The new VISS-HI façade system achieves unprecedented thermal insulation values in lightweight steel construction thanks to the new synthetic foam insulating cores. This means that steel façades are also able to achieve passive house standards.

The system also offers excellent opportunities for renovation and subsequent energy optimisation work. The insulation is easy and economical to install which means existing VISS façades achieve low-energy standards.


Fabrication benefits

  • Uf values lower than 0.8 W/m²K (passive house standard)
  • Infill thicknesses of up to 70 mm for multiple-pane insulating glass can be used
  • Insulating core for mullion and transom profiles
  • Retrofitting to existing VISS façades to low-energy standards
  • Can be used in VISS standard systems, as well as VISS Ixtra and VISS Davex
  • Can be easily fitted in the space between panes for efficient fabrication
  • Can be used for double-pane and multiple-pane insulating glass

Technical information

Uf value of frame (≥)0.65 W/(m²·K)
Min. face width50 mm
Max. glass/panel thickness70 mm
Max. weight1800 kg
Surface finishesRAL, Powder, Paint
Air permeabilityAE
Max. sound reduction Rwp47 dB(A)
WatertightnessRE 1200
Impact resistanceClass 5
Burglar resistanceUp to RC4
Suitable for safety barrier loadingYes
Bullet resistanceUp to FB6
Min. basic depth of mullion50 mm
Max. basic depth of mullion280 mm
Min.-max. basic depth of mullion50…280 mm
Max. face width60 mm
Min.-max. face width50…60 mm
Min. glass/panel thickness38 mm
Min.-max. glass/panel thickness38…70 mm
Max. glass/infill weight1800 kg
Installation angle0-15°
Polygon façade angle15°
Drainage levels2
Wind load resistance2.0 [kN/m²]
Sun shading attachmentYes
Security systemYes
CertificatesPassive house certificate, EPD
CE markingYes
Minergie classMinergie
Passive house compliantYes
Passive house classphA
StandardsEN ISO 10077, DIN EN 13830
CWCT certifiedYes
Building authority approvalYes

Specification texts

Highly thermally insulated mullion and transom construction for single and multi-storey facades, optionally available in polygonal design with different angles

Insulating cores made of plastic foam are used in the glazing rebate to reduce thermal radiation. These insulating cores must allow ventilation of the edge seal.

Depending on the thickness of the filling, Uf values of 0.7 to 1.2 W/m²K, including the influence of the screw fixing, are achieved with these insulating cores.

Design features:
The supporting structure of the facade construction consists of rectangular or specially shaped
Hollow steel profiles with a face width of 50/60 mm and different construction depths. The
supporting profiles are arranged on the room side. The transoms are connected to the posts by
Welding or special T-connectors.
External cover profiles in aluminium/stainless steel, face width 50/60 mm, with different depths
and contours.
Glass / infill thicknesses up to 70 mm can be used. All glass panes – even those from
Insert elements – are arranged in the same plane.
The sealing to the glass panes and/or infill is done with EPDM seals. The
inner seals form the water-bearing level of the system. Compensation of different
Filling element thickness is achieved by variable system seals. The upper glass edge seal is achieved by
a cloth vulcanized to the horizontal seal is covered. Due to the overlapping of the
horizontal seal and the vertical seal, controlled drainage of the glazing rebate
achieved. The basic rebate ventilation as well as the vapour pressure equalisation of the glazing rebate to the outside is
invisibly field by field by means of corresponding expansion pieces in the bolt area below the
outer cover profile.
The pressure bars are fixed by means of stainless steel screws, centering discs and insulation clamping knobs.
connected to the supporting structure. The insulation clamping knobs are clamped in the supporting structure.
For the design as a high insulation façade, the space between the panes in the mullion and
Bolt a system-bound, innovatively developed insulation core according to manufacturer’s specifications
to use.
There must be no direct connections or thermal bridges through the screw connection between
Supporting structure and external pressure bars are created. All screws for outdoor use
shall be made of stainless steel.

Profile face widths:
mullion, transom 50/60 mm

Profile construction depth View width 50 mm:
(the formal dimensions mentioned here are minimum requirements)
Post 80 mm
Bolt 80 mm
Bolt base point and
ceiling connection 80 mm
Cover shell (post)
(for variants see architect’s folder) 18 mm
Cover shell (latch)
(for variants see architect’s folder) 12 mm

Profile construction depth View width 60 mm:
(the formal dimensions mentioned here are minimum requirements)
Post 80 mm
Bolt 80 mm
Bolt base point and
ceiling connection 80 mm
Cover shell (post)
(for variants see architect’s folder) 18 mm
Cover shell (latch)
(for variants see architect’s folder) 12 mm

Translated with (free version)


Test documents

Document type Test type Result Classification Document no. / Download
Prüfbericht Einbruchhemmung
RC3 View onlineDownload (pdf, 521.9 KB)
Gutachterliche Stellungnahme Einbruchhemmung RC3 View onlineDownload (pdf, 947.7 KB)
Gutachterliche Stellungnahme Luftdurchlässigkeit
Widerstand gegen Windlast
Klasse AE
Klasse RE 1200
2000 Pa/ 3000 Pa
I5 / E5
Klasse AE
Klasse RE 1200
2000 Pa/ 3000 Pa
I5 / E5
View onlineDownload (pdf, 323.9 KB)
Gutachterliche Stellungnahme Schlagregendichtheit AE, RE 1200, 2000 Pa, I5/E5 CE Leistungswerte RC3 View onlineDownload (pdf, 323.9 KB)
Gutachterliche Stellungnahme Einbruchhemmung
EN 1627 View onlineDownload (pdf, 596.3 KB)


Systems full of individual possibilities

View onlineDownload