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DA-77 and DA-FerroLine Aluminum Systems – Explore the Key Differences

Two systems. Distinct features. One shared value: excellence in aluminum design. At first glance, DA-77 and DA-FerroLine may seem similar—but a closer look reveals their unique characteristics. From the architectural freedom of cutting-edge designs to a refined tribute to timeless classics, each system brings a different strength to the table. Discover which one is the perfect match for your home and lifestyle.

21st-century construction presents new challenges for today’s urban planners. Investor demands that only the most forward-thinking architectural solutions can meet. Rising expectations from end users who won’t settle for less. What ties it all together? 
Innovative building materials. In a world where a structure is far more than just its form, aluminum has become a symbol of our era. 
We invite you to explore our recommended systems: DA-77 and DA-FerroLine. Not competitors, but two distinct paths toward a shared goal—the perfect appearance for your windows, uncompromising durability, and long-lasting security. 

DA-77 Series: Design That Works With You 


The DA-77 Series is a next-generation aluminum system built around slim, durable, four-chamber profiles.
Engineered for discerning investors who value every detail, this system delivers optimal thermal insulation (Uw = 0.89 W/m²K*) combined with an extensive range of design possibilities.

Its true strength lies in its versatility. From corner and tilt windows to sliding patio doors—you choose the configuration, and the DA-77 adapts like a custom-fit solution.


  • The DA-77 system is an excellent solution for residential homes, office buildings, commercial storefronts, and large-scale panoramic glazing. This aluminum joinery series also integrates seamlessly into balcony and terrace enclosures, creating bright, comfortable spaces with the added benefit of enhanced burglar resistance. Additionally, the DA-77 HST variant—based on the same profile—is ideal for use as internal partitions or lightweight sliding doors, offering both functionality and modern aesthetics

Discover the Full Range of Models 

The elegant, minimalist aesthetic of the DA-77 Series is enhanced by a wide range of design variants—making this system a true dark horse in contemporary aluminum joinery.

  • DA-77 – standard version 
  • DA-77 (SI) – high-performance thermal variant, compliant with passive house standards 
  • DA-77 – Corner Option – designed for corner window configurations 
  • DA-77 (US) – version with a concealed sash 
  • DA-77 EI – fire-rated system, classified EI 30 
  • DA-77 C – outward-opening model 

In summary: if you’re looking for durable, customized solutions tailored to your project’s needs, the DA-77 Series is the perfect choice! 


DA-FerroLine: Rewriting History in Aluminum

In the last century, steel was the material of choice for architects—used in bridges, viaducts, skyscrapers, and more. Today, aluminum takes its place: three times lighter, corrosion-resistant, and low-maintenance.
The DA-FerroLine system is a tribute to history—a modern reinterpretation of classic steel-look joinery in an ultra-light, durable aluminum form.
With slim profiles, slender lines, and design details reminiscent of traditional steel frames, DA-FerroLine celebrates architectural heritage while enhancing the elements worth preserving for generations to come.

  • The DA-FerroLine system is our top recommendation for the renovation of historic buildings—and for good reason. It allows for frame installation without the need to remove existing window subframes, significantly reducing the risk of damage to the façade. With a low thermal transmittance value of Uw = 1.0 W/m²K, it also serves as an energy-efficient solution that meets the demands of modern building standards—without compromising the character of the original architecture.

Leveraging the many advantages of aluminum, the DA-FerroLine model is ideal for large-scale glazing projects, partition walls, and commercial storefronts.
In summary: it’s the perfect choice for those who want to refresh the beauty of the past without technological compromises—architecture enthusiasts with a soul, advocates of bold interior design, and investors passionate about retro style


Discover the Key Differences – DA-77 and DA-FerroLine Systems 

When choosing the ideal aluminum joinery system, consider: 

  • The desired exterior appearance and design 
  • Intended application 
  • Level of thermal insulation 
  • System construction capabilities 
  • Technical specifications 
  • Available features 
  • Special functions (e.g., fire resistance) 

_______________
*For a 1230 x 1480 mm unit with double-glazed insulated glass featuring a warm-edge spacer and Ug = 0.5 W/(m²K)
**Reference window 1230 x 1480 mm with standard glazing for the series 

Have a question, project, or vision? Show us your idea, and we’ll help you select the system that brings out its full potential! Send us your inquiry, sketch, or technical file, and we’ll thoroughly analyze your needs

Aluminum designs the future. 

Are you ready for a change? A change that resonates with today—and will still feel just as modern 10 to 15 years from now. 

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