Quality at Kömmerling
Quality that window manufacturers rely on - and that people have trusted for decades.
Quality is one of the core values of the Kömmerling brand.
For generations, Kömmerling has stood for high-quality window systems, reliable product solutions, and a deep understanding of what windows, doors, and sliding systems must deliver in everyday life.
For us, quality means far more than just a flawless profile. Quality begins with the selection of raw materials and formulations. It continues through development, design, production, testing, and documentation. It is evident in the window manufacturer’s workmanship, in the installation on the construction site, and ultimately in the installed window—for many years to come.
Kömmerling quality is therefore a comprehensive system promise. It combines material expertise, technical precision, tested safety, high energy efficiency, ease of fabrication, durability, and responsibility for the entire product life cycle.
What we mean by quality
For Kömmerling, quality means that our systems meet our customers’ high standards—reliably, consistently, and over the long term. Our customers are window manufacturers who use our profiles to produce high-quality windows, doors, and sliding solutions. They must be able to rely on every system to be dimensionally stable, robust, easy to work with, and technically sound. Because only when the system foundation is right can a window be created that delivers lasting performance.
For end customers, quality means protection, comfort, value retention, and security. A high-quality window protects against cold, heat, wind, rain, noise, and attempted break-ins. It contributes to the building’s energy efficiency, enhances the living experience, and retains its functional and aesthetic value for many years.
For Kömmerling, therefore, quality means: materials with defined properties, formulations with long-term stability, systems with well-thought-out designs, products with high dimensional accuracy, testing processes before and during production, ease of installation for window installers, reliable technical documentation, external testing and certifications, durability in use, and recyclability at the end of the life cycle.
In-house formulation development
The formula for success
Quality begins long before a window profile is produced – it begins with the formulation. That is why Kömmerling has been developing key components of its material formulation in-house for many years.
This includes the stabiliser, which is manufactured in our own specialist compounding facility and supplied to production sites worldwide.
More than 20 years ago, Kömmerling set new standards with the introduction of the lead-free greenline formulation based on a calcium-zinc stabiliser. What began as a sustainable innovation has since become an international standard and a key element of our material quality.
The quality of a formulation is particularly evident in its long-term durability. Our profiles achieve outstanding results in weathering tests and demonstrate consistently high material stability – even under demanding climatic conditions.
To maintain these high standards, we continuously invest in state-of-the-art laboratory and testing technology. Methods such as X-ray fluorescence analysis, IR spectroscopy, thermogravimetric analysis and advanced xenon weathering systems enable the continuous monitoring and further development of our materials.
As a result, every Kömmerling profile leaves our production facilities with a level of quality that is evident from the very beginning.
At a glance
- In-house development of the PVC-U formulation and stabiliser
- Worldwide supply from our own specialist compounding facility
- Pioneer in lead-free greenline technology
- State-of-the-art material laboratories
- Highest material quality through continuous research and testing
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Material quality, stability, durability, recyclability
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Design, structural analysis, seals, accessories, applications
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In-house Window Innovation Centre (WIC), continuous operation, air/wind/water, external certifications
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Processing reliability, clear guidelines, low risk of complaints
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Protection, comfort, energy efficiency, safety, value retention
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Quality starts with the materials
The quality of a window begins long before it is manufactured. It begins with the material. Kömmerling has decades of expertise in the development and processing of PVC profiles. Our formulations, materials, and production processes are designed to create durable, stable, and easy-to-process profile systems. For , it’s not just about short-term technical specifications, but about lasting performance over many years.
Our plastic profiles are developed to meet high standards for thermal insulation, stability, weather resistance, ease of maintenance, and reliability in installation. Even when using recycled materials or alternative raw material concepts, the same principle applies: sustainability must not come at the expense of quality. New material solutions are used only if they are compatible with our quality standards.
This clearly illustrates Kömmerling’s philosophy: We want to become more sustainable, but not by compromising on product quality. We want to become more innovative, but not through half-baked solutions. Quality remains the benchmark against which every development must be measured.
