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The solid alternative to aluminium


If you're looking for stability and "raw strength" for fire-resistant glass and exceptionally large windows, then FERROTECH is the answer.


FERROTECH is suitable for use with corner keys and bending in all known bending machines. It fulfils all the requirements for the production of fire-resistant glass.


The traditionally framed spacer delivers optimal durability through 6.5 mm of galvanised steel and an exceptional stability when compared to aluminium spacers – particularly in the production of larger units.


The thermal conductivity of steel is also less than that for aluminium, and this gives a "warmer edge" to the thermal glazing. The thermal expansion coefficient of glass and steel are very similar, and in contrast to aluminium, this makes for a more uniform structure, when hot and cold temperatures activate the thermal glazing.


We are happy to paint the visible surface, flanges and the uppermost 2 mm of the butyl side in whichever RAL and NCS colours you desire.


The unbending facts

  • 6.5 mm galvanised steel
  • The optimal solution for fire-resistant glass and large windows
  • We also stock corner keys, model corner keys and connectors
  • Can be delivered pre-assembled with open connectors 


Welcome to ROLLTECH: 

the world's leading producer of 

spacers for the glass industry, 

and your supplier of advice, 

information and the right solution

to match precisely your needs.


When PSI value is the most important task.


ROLLTECH A/S is a member of Building Supply. For further information, visit the website: www.buildingsupply.dk




Calculate the U-value of your project quickly and simply. The calculator covers standard frames in all sizes with ROLLTECH spacers and uses BF and EN 10077 standards. You can use the following link to calculate PSI-values:


Johs. E. Rasmussens Vej 12
DK-9800 Hjørring
Tel.: +45 96 23 33 43
Telefax: +45 96 23 33 11
E-mail: info@rolltech.dk

78 32 25 19

SE-number (export): DK 23 16 38 53
SE-number (import): DK 78 32 25 19