraid! The so-called “scissors” of hardware retain the wing at the top. Move the handle up (position of the upper opening), close the window and then turn the handle in a horizontal position (open along a vertical axis).

Sash, according to the type of the fitting should be closed always as follows:

  • Closed – handle vertically downwards;
  • fully open – handle horizontally;
  • ventilation – the handle straight up – only when the wing has a combined hardware.

For proper functioning of windows` moving parts (hardware), they should be lubricated with oil (acid-free) at least twice a year.

Never, however, lubricate the following items:

  • camps sliding hardware;
  • backs of the hinges and fittings for the double plane opening;

Do not hang anything (except the blinds provided for the purpose, with a certain weight) on the window casement – this may lead to difficulty closing, creep and other problems.

Read More

We offer production and installation of aluminium and PVC windows and frames

Low prices and the completion will be always on time.

Only KozijnPro can offer the best prices in the Netherlands for windows for your home.
Check out this site where you can discover the best prices for doors and windows for your home.

Only if you trust KozijnPro you will receive services at the highest level. The delivery is nationwide and you can get proper installation of the windows and frames.
You live in the Netherlands and you want to change your windows. Here you will find the best deals that will suit you.

Only KozijnPro and its suggestions can offer you incredibly beautiful frames at a good price.
Want to have new windows? Only by KozijnPro you can get the perfect new windows.

Different types of PVC windows. Better choices and always a good price. Only at KozijnPRO.
We offer fast delivery and installation of different types of doors and windows. With our doors and windows you will feel safer.

Want new doors and windows? Contact us to get the best windows and frames for your home.

Read More

What kind of windows to choose – aluminium or PVC?

PVC windows


Polyvinyl chloride has a lower coefficient of thermal conductivity, which means that it retains heat better in the room, as this effect depends on the profile (the area of ​​the profile is an average of about 15-20% that of the entire window – so, it`s not very crucial to the overall heat effect).


PVC windows age more rapidly than the aluminum (from 20 up to 30 years), because it`s made of organic elements. For the same reason, it`s more susceptible to the vagaries of climate, and in case of huge temperature amplitudes the structure of the material breaks down and the profile gets easily distorted.


PVC windows are manufactured and installed more easily, because of the nature of the material itself, which, of course, is softer and flexible than aluminum.


Due to long exposure to the sun the material of the windows wears down and gets yellow.


PVC joinery requires minimal maintenance – requires no painting, treat with special liquids, and it could be clean simply by washing with a soft cloth and soap.


PVC profile has a large linear expansion – 2-3 mm per meter (depending on the origin and it might get even larger).


Production of PVC profiles requires less investment, which ultimately lowers the cost of the windows.

PVC windows have less condensation than aluminium ones. Anyway, if there is humidity in the room above 60%, the moisture condenses less on the profile and easily on the glass, cold walls and corners.

PVC windows enable insertion with multipoint locking affordable. This type of hardware, except the resistant effect, allows for more precise adjustment of the hinges.

Corners of PVC windows are glued, which prevents the room from the air flow, but … on the other hand makes impossible the importation of large crates (for portals, for example) in most of the rooms.

Read More

An Option for the Windows of Our Home

Good and durable windows are another important factor for the energy savings of our homes. The windows literally eat up our heating resources. One square meter of aluminium windows draws from 200 to 600 watts per hour. Imagine then, the energy that is needed for a window with the size of 4 square feet.

These losses do not apply only to the single windows. New ventilated windows with a single thermal draw from 80 up to 160 watts per m2 per hour. However, with the condensation that may occur formed the energy exceeds up to 100 watts per meter.

The greatest disadvantage of these windows is that they completely seal the room. They do not allow a flow of fresh air in the room and it feels like you cannot breathe. This is the so-called air and vapour-permeable effect.

You can still count on the PVC windows, which produce less condensation on the walls and they are energy efficient. Note, however, that depending on the model, the system itself and the type of the windows, the best windows and frames especially for your home are the ventilated windows. They let some fresh air in the rooms and do not produce as much water vapour condenses as the other two types.

Nowadays you can buy ventilated windows and frames, as they are designed for any type of rooms and homes. The aluminium double thermal and PVC ventilated ones are the best option for you. They provide free flow of air and water vapours. If you have already installed aluminium windows and have experienced the effect of vacuum while opening the door, then there is a way to solve this problem.

You can get more information, regarding the new windows and frames by visiting the best dealers.

