MTS50 Thermally Broken Steel - Zen Doors & Windows Skip to main content
Textured golden background suggesting warmth, luxury, and elegance, enhancing the theme of bespoke architectural design.

MTS50 Thermally Broken Steel

Bright corner workspace featuring a sleek white desk, a grey chair, and large steel-framed windows with textured glass, surrounded by light brick walls.

MTS50 Solid Cold Formed Thermally Broken Steel

Textured golden background suggesting warmth, luxury, and elegance, enhancing the theme of bespoke architectural design.

The MTS50 Profile represents a new generation of steel framing that combines structural integrity with advanced thermal performance. Using precision cold-forming technology, each section is designed to maintain the timeless aesthetic of solid steel while delivering exceptional insulation and energy efficiency for modern architecture.

Built with a high-performance thermal break system, the MTS50 minimises heat transfer between interior and exterior environments, improving comfort and reducing energy costs throughout the year.

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Enduring Form. Enhanced Efficiency.

Textured golden background suggesting warmth, luxury, and elegance, enhancing the theme of bespoke architectural design.
  • Ottostumm MTS50 Solid Cold Formed Thermally Broken Swiss Steel Profile
  • Stepped Leg Design
  • High density cast in polyurethane isolator
  • Very compact profiles with minimal sight lines and depth
  • Low emissivity double glazed up to 37mm
  • Choice of different glazing beads
  • Recommended for internal or external doors or windows
  • Highest Thermal Performance Steel Profile
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Cross-section of a thermally broken steel window profile, featuring a sleek black frame and triple-glazed glass panes.

MTS50 Inside View

Thermally broken steel window cross-section showcasing sleek black frame and multi-layered glass for enhanced insulation.

MTS50 Outside View

MAXIMUM SIZES MTS50 Solid Steel
DOOR / WINDOW TYPE HEIGHT (mm) WIDTH (mm)
*Fixed Window *5500 *5500
Awning Window 2400 900
Casement Window 2450 900
Hinge Door 2450 900
Internal Cavity/Barn Sliding Door NA NA
Pivot Doors NA NA
External Lift & Slide Sliding Door 3000 1200
Bifold Door 2450 1200
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  • *Larger Fixed Windows will generally be separated into multiple sections and may need to be glazed on site depending on the overall size. Details will always be confirmed on our CAD shop drawings.
  • Multipoint locks are required for W40 doors when the door is higher than 2450mm
  • Awning Windows are recommended for windows smaller than 1.2 sqm
  • Single Glazed Door Weight: 20kg-30kg per sqm depending on design
  • Double Glazed Door Weight: 40-50kg per sqm depending on design
Detailed technical drawing of the MTS50 thermally broken steel profiles, showcasing dimensions and design specifications in black on a white background.
Technical drawing of the MTS50 thermally broken steel profile, showcasing dimensions and structural details in a monochrome layout.
Thermally broken steel door designs showcasing arched tops, multiple glass panes, and detailed measurements for custom specifications.

Each profile is a testament to advanced engineering, seamlessly combining superior insulation, structural strength, and elegant form to redefine the performance and beauty of modern steel doors and windows.

Download Full Specifications
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Arched steel window featuring six panes, a central vertical divider, and a sleek handle, finished in a dark, elegant colour.
Arched steel door design with a minimalist layout, featuring a black frame and glass panels, partially open to showcase the entryway.
6Lite Arch

Explore our range of custom steel door designs, built for strength, security, and everyday performance. Each design is manufactured in-house with precise detailing, durable finishes, and solid construction, delivering reliable protection without compromising style.

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