Quality starts at the source
Founded in 1897, Kömmerling has over a century of expertise in materials science, and more than 73 years of dedicated uPVC innovation. In fact, we pioneered the first uPVC profile system in 1967, setting a new standard in window and door manufacturing. Since then, our materials have continued to evolve, driven by performance, durability, and a growing commitment to environmental responsibility.
Today, our focus is on advancing that legacy through smarter sourcing. We’re leading the shift away from traditional fossil-based compounds and embracing renewable alternatives. One of our most recent developments is the integration of bio-attributed PVC, derived from tall oil—a sustainable by-product of the paper industry. While currently featured in select systems, this innovation highlights our long-term goal: reducing environmental impact without compromising the strength, efficiency, or aesthetic appeal of our products.
From formulation to finish, our raw materials are carefully selected to deliver consistent quality, long-term value, and a smaller environmental footprint.
Safer materials for homes and the planet
The stabilisers used in our uPVC profiles play a critical role in ensuring long-term performance, structural integrity, and weather resistance. At Kömmerling, we’ve made a conscious decision to move away from outdated, harmful additives like lead, and instead use calcium-zinc based stabilisers—a safer, more environmentally responsible alternative.
These advanced stabilisers provide:
Superior thermal stability – essential for withstanding Australia’s harsh sun and fluctuating temperatures.
Improved weathering performance – preventing yellowing, brittleness, and degradation over time.
Non-toxic composition – making our profiles safer for residential environments, including schools, hospitals, and family homes.
Recyclability – aligning with circular economy principles and making it easier to reclaim and reuse materials at the end of their life cycle.
Our lead-free formulation not only meets but often exceeds global environmental standards. It’s another example of how we blend science, safety, and sustainability into every component of our systems.
Locking in stability from the start
Moisture is the enemy of high-performance uPVC. At Kömmerling, every raw material batch undergoes precision moisture control before mixing. We carefully monitor and adjust humidity levels to prevent swelling, warping, or inconsistencies, ensuring the material is perfectly conditioned for mixing and extrusion. This step is crucial for profiles that withstand Australia’s harsh climates, including coastal and high-humidity zones.
How We Ensure Superior Moisture Protection:
Precision Extrusion Technology
Delivers a smooth, dense, and non-porous surface that naturally repels moisture and resists absorption.
Thermal Stability Assurance
Each profile is tested to perform in extreme heat and cold, ensuring no compromise in structural integrity over time.
Integrated Sealing Systems
Engineered for airtightness and water resistance, our high-quality sealing solutions help maintain the profile’s dry core and overall strength.
The perfect blend for performance
Once moisture levels are optimised, raw materials are combined in our state-of-the-art mixing plants. Here, rigid or recycled PVC, lead-free stabilisers, colour pigments, and recycled content are blended into precise formulations tailored for each profile system. This process guarantees consistent quality, long-term durability, and superior performance while integrating up to 30% recycled material into select products—supporting both sustainability and strength.
Specially engineered for heat, sun, and humidity
To withstand Australia’s harsh climate, every Kömmerling profile can be formulated with our Hot Tropical Mix. This advanced compound is specifically designed to prevent warping, yellowing, and degradation under extreme heat and UV exposure.
By adjusting stabilisers, pigments, and additives during the mixing stage, the Hot Tropical Mix ensures:
Thermal stability – Profiles retain shape and strength even in the hottest regions.
UV resistance – Prevents yellowing and maintains colour over time.
Long-term durability – Extends the lifespan of windows and doors, reducing replacement and maintenance.
This innovation ensures that Kömmerling windows and doors perform reliably across coastal, inland, and tropical regions, providing homeowners with long-lasting, low-maintenance solutions.
Transforming the blend into high performance profiles
Our advanced extrusion lines shape the blended uPVC into smooth, dense, and non-porous profiles. Temperature, speed, and pressure are carefully controlled to maintain structural integrity and dimensional accuracy. The result is a profile that naturally resists moisture absorption and performs reliably over decades.
Global Programs , Local Actions
At Kömmerling, sustainability isn’t an afterthought, it’s built into the DNA of our manufacturing. Throughout the process, offcuts, production scrap, and surplus materials are captured and reintegrated into new formulations. In Australia, our ReKonvert program collects offcuts from fabricators, returned products, and installation waste, contributing recycled content to profiles without compromising quality. This circular approach reduces waste while maintaining high performance and environmental responsibility.
Every profile proven before leaving the plant
Final profiles are rigorously tested for thermal stability, moisture resistance, structural integrity, and weathering performance. Each profile meets Kömmerling’s exacting standards, ensuring windows and doors that are built to last, low-maintenance, and high-performing.
After extrusion and testing, Kömmerling profiles can be customised in our lamination centres. Here, profiles receive their final aesthetic treatments, including:
Bespoke colours – natural tones, woodgrain finishes, or metallic sheens tailored to your design.
High-quality lamination – durable surface coatings that enhance visual appeal and long-term resistance.
UV protection – ensuring colour and finish remain consistent even under Australia’s harsh sun.
This step combines Kömmerling’s advanced materials with local finishing expertise, allowing homeowners and builders to achieve both performance and style.
From Kömmerling profiles to your finished windows
Once profiles leave our facilities, they are distributed through an exclusive network of trained, audited, and equipped fabricators across Australia. These fabricators:
Are fully equipped to cut, weld, and assemble windows and doors to precise specifications.
Receive training on Kömmerling systems to ensure quality, efficiency, and long-term performance.
Follow strict quality and sustainability standards, ensuring every finished window or door meets the expectations of homeowners, architects, and builders.
This final step ensures that Kömmerling profiles not only perform in the lab but deliver reliable, high-quality windows in homes and buildings across the country.
Explore our full range of German-engineered windows and doors, designed to deliver superior performance, versatility, and style for every project.