Read More

The Advantages of the PVC Windows

The PVC windows and frames have advantages, which are unbeaten, when comparing with the other types of windows` profiles, such as wood and aluminium. These are:

  • Economy
  • Insulation
  • Soundproofing
  • Attractive appearance
  • Easy maintenance


Our homes lose up to 37% of the heat, due to poorly insulated windows. Professional placement and quality PVC windows guarantee, that you could reduce the loss up to 2 times.


The degree of insulation depends on the type of the glass, its thickness and the distance between the panes.

Soundproofing Effect

For better soundproofing results the best manufacturers of the windows use profile systems with 3, 4 and 6 cameras that provide good insulation of window systems.

Attractive Appearance

PVC profiles, which are used have modern design. This adds sophistication and elegance of the final products and allows various configurations for the interior design of the house. The companies offer white, colored or imitation wood PVC windows, and add of large assortment of laminated profiles.

Easy Maintenance

For cleaning windows it`s highly recommended to use sponges and soft tissue fibers and special ingredients that easily remove dirt from the surface of the PVC profiles, for the folds, windowsills and visors. For quality wash you can use plain soap solution.


Use of detergent with highly abrasive elements is not recommended for plastic and glass surfaces. For better and more effective cleaning of your PVC windows, please read the instructions carefully and use the recommended detergents. In compliance with the basic rules of maintenance of PVC windows they will serve you longer and you will be satisfied with its flawless appearance for decades to come.

It`s easy to get what you want, as you can find the best options for PVC windows on the market. PVC is forever and you will be fully satisfied with the best material for windows money can buy.

Read More

Ways to Choose Fine Windows

What do you actually need to know, when choosing windows for your home?

The first and on the most important thing is to decide what type of material you want your windows `profile  made of- whether from wood, aluminum or polyvinyl chloride (PVC).

They all have their advantages and disadvantages. There are several reasons why the most popular and preferred product in Europe is PVC. Latitude and location, climate and seasonal changes, the combination of thermo-insulating parameters, price and options for the design and implementation of complex combinations are only some of the components determining the choice of PVC profile.

Another advantage of PVC profiles are that they are installed very easily and they are easy maintained. PVC windows have excellent thermal and sound insulation properties, which is very important. Material, used for their production is cheaper, than aluminum and wood profiles and allows many choices, regarding the choice of design and colour. Colour combinations, and highly successful imitation of the wood are definite a plus, when choosing your new PVC windows.

There are concerns that over the years and with exposure to sunlight the PVC profiles could get yellow and experience changes in the structure. But in recent years the established and quality manufacturers rely increasingly on profiles of famous brands, which successfully combine the production of qualitative and reliable final products, through production and stabilization of the profiles in an innovative and environmentally friendly way.
Fitting of the windows is simply and easy and does not require rearrangement of the house. You can choose how to open your windows, but keep in mind that if you choose a combination of opening the horizontal and vertical axis, this will facilitate the ventilation of the rooms and it`ll be easier to clean the PVC profiles as well.

Read More

Good Housekeeping

Caring for your home is very important, in order to obtain and prolonged the house`s effectiveness. Important thing for any house is what type of windows to choose. Today we are lucky, as we experience an increase in the production and selling of good windows and frames.

The people are no longer doubted where and how to find the best windows for their homes. The question is what type of profiles to choose, whether wooden, PVC or aluminium.

Choosing windows is like a good housekeeping for your home, because they are the best protection against the unwanted climate changes. People that go for PVC windows like to keep up their houses shiny and protect them against the temperature changes. PVC windows are the best insulators for any room and they even protect against the UV rays, which is very important today. PVC profiles are made of polyvinylchloride, which is better material than the other windows and frames. Its life is forever and it doesn`t bend or get damage from the temperature amplitudes.

Wooded windows are always welcomed as an alternative to modern technological products. Wood is not forever, but it`s natural and never gets out of style. Wooden windows are easy to maintain, while their life is up to 80 years. Wooden windows will make your home look more hospitable and comfortable.

The aluminium profiles are the third major trend in the modern windows` making technology. They are not as strong as the PVC ones, but they are preferred mostly because of their price and remarkable effects of insulation. The good thing is that any customer can choose variety of colours for the aluminium profiles, some of them imitating the wood colour.

If you want your home to get a nicer and neat look, then you should good and quality windows – the first step towards comfort and effectiveness. 

Read More