Quality in development and design
As a system provider, we are responsible for the technical foundation upon which window manufacturers produce high-quality building components. That is why we view quality not just in terms of individual profiles, but across the entire system.
A window system must meet many requirements simultaneously: thermal insulation, structural integrity, airtightness, sound insulation, burglary resistance, design, recyclability, workability, and compatibility with accessories, hardware, glass, and installation requirements. These requirements must be taken into account right from the design phase.
Kömmerling systems are consistently designed with their future application in mind. We develop profiles, seals, reinforcements, sills, cladding, and accessories so that they work together seamlessly. It is this synergy that transforms individual components into a high-quality window system.
For us, quality also means that a system not only functions technically but also helps window manufacturers achieve consistently good results. Installation guidelines, technical documentation, and system logic must therefore be structured in such a way that our customers can produce safely, efficiently, and consistently.
PremiSlide 76 Beyond
Quality down to the last detail. Sturdy construction for consistently reliable sliding solutions.
PremiSlide 76 Beyond epitomises quality in system development. Five screw channels, high-quality connectors and a perimeter seal ensure a robust construction and consistently high levels of airtightness. Uf-values of up to 1.2 W/(m²K) complement these quality standards with high energy efficiency. The result is a sliding solution that combines technical performance with reliable and consistent installation.
AluClip Plus
An aluminium finish combined with sophisticated system technology.
AluClip Plus combines a high-quality aluminium finish with a well-engineered system solution. The floating cladding panel compensates for thermal movement between the PVC-U and aluminium, thereby ensuring long-term functionality in changing weather conditions.
At the same time, the fault-tolerant design simplifies installation and helps to ensure consistently high quality in production.
Kömmerling quality is evident not only in the high-quality appearance of the finished window, but also in the well-thought-out system design. It helps window manufacturers to consistently achieve high-quality results reliably, efficiently and with a high degree of process reliability.
Tested quality: Developed internally, verified externally
Quality requires trust. Trust is built through experience, but also through testing, documentation, and independent verification.
Kömmerling operates using established quality management processes and is ISO 9001 certified. This makes it clear: Quality is not just a standard, but an integral part of our organizational structure.
In addition, products and systems undergo intensive internal testing. At the Window Innovations Center in Pirmasens, prototyping, window and system testing, as well as design and product development tasks, are centrally supported. These include, among other things, test benches for air, wind, and water tests, endurance tests, and a climate chamber for simulating climatic stress cycles.
Such tests are crucial for high-quality window systems. Windows are opened and closed every day. Over the years, they are exposed to UV radiation, rain, temperature fluctuations, wind loads, and mechanical stresses. Quality is therefore evident not only when the product is new, but above all in its long-term performance.
In addition to internal testing, we rely on external testing, certifications, and approvals from recognized institutes. This provides our customers with additional assurance that our systems have been tested and documented in accordance with recognized standards.
Certified Quality
Internationally Tested. Proven Worldwide.
At Kömmerling, quality does not end with our own testing. Our window profiles are regularly tested by independent institutes and certified in accordance with internationally recognised standards.
In addition to comprehensive weathering tests, external testing bodies continuously verify the chemical, physical and mechanical properties of our profiles.
Our systems naturally comply with the requirements of DIN EN 12608-1 and RAL-GZ 716. In addition, they are regularly tested and certified in accordance with other recognised national and international standards, including RAL, CSTB, AENOR, ATG, ÖQA, BSI and KOMO.
Beyond Europe, Kömmerling profiles also meet important international requirements, including AAMA in North America as well as standards and regulations in Australia, New Zealand, Türkiye and India.
For our customers, this means recognised and regularly verified quality – providing a reliable foundation for long-lasting windows and sustainable market success.
