Secco Sistemi OS2 65 Steel Windows – Premium Thermally Broken Steel Frames by Portamet
Architectural steel windows designed in Italy, built with Polish craftsmanship. Portamet is a leading steel windows manufacturer in Central/Eastern Europe and the USA. We specialize in Secco Sistemi OS2 65 steel windows – a high-performance, thermally broken system with ultra-slim profiles that maximize glass and daylight. Our global production and shipping mean we deliver custom Secco steel windows worldwide, backed by ISO9001 and CE-certified quality
Benefits of OS2 65 Profiles
Ultra-slim Sightlines: The OS2 65 system uses only 27 mm visible side frames with a 62 mm central meeting stile. This exceptional thinness “dematerializes” walls and floods interiors with light. Architects and homeowners love the modern look and expansive views enabled by 40+ profile options.
Thermally Broken Efficiency: OS2 65 is fully thermally insulated, using multi-chamber polyamide/polyurethane barriers between inner and outer steel. Coupled with up to 40 mm glazing, this achieves passive-house-level performance (U-values ~0.6–1.2 W/m²K with triple glazing)portamet.cominspiredaluminium.co.uk. In practice, Secco’s thermally broken steel windows keep buildings warm in winter and cool in summer, cutting energy bills.
Versatile Openings: It is the only Secco profile series that supports every window/door type on the market. Choose side-hung (casement), tilt-turn, lift-slide, bi-fold, pivot, or even retractable insect screens and security variants – all with the same slim sightlinesportamet.cominspiredaluminium.co.uk. Over 40 frame and sash profiles allow complex shapes (arched, corner, fixed panels) for any architectural design.
Extreme Durability: Made of premium galvanized steel, OS2 65 frames resist warping, corrosion and impact. The high-strength steel construction meets rigorous wind-load and security standards. These steel windows “withstand the rigors of time and nature”portamet.com, making them ideal for both modern skyscrapers and historic renovations.
Luxurious Finishes: Secco OS2 can be finished in any powder-coat (RAL) color or natural metal tone. We offer architectural bronze (weathered copper) or Corten steel options that develop a rich patina over time. In fact, Secco’s “precious metal” finishes allow “bronze windows” that age gracefully.
Why Choose Portamet as Your Steel Windows Manufacturer
Global Expertise: Portamet is a trusted steel windows manufacturer serving Europe and the USA. We combine Italian design heritage (Secco Sistemi profiles) with precision fabrication at our Gdańsk, Poland workshop. Every project benefits from EU-quality steel, ensuring top-notch consistency.
Certified Quality: For US projects we offer NFRC energy ratings and even Miami-Dade hurricane compliance. Independent lab tests confirm our OS2 systems meet the highest air, water, and wind class ratings. We provide full documentation so you can confidently specify our windows worldwide.
Architectural Focus: Our team partners closely with architects and clients. We’ve delivered Secco steel windows for historic restorations, custom homes, hotels and office towers alike (see examples below). With 40+ years of experience, we handle unique requests — from matching century-old ironwork to floor-to-ceiling glass façades. In short, Portamet brings global scale and local attention to every steel window project.
Customer Support: From initial design to final installation, Portamet guides you at every step. We handle all customs/shipping logistics and adapt to local building codes. On-site technical advice and a dedicated project manager keep installations smooth. Ready to get started? Our in-house engineering and manufacturing ensure a perfect fit and finish, anywhere in the world.
Project Gallery / Examples
Figure: Bronze-finished Secco OS2 65 sliding doors at a Tuscan villa (Pisa, Italy). Portamet installed these thermally broken steel windows to blend contemporary luxury with historic stone walls. The extra-narrow bronze frames (27 mm sightline) preserve the rustic masonry aesthetic while providing modern insulatio
Figure: Modern lakeside residence (California, USA) featuring Secco OS2 steel windows. Floor-to-ceiling OS2 65 frames in matte black flood the living room with daylight. Portamet delivered this custom multi-panel system with triple-glazed units for high energy efficiency (passive-house performance
| Specification | OS2 65 (Secco Sistemi) |
|---|---|
| Visible Frame Width | 27 mm (side profiles) |
| Central Meeting Stile | 62 mm (between sashes) |
| Frame Depth | 65 mm (accommodates up to 40 mm glazing) |
| Glazing Thickness | Up to 40 mm (double or triple insulated glazing) |
| Thermal Break | Yes – multi-chamber polyamide/polyurethane barriers |
| U-Value (approx.) | ~0.6–1.2 W/m²K with triple-glazing (passive-house range) |
| Materials/Finishes | Galvanized steel; optional Cor-Ten, stainless, architectural bronze |
| Coating | Durable powder-coat (any RAL); natural bronze/copper patina |
| Opening Styles | Casement (side-hung), Tilt-Turn, Pivot, Bi-Fold, Lift-Slide, etc. |
| Certification | CE (EN 14351‑1); U.S. NFRC & Miami-Dade approvals available |
Ready to Get Started?
Contact Portamet today for a free consultation and quote. Our experts will help you select and customize Secco Sistemi OS2 65 steel windows to meet your project’s aesthetic, performance and budget requirements. As a global steel windows manufacturer, Portamet is dedicated to delivering innovative, high-quality windows worldwide – and we’re here to make your vision a reality
FAQ – Common Questions
Q: What are Secco Sistemi OS2 65 steel windows?
A: They are premium thermally broken steel-framed windows designed by Secco Sistemi (Italy) and built by Portamet. OS2 65 offers ultra-narrow profiles (27–62 mm) and deep frames (65 mm) that house double/triple glazing. This makes them ideal thermally broken steel windows that maximize glass area while ensuring excellent insulation.
Q: Why choose thermally broken windows like OS2 65?
A: A thermal break (polyamide insulation) separates the inner and outer steel, drastically reducing heat transfer. This keeps buildings warm in winter and cool in summer. In fact, Portamet’s OS2 windows achieve EN 14351‑1 certification and can reach very low U-values (~0.6 W/m²K) when triple-glazed. The result is lower energy bills and comfortable year-round comfort.
Q: Can Secco OS2 steel windows come in bronze or other finishes?
A: Yes. Secco OS2 profiles are available in architectural bronze (weathered brass/copper), as well as Corten (weathering steel), stainless steel, or any powder-coat color. Portamet can supply OS2 65 frames with a rich bronze patina or custom RAL paint. Many clients request “bronze windows” for a luxurious, aged look.
Q: Does Portamet ship steel windows worldwide?
A: Absolutely. Portamet fabricates all Secco OS2 65 windows in our Gdańsk, Poland workshop (using certified European steel) and then ships them internationally. We regularly deliver to both the EU and USA, including projects in the USA that require NFRC energy ratings and Miami-Dade impact compliance.
Q: What types of openings and glazing does OS2 65 support?
A: OS2 65 supports every common opening style – side-hung (casement), top-hung (tilt), sliding, bi-fold, pivot, etc. You can mix fixed panels with operable sashes. The deep 65 mm frames accept double or triple-glazed units up to 40 mm thick, providing flexibility for both high insulation and large glass areas.
Q: How can I request a quote for Secco OS2 65 windows?
A: Simply contact Portamet through our website or email. We’ll discuss your project needs and provide a free, no-obligation quote. Our team will help you specify the right OS2 65 configuration (frame color, hardware, dimensions) and guide you through the ordering and installation process.