Thermally-Broken Steel ​

Slim & Narrow-Sight-Line Profiles by Ottostumm

Tuval-Minimal’s Thermally-Broken Steel-Windows & Doors are crafted with Ottostumm’s high-quality profiles. 
Ottostumm’s unique W50 profiles family perfectly match Tuval’s approach to offer the most minimalist & clean designs.

With more than 20 years experience, we offer the highest quality Thermally-Broken system, preserving the famous elegant look of the legacy hot-rolled steel-windows.

  • Steel Windows & Doors with legacy look & fittings. Keeping the legacy look, side to advanced Thermal Performance.
  • Spray painting with variety of special finishes. Unique look, Strength & durability for years without rust and without maintenance.
  • Dual Weather striping, Advanced dual-glazing. Low U-Factor side to superb isolation.
thermally insulated glass, a frame house, igu panels, thermally insulated glass, tuval minimal,steel window sliding, white steel windows, steel window with glass, thermally broken steel
Thermally broken steel window profile with double glazing
W50 iron profile for molded iron window. Thermal window with insulating glass
Cross-section of a luxury Tuval minimal design thermal steel window frame
Cross-section of a modern, energy-efficient window with LOW-E coating, argon gas, and thermal-break frame.

W50 TB By Ottostumm

Keeping all the famous benefits of Steel-Windows & Doors, without having to compromise superb Thermal-Performance

  • Minimalist appearance & low U-Factor
    Most minimalist thermally-Broken steel profile with dual rubber seals. Similar sight-line of Legacy W40 profiles, with low U-Factor (>0.3). IGU total thinness up to 37mm.
  • A variety of options for window & door opening inward/outward, awning, or pivot. 
  • Customized design & Style
    Classic or Modern with full flexibility to define all dimensions and design, as per the opening characteristics and operational requirements.