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The Colossus of Prora

Prora, a place steeped in history: Formerly planned by the Nazi regime as a KdF seaside resort on Rügen but never completed, the former 4.5 km long building block served as an NVA barracks for decades during GDR times. After the fall of the Berlin Wall, the imposing complex gradually fell into disrepair and was probably the most famous ruin in Germany for decades.

In the 90s, there was slow progress with the site, and the Museum Mile was established. In 2011, after the Prora Documentation Centre, the youth hostel finally moved in. From 2012 onwards, some apartment blocks were sold to investors. To this day, some blocks have fallen into disrepair.
Koloss von Prora Rügen

The Colossus of Prora stretches 2.5 km along the Bay of Binz. Blocks 1-4 have been renovated as listed buildings for use as holiday apartments, condominiums, and a hotel. The renovation of Block 5 is still ongoing.

Heritage-protected renovation for holiday apartments

After the purchase by an investor, Prora Solitaire Hotel GmbH began planning a hotel and holiday apartments in 2013. The requirements for the protection of historical monuments were based on the original condition of 1936. The former sunbathing halls were therefore to be given generous panoramic glazing to preserve the once open view of nature. Construction work began in 2014. In 2020, the Avida Lofts holiday apartments were opened in the former sunbathing halls of Prora. Manfred Hartwig, Managing Director of Prora Solitaire Hotel GmbH, and Toralf Krummheuer, commissioned metalworker, decided to use cero III elements for the generous glazing of the two halls.

Safety even with high wind load

However, it was not only the narrow profile widths that were decisive for the use of cero III systems. Due to the exposed location directly on the Baltic Sea with high wind loads, Toralf Krummheuer also paid particular attention to the windproofness of the window solution and found that all the conditions were met in the cero modules.

Schiebefenster-cero-prora

All architectural interventions were made in favor of the open view: a part of the intermediate ceiling was removed and galleries were added to give the open architecture the greatest possible impact. The cero III systems were used on all floors. The balconies of the upper floors were given transparent railings.

Prora Liegehallen Fassade

As part of the conversion and renovation, the former reclining halls in Prora were converted into holiday apartments and extensively glazed.

Prora - The Ruin
Technology at a glance
hoher Glasanteil
hoher Glasanteil
Maximum transparency
hoher Glasanteil
Maximum transparency

The slender frames and profiles help to make the elements as transparent as possible. The sight lines are kept to just 34 mm, resulting in a symmetrical and minimalist design that is underlined by the 98% glass composition. Depending on which variant you choose, your cero will come with either triple or double-toughened single-pane safety glass (TSG). 
 

Einbruchhemmung
Einbruchhemmung
Security
Einbruchhemmung
Security

cero has been tested and certified in line with the highest security standards, and equipment that meets anti-burglary protection classes RC2 and RC3 is available as an option. A two-point latch bolt with adjustable locking points and a stroke of 24 mm is fitted as standard in the top running track and guide rail. Connections to alarm systems, a closing monitor, and notification systems such as broken glass sensors and position monitoring systems are all available as options.

15qm
15qm
Large element sizes
15qm
Large element sizes

The maximum cero sliding window with a glass area of 15 m² and a weight of up to 1000 kg per element can still be operated without any problems. Stainless steel carriages and rails guarantee easy and low-wear gliding, and the integrated stainless steel rollers ensure an even load distribution. If required, an electric drive for the panels is also possible. cero successfully passed an endurance test of 100,000 opening and closing cycles.

Vielfältige Grundrisse
Vielfältige Grundrisse
Versatile ground plans
Vielfältige Grundrisse
Versatile ground plans

The range of combination options for cero system components as sliding, fixed and corner elements is almost limitless. They offer an astounding degree of creative freedom in terms of design, and are suitable for any ground plan. 

Motorisierung
Motorisierung
Motorisation
Motorisierung
Motorisation

The sliding elements can be fitted with a fully automated operating system including electro-mechanical locking and unlocking, which offers the user interdependent control of several panels via a control unit.

cero III
cero III

cero sliding window

Aesthetics, functionality, and quality are the parameters that define the cero sliding window. Narrow frames and profiles support the transparency of the elements. The sash frame, which is only 34 mm slim, and the equally slender profiles consistently emphasize the minimalist design without neglecting aspects such as safety, comfort, and performance. The system components offer the design freedom that demanding projects and builders require. With sash sizes of up to 6 m in height or 4 m in width and a maximum sash weight of up to 1,000 kg, rooms are given new, free dimensions.

cero - sliding window
Order now: The cero brochure
Would you like to find out more about individual systems and technical details of our cero sliding window? Then you are welcome to order our comprehensive product brochure