Secco Sistemi OS65 Corten Steel Windows: Timeless Beauty in Weathered Steel | PORTAMET

Описание: In architectural design, materials matter just as much as form. Among the most compelling choices available today is Corten steel, a weathering steel that develops a distinctive rust-like patina over time. When paired with the refined engineering of Secco Sistemi OS65 window profiles, this material becomes the foundation of truly extraordinary fenestration—blending industrial heritage with contemporary elegance.

The Allure of Corten Steel in Modern Architecture
Corten steel, also known as weathering steel, is designed to age gracefully. As it oxidizes, it forms a protective patina that changes in texture and tone, giving each project a unique character. Architects choose Corten not just for its appearance but for its durability, low maintenance, and rich architectural expression.

When applied to windows, Corten steel provides a bold alternative to standard black steel or aluminum. It’s particularly powerful in designs that seek to connect the built environment with natural landscapes, materials, and the passage of time.

Introducing Secco Sistemi OS65
Secco Sistemi is one of Italy’s premier manufacturers of high-performance window and door systems in architectural metals. The OS65 series is a minimalist thermally broken profile system engineered for slim sightlines, excellent insulation, and material flexibility—including Corten, stainless steel, bronze, and painted galvanized steel.

Key Features of Secco OS65:
Minimal face width of just 27 mm for fixed frames, and 65 mm for operable units

Thermally broken construction for energy efficiency

Concealed drainage and minimal visible profiles for a clean, architectural look

Designed for high-performance glazing up to 48 mm thick

Available in Corten steel, which develops a warm, rusted finish over time

With OS65, you can enjoy the aesthetic purity of Corten steel without compromising on thermal performance or durability.

Why Choose Corten Steel Windows?
1. Unique and Evolving Aesthetic
No two Corten surfaces age the same. Over time, the material’s reddish-brown patina deepens and changes, creating a facade or window frame that seems alive—changing with weather, light, and atmosphere.

2. Architectural Harmony
Corten windows harmonize beautifully with natural materials like stone, wood, and concrete. They’re ideal for both rural retreats and urban renovations where character and context matter.

3. Resilience and Longevity
Once the patina forms, Corten is highly resistant to atmospheric corrosion. It's an excellent material choice for long-term exterior use—even in harsh climates.

Applications and Aesthetic Use Cases
Secco OS65 Corten steel windows are ideal for:

Luxury residential architecture: From rustic-modern villas to mountain lodges

Hospitality projects: Boutique hotels that embrace raw textures and timeless materials

Cultural buildings: Museums, galleries, and art centers seeking sculptural details

Renovations of industrial buildings: Retaining character while improving performance

Because of the slim sightlines and versatile configurations of OS65, these windows can be used for fixed frames, casement windows, awnings, and even custom pivot systems.

Thermal Breaks, Modern Standards
Corten may speak to the past, but Secco Sistemi OS65 is fully modern. Thanks to its thermally broken structure, this system meets or exceeds international energy efficiency standards:

Uf values starting from 1.8 W/m²K

Compatibility with double or triple glazing

Full compliance with European and North American thermal codes

So, while the exterior expresses timeless materiality, the performance is future-ready.

Seamless Detailing, Italian Precision
Secco is known for elevating architectural metals through refined detailing. In OS65, the visible joints are minimal, and the transitions between steel and glass are clean and crisp. Combined with the natural texture of Corten, the result is a window that feels hand-crafted and architectural in every sense.

Finish Options and Patina Development
Secco’s Corten profiles arrive pre-oxidized and stabilized, ready to continue patinating naturally once installed. You can choose from:

Raw Corten, for full atmospheric development on-site

Pre-patinated and sealed Corten, for a controlled finish

Brushed and waxed or clear-coated options for interior installations

The result is a range of expressive finishes—from warm orange tones to deep, earthy browns—suited to the project’s location and character.

PORTAMET: Craftsmanship in Corten
At PORTAMET, we specialize in fabricating bespoke steel windows using premium European systems, including Secco Sistemi OS65 in Corten steel. Our workshop is equipped to handle even the most demanding custom designs—combining precise cutting, TIG welding, and surface treatment to deliver windows that are both rugged and refined.

We collaborate with architects, designers, and developers across Europe and North America, providing end-to-end support from concept to installation.