At a glance
- Regular testing by independent institutes
- Compliance with DIN EN 12608-1 and RAL-GZ 716
- Recognised certifications and quality marks, including RAL, CSTB, AENOR, ATG, ÖQA, BSI and KOMO
- Compliance with additional international standards, including AAMA
- Reliable quality for fabricators, trade partners and building owners
Quality for window manufacturers
For window manufacturers, quality is valuable when it is evident in their day-to-day work. Our systems are designed to be processed precisely, reliably, and efficiently. Dimensional accuracy, system compatibility, well-thought-out processing specifications, reliable weldability, stable constructions, and clear technical documentation are crucial for this.
A good window manufacturer needs a system they can rely on. They must be able to produce with predictable costs, help avoid complaints, meet their customers’ high quality standards, and operate profitably at the same time. This is exactly where Kömmerling’s quality comes into play: We aim to provide the foundation that enables window manufacturers to produce high-quality windows consistently.
In doing so, we focus particularly on partners who themselves have the highest quality standards. Window manufacturers who actively promote quality in the market need a system provider that supports this commitment technically, organizationally, and communicatively. Kömmerling is the right brand for precisely these partners.
Quality for end customers
For end customers, quality is visible and tangible in everyday life. A high-quality window protects the home. It reduces heat loss, improves living comfort, can enhance sound insulation and security, promotes a pleasant indoor climate, and helps maintain the property’s value. At the same time, it should remain easy to maintain, functional, and visually appealing for many years.
Kömmerling quality therefore means that windows and doors should impress not only at the time of purchase, but throughout their entire lifespan. The best quality is the kind you use every day—without having to constantly question it.
This also includes durability. A durable window is both economically sensible and sustainable. It spreads the use of raw materials over a long service life, helps save energy for many years, and can become part of a material cycle again at the end of its life cycle.
Quality in safety, thermal insulation and comfort
Modern windows and doors are expected to do more and more. They should protect, insulate, enhance the design, open, close, ventilate, and seal—all while meeting high standards for design and sustainability.
Kömmerling 88
Quality becomes measurable. Premium performance in one system.
Kömmerling 88 combines the key quality features of modern window systems in a single platform. High thermal insulation with Uf-values of up to 0.95 W/(m²K) as standard, glazing depths of up to 58 mm, high stability, as well as solutions for sound insulation and burglar-resistant designs up to RC 2, create a system foundation that delivers consistent performance over the long term. In this way, quality is not only visible but can also be verified on the basis of concrete performance figures.
High-quality profile systems help reduce heat loss and improve energy efficiency. Especially in new construction and renovation projects, the energy performance of windows is a decisive factor for living comfort, operating costs, and CO₂ emissions.
Security:
Windows and doors are vulnerable points in a building’s envelope. Through sturdy construction, appropriate reinforcements, suitable hardware, and tested system solutions, modern elements can contribute to burglary protection.
Air tightness and comfort:
Good sealing systems help keep wind, rain, and drafts out. They improve comfort and help ensure that a building remains efficient and comfortable over the long term.
Sound insulation:
In many living situations, quiet is a key quality factor. High-quality window systems provide the foundation for solutions that can effectively reduce outside noise.
Design durability:
Color, finish, and shape should remain appealing over time. High-quality surface treatments help protect window profiles from the elements and preserve their visual appeal in the long term.
Surface quality that lasts
High-quality surfaces play a key role in ensuring the long-term quality of a window. With AcrylColor and proCoverTec, Kömmerling offers surface solutions that combine durability, protection and a high-quality finish. With proCoverTec, a special coating process using an innovative paint ensures colours that remain beautiful and vibrant over time. AcrylColor impresses with a permanently bonded PMMA surface that offers high colour brilliance and weather resistance. This ensures that the window’s high-quality appearance is preserved for many years, and its premium quality remains visibly evident over time.
Kömmerling quality is evident not only in technical performance figures, but also in the fact that its windows retain their high-quality appearance and value over the long term.
