Ottostumm W50-TB - Steel profile

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W50-TB Steel modern steel windows

With the new thermal barrier system W50 TB, OTTOSTUMM carries on the window heritage in its most authentic form, proposing the same forms, proportions and overlapping effects of the original 20th Century hot rolled modern steel window profiles, refined by cold rolling technology.

The innovative high-density polyurethane isolator used as thermal barrier, together with the possibility of housing low emissivity glass up to 37 mm, allow to fully respond to current regulations and contemporary needs for comfort, also in harsher weather conditions, where windows made from solid steel profiles may not be sufficient. The range is completed by a wide range of exclusive fittings in several finishes, reproduced from original designs of the modern era. Any kind of inward or outward openings are possible.


  1. Precision cold formed steel profiles of 1,5 mm thickness
  2. Profiles have identical sightlines and proportions of FerroFinestra W40
  3. Classic “stepped leg” design
  4. Mechanically fixed rebate gaskets
  5. Accommodates double and triple glazing up to 37 mm
  6. High density cast in polyurethane isolator
  7. Choice of different glazing beads
  8. Compatible with 16 mm friction hinges
  9. Fixed glazing, single-sash and double-sash, side-hung and bottom-hung windows opening inwards and outwards, top-hung, vertical and horizontal pivoting windows, window and doors opening inwards and outwards


Example of applications:

Profile Range

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