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Your questions, our answers.
How does a glass renovation work? Can glass scratches be removed without leaving any residue? We answer the most important questions about the restoration of damage to glass surfaces. Please select which topic we can help you with!


Who we are?

The Vitrum Group repairs damage to all glass surfaces. We provide high-quality services on behalf of architects, insurance companies, general contractors, building owners, banks, property management companies, insurance companies, museums, private households and many more. By applying our unique and proven procedures, enormous savings can be achieved with the repair of damaged objects. To ensure customer proximity and fast response times, we operate nationwide. 
We carry out projects of all sizes - from individual damage to complex tasks.


What kind of damage can be removed?

The procedure can be used to repair various types of injuries: 


  • scratches

  • Burns (caused by vandalism or washouts) 

  • Mechanical injuries

  • Glass cloudiness (caused by ageing and environmental influences) 

The process reaches its limits in the case of severe flex damage and scalloping at the edge of the pane.


Where can the procedure be applied? 

In principle, the procedure can be used on all glass surfaces.
glass surfaces. For example, on windows, shop windows, glass facades, glass doors, glass installations, glazing, conservatories and much more.  
The area of application is therefore diverse and wide-ranging.


How does the repair / refurbishment work?

When processing glass surfaces, a distinction is made between additive and subtractive processes.

In the additive process, damage to the glass surface is filled with resin, cured and then polished. 

In the subtractive process, on the other hand, minimal removal of the material (glass) takes place. The glass surface is minimally removed over a wide area until an undamaged glass surface is achieved.

The predetermined breaking point (scratch) in the glass caused by damage is thus removed and the homogeneous stress curve, as in the origin of the pane, is restored. 

Finally, the complete and unclouded transparency of the glass surface is achieved by further grinding and polishing.  


Grinding and glass - are they compatible?

In the process of glass production, mechanical processing in the form of grinding and polishing is chosen as the last step in order to obtain an unclouded view of the pane. Grinding and polishing are thus daily practice in the production of glass.

Our method fits in with this process and is therefore ideally suited for the material glass.


To what extent is material removed?

The removal of material does not significantly change the glass surface. The processing is carried out within the permissible manufacturer tolerances. The permissible tolerances of the nominal thicknesses are regulated for glass in standards and processing guidelines.

For example, DIN EN 572 Part 2 float glass.


There, even for 8 mm float glass, a nominal thickness deviation of 
+/- 0.3 mm is permitted for 8 mm float glass.

The usual depth of glass scratches is between 0.02 and 0.05 mm. Grinding out the scratch therefore does not negatively affect the glass surface.


Are there any optical impairments? 

Our methods exclude optical impairments in the sense of distortions or minimise them as much as possible. Our method creates the transition from the surface to be processed to the untreated area in such a way that distortions in the transition are prevented. As a rule, the processing of the glass is not visible or disturbing to the normal observer and thus complies with the guidelines for assessing the visual quality of glass for the building industry. 


What are the advantages of the Vitrum Group service?
  • Significant reduction in costs compared to replacing the glass pane

  • No interruption of operation required due to time-consuming installation work  

  • Repair - directly on site (no installation and removal of the glass pane required)

  • Fast reaction time (as measuring of the affected pane, orders, waiting and delivery times are not necessary)

  • No impairments 

  • Environmentally friendly and resource-saving.


What costs will I have to pay?

Since damage to glass surfaces varies greatly in size and intensity and the type of glass, accessibility of the damage and other factors also play a role, it is not possible to give general information on prices and this would be unreliable. As a matter of principle, we only give exact prices after assessing the damage on site. 

In the case of minor damage, however, our staff will endeavour to give you a rough price range based on your statements and, if necessary, photographic documentation of the damage. 
Since we always consider a possible replacement of the glass as an alternative, you can be sure that a restoration offered by us will be profitable.

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