Quality Management
Quality is a system
At Kömmerling, quality is not a matter of chance – it is the result of clearly defined processes. Our quality management system, certified in accordance with DIN EN ISO 9001, supports every stage of the process, from the development of new systems and procurement through to production and delivery.
Quality management is about more than compliance with standards. It provides the foundation for consistently high product quality, reliable processes and continuous improvement. Regular audits, comprehensive testing and complete documentation ensure that our high quality standards are maintained over the long term.
At the same time, we continuously develop our processes. Practical experience, customer feedback and internal analyses are incorporated directly into improvement measures.
In this way, we ensure the consistently high quality of our products every day and provide our customers around the world with the confidence they can place their trust in Kömmerling.
At a glance
- Quality management in accordance with DIN EN ISO 9001
- Clearly defined processes across the entire value chain
- Regular audits, testing and continuous improvement
- Complete documentation and traceability
- Reliable quality for customers worldwide
Quality and sustainability go hand in hand
Quality is a key prerequisite for sustainability. A product that lasts a long time, saves energy, can be repaired or maintained, and can ultimately be recycled makes significantly better use of resources than a short-lived product.
That is why durability is an important contribution to sustainability for Kömmerling. Our systems are designed to function for many years and help reduce the energy consumption of buildings. At the same time, we are working to return materials to the circular economy and enable the production of new profiles using recycled content or alternative raw material concepts.
One example of this is Kömmerling ReFrame. This demonstrates that quality and the circular economy can go hand in hand: a profile made from recycled plastic is combined with a high-quality surface to bring together technical properties, design, and protective function.
Recycling without compromising on quality
Kömmerling ReFrame combines quality and sustainability in a single system solution. The profile body is made from 100 % recycled PVC-U and is finished with the coloured proCoverTec surface. This ensures exceptional UV resistance and IR reflection, thereby helping to maintain a consistently high-quality appearance and performance over the long term. ReFrame thus demonstrates that, at Kömmerling, the circular economy is not seen as a compromise, but as a high-quality system solution offering outstanding product quality.
Quality and innovation go hand in hand
At Kömmerling, innovation is only successful if it meets our quality standards. We bring solutions to market not because they are new, but because they are fully developed and create real added value.
An innovation must prove itself in practice. It must be easy for window manufacturers to work with. It must function properly in the finished window. It must meet our standards for durability, safety, and sustainability. And it must be tested thoroughly so that our customers can trust it.
This is what sets Kömmerling quality apart from short-term trend-driven marketing. We develop with foresight. We test with care. And we focus on the long-term benefits for our customers.
Quality and trust go hand in hand
Trust is not created through promises, but through reliable performance. Quality provides the foundation that enables customers, partners and fabricators to rely on Kömmerling for many years.
Quality is not only reflected in the finished product. It begins with development, continues through clearly defined processes and is supported by testing, certification and continuous quality control. This creates the confidence that our systems and solutions consistently deliver what they promise.
For Kömmerling, trust is therefore the result of consistently applied quality. Only when products perform reliably, processes are transparent and performance commitments are consistently fulfilled can long-term partnerships be built and a brand established that customers can rely on for generations.
Bringing quality, innovation, sustainability and trust together
Quality at Kömmerling is not an isolated value. It provides the foundation that enables innovations to endure, sustainability to succeed over the long term and trust to grow. Innovation creates new solutions. Quality ensures they deliver lasting performance. Sustainability takes responsibility for resources and future generations. Trust is created when all of these values are consistently put into practice.
Only by considering quality, innovation, sustainability and trust together can Kömmerling deliver what it stands for: high-quality, future-oriented system solutions for better windows, doors and buildings.
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Kömmerling stands for lasting quality that window fabricators and end users can rely on.
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Kömmerling develops practical innovations that provide genuine added value for window fabricators and buildings.
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Kömmerling stands for sustainable window solutions through recycling, durability, and energy efficiency.
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Trust is the foundation of all relationships and decisions at Kömmerling.
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