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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 advantages

Durable, lightweight, formable & sustainable

  • Unlimited geometry and surfaces
  • Thin
  • High strength
  • Lightweight
  • 100+ durability 
  • Durable in all weather conditions
  • Easy installation 
  • No technical maintenance
  • Sustainable and environmentally friendly
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Mounting principles

Our typical facade cladding is produced with one of the following mounting systems or a combination of same.

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

Most of our facade solutions utilise the material’s possibilities for mounting without visible screws and with fewest possible loose parts. This achieves a finished result that appears to be monolithic and which technically requires a minimum of maintenance.

Facade elements are usually mounted as building envelopes with a ventilated back side. The assembly method itself varies according to the element size and the nature of the underlying supporting structure. On smaller elements, fittings are cast on the back and the element is mounted as a “radiator” – On larger elements, a load-bearing steel frame is embedded which then delivers the forces where it is possible.

Vertical joints are often performed with traditional element solutions: expanding joint strips etc. – or overlap. Horisontal joints are typically vented so that lower elements go under the overhanging element.

All our technical solutions are tried and tested.

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