GM PLAST windows are ideal for both new construction and renovation.


When you choose our uPVC windows, you are making the best decision for your home. We offer very high quality uPVC windows at the most competitive prices. We manufacture our PVC windows using some of the best German Kömmerling profiles on the market, these are modern and best-in-class PVC window and door systems. With an installation depth of 70 to 88mm, the systems will give you the best possible thermal insulation at up to Uw=0.72 W/(m²K) . In addition, our intelligent fixing technology makes installation quick and easy. With our PVC windows you can feel safe as they have high-quality burglary protection. You will also feel an improvement in your quality of life thanks to the perfect sound insulation of up to 48 dB.


There is no better choice for your next project than our versatile aluminium windows. In these trustworthy systems, optimum functionality meets superior design, security and energy efficiency (Passive House certified). Made from high-quality aluminium, they are durable, damage-resistant and keep you safe thanks to their high resistance to burglary (RC3 class). GM PLAST aluminium windows also have excellent wind and water tightness and resistance parameters (AWW 4/C4/ E900). We use reinforced Reynaers profiles capable of supporting the weight of even very large glazing. The windows have self-regulating air flow, are quick and easy to install and have the added advantage of being modular.


Timber windows are a great choice if you are looking for a beautiful, durable and functional product to enhance the look of your home. With a wide selection of wood species to choose from, you can find the perfect windows to match your interior. They are also easy to repair in case of damage or defects, making them a great investment. Timber windows are also easy to care for and maintain, making them ideal for busy homeowners. With an aesthetically pleasing and elegant appearance, high rigidity and stability, and a large selection of designs and models, wooden windows are sure to add a touch of class to any home. Our wooden windows are characterised by excellent thermal insulation are very durable and functional.

GM PLAST Factory of windows and doors

25 years of experience

Individual approach


Premium windows

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GM PLAST windows

Windows are a key part of your home's thermal and acoustic insulation, but also its level of security and aesthetics. Whether for new construction or renovation. Therefore, they should be of the best quality.

GM PLAST doors

The entrance doors we produce range from the most conventional to the most personalised, always maintaining the highest standard of quality.

Terrace systems GM PLAST
Terrace systems

What distinguishes our sliding doors and windows is the fact that they have sound insulation of 45 db, making external sounds practically inaudible. They also have excellent thermal insulation values.

GM PLAST roller blind

Roller shutters are designed to protect you from the sun's rays, burglary and noise. Fitting them can reduce your electricity bills as they provide extra protection against heat loss.

GM PLAST facade blinds
Facade shutters

Façade blinds are extremely practical sun screens that effectively protect interiors from excessive heat while providing adequate visual comfort.

GM PLAST Pergola

The pergola is a very versatile solution, created to cover large areas. It is certainly a stylish addition that fits in perfectly with modern building trends.

Garage doors
Garage doors

Gates from the GM PLAST offer are functional, solid, safe and solutions matching the appearance to the façade. Garage doors are often one of the key elements of the entire façade.

Window installation Police

At GM PLAST, we realise that installation plays an important role. Therefore, you can order windows with installation from us, which is carried out by experienced specialists with up to 30 years of experience!

GM PLAST mosquito net
Mosquito nets

A mosquito net is the ideal solution to your insect problems. Mosquito nets provide security even when the windows are open ajar.

GM PLAST window sill

The window sills available in the GM PLAST range are made from very high quality materials. They are available in a wide range of colours. They are characterised by high stability and resistance to damage.


What customers say about us

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Contact us for a free quote and we can help you transform your home for the better.


Certified manufacturer

Manufacturer of uPVC windows

GM PLAST is undoubtedly a certified manufacturer of uPVC windows and doors for more than 25 years on the premium brand Kömmerling profile, which is world-famous and a symbol of high quality. Kömmerling is a profile with over 60 years of experience! The high quality of our services and products is also evidenced by the fact that we were the winner of the Consumer Award 2022 in the category Windows - Offer, measurement and installation. We were also awarded the Super Brand certificate in the same category.

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Our Partners

GM PLAST Factory of windows and doors of the highest quality

Top-quality uPVC windows and doors should be made from high-quality profile systems that are UV-resistant. The windows will stand the test of time and serve you for many years. We use the highest quality equipment available. We use the ROTO NX brand for the majority of our hardware and they are probably the number one choice in the world for high performance window and door parts and mechanisms. We are constantly looking for new technological solutions to improve the performance and functionality of our PVC window and door systems. This is why we only use the leading suppliers from profiles to hardware. Our suppliers are technological leaders who guarantee us the highest quality we expect. At GM PLAST we never compromise on quality, which is why we buy and use only the highest quality equipment available.