Key facts

Sky Screw
Sky Screw
Siller Treppen
Architonic ID:
Stairs/Elevators-Glass stairs
Stairs/Elevators-Spiral staircases


We love to go new ways in staircase design and this is what you can see with our new spiral staircase „sky-screw“. The design reminds of an air-screw, circling up the sky. That’s why we chose the mentioned name for this model. This spiral staircase can be realized in glass, as all-glass staircase or with our “high-tech” concrete and in wood, of course.

Glass spiral staircase: The glass treads are consisting of several single glass panels, all in different shapes and sizes. The oval shape of the steps makes the ascendant as smooth as possible. Depending on your taste and choice we can work with different design elements to finish the stairs in many ways. The treads could be lighted with LED or we can work with etching of the surface to create patterns. Further the foot of the stair could be lighted so that the stair seems to be floating above a shining light. As for the railing you may choose curved or straight glass pieces.

Concrete spiral staircase: We can achieve the same look with our developed “high-tech” concrete mixture. Thereby the outside of the treads ends in with just a view centimeter. For the finishing of the material we can use some marble dust and change the basic look of the material. This can be an aesthetic adjustment to other colors or materials in the surrounding. For instance the treads can appear in black or red colors.

Wood spiral staircase: Similar to our model Pentagon has this stair to be made with hand and the use of machines is possible very limited only. You have a choice of all different wood types and finishes. Again by using different color lacquers or LED lights you can achieve amazing looks