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GRC sills

Coherent architectural impression

Coherent architectural impression


Sills from BB fiberbeton can give the building’s facade a coherent architectural impression with the transition between window and facade. Our GRC sills are produced with many different cross-sections according to the project. Your choice of cross-section depends on the project, number of units, variants, and desired detailed.

Sills can help emphasise the craftmanship of the building’s facade and if you wish to highlight the windows this can be achieved by installing sills with decorative elements.

GRC sills are a technically and economically a good solution with a durability of more than 100 years and a resistance to all weather conditions. Furthermore, GRC does not rot, dent, nor burn and it requires no technical maintenance. We have no standard solutions for sills and all projects are solved individually.

Product highlights

Material Properties

Durable, lightweight & formable...

... That's how we briefly describe the general properties of our fiber concrete.


The advantages of GRC can be summarized as follows: 

  • Unlimited geometry and surfaces  
  • High strength  
  • Thin  
  • Lightweight  
  • Incredibly high design freedom  
  • 100+ years of durability  
  • Resistant to all weather conditions  
  • Easy installation 
  • No technical maintenance  
  • Possibility of recycling elements in future renovations 
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Mounting principles

Our typical facade cladding is produced using one of the following installation systems:

  • Stud-frame (embedded steel frame)
  • Embedded steel brackets
  • FA1000®
  • Embedded inserts
  • Recessed holes with plugs

In each project, several different installation solutions can be combined so that all elements have an easy and possibly concealed installation. 

The majority of our facade solutions leverage the material's possibilities for installation without visible screws and with the fewest possible additions and other loose parts. This results in a finished product that appears solid and does not require technical maintenance. 

Facade elements are most often installed as building envelopes with ventilated backsides. The installation method itself varies depending on the element's size and the nature of the underlying load-bearing structure. 

On smaller elements, brackets are embedded on the back, and the element is mounted similarly to the installation method for a radiator. 

On larger elements, there is often a need for greater spacing between fastening points for structural reasons. For this, we offer both a solution with a stud-frame or a ribbed solution. In both cases, the solutions are used to transfer forces to the substructure where desired or where possible. 

We often supply the receiving brackets for a complete solution. 

Vertical joints are often executed using traditional solutions: expanding joint tape, etc., or overlaps are created. Horizontal joints are typically ventilated, allowing lower elements to extend under the overhanging element. 

All our technical solutions are thoroughly tested and statically grounded. 

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Reference projects

Need inspiration? 

We have compiled a small selection of our projects as reference projects. 

You can download them here - for example, as inspiration for your next project. 


Want to see more projects? 

You can find a larger selection of our projects here. 

Take advantage of the opportunity to search exclusively among balcony projects, facade solutions, or projects in England, for example. 

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Get inspired by our projects

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