B73 Story by STARH B73
B73 Story by STARH B73
Product Spec Sheet

ElementBrandProduct Name
Curtain walls and DoorsReynaers Aluminium
Facade cladding: Glacier White, DuPontCORIAN® Design
Corian® Solid Surface Deep Titanium
Interior lightingBocci
44.14
Exterior pavingSemmelrock stein + design
Pastella
GlazingGuardian Glass
Interior furniture: Sofa systemPoliform S.p.A.
Saint-Germain

Product Spec Sheet
Facade cladding: Glacier White, DuPont
Corian® Solid Surface Deep Titanium by CORIAN® Design
Interior lighting
44.14 by Bocci
Exterior paving
Glazing
Interior furniture: Sofa system

B73

STARH as Architects

B73 is located in one of the central areas in Sofia, Bulgaria. It stands out in the dense urban context with its innovative and impactful look. The building itself achieves a balance between design and functionality that work simultaneously, while having high-end material usage and exceptional quality in execution.

photo_credit Dian Stanchev
Dian Stanchev
photo_credit Dian Stanchev
Dian Stanchev
photo_credit Dian Stanchev
Dian Stanchev

B73 is located at a corner lot facing a boulevard and an inner courtyard looking towards Vitosha Mountain. There are six levels above ground and one underground level which is a carpark, served by a high-speed car lift. Each residential floor above comprises of just a single 280 sqm apartment. Optimal spaces and light inflow are base points in the apartments’ layout design. For example, the top floor apartment has a living room with height of 6,4 meters. All the rest have maximized height in order to achieve spacious areas. A light art installation 44.14 by Bocci is installed inside the double-height lobby. It is specially created for this particular space and building, as well as being the only one in Eastern Europe. The ground floor areas are purposed for furniture design show room.

photo_credit Dian Stanchev
Dian Stanchev
photo_credit Dian Stanchev
Dian Stanchev

B73 is one of the few buildings in Bulgaria, that uses solid surface material and thermoforming technology for achieving complex three-dimensional shapes for such scale. The construction process of the building fabric, as well as its longevity, have a low carbon footprint. The concept of the façade starts from something quite simple as a white surface. Then it has several strategically placed cuts and is smoothly stretched along the Z-axis. There is a moment of contact between the main floor slab and the stair’s landing where a discontinuation occurs that creates in a natural way the shape of a swallow bird. The final result is a complex form that is being transformed into the most distinctive element of the building.

photo_credit Dian Stanchev
Dian Stanchev
photo_credit Dian Stanchev
Dian Stanchev
photo_credit Dian Stanchev
Dian Stanchev
photo_credit Dian Stanchev
Dian Stanchev
Caption
Caption
Caption
Caption

Material Used :
1. Facade cladding: Acrylic stone panels, Corian - Glacier White, Deep Titanium, DuPont
2. Façade system: Reynaers Aluminium CW60 Project Solution
3. Glazing: Guardian Glass - SunGuard SN
4. Interior lighting: Bocci 44.14
5. Interior furniture: Poliform, Saint Germain sofa system
6. Exterior paving: Semmelrock, PASTELLA

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B73

Reynaers Aluminium as Curtain walls and Doors

Since 2020, you can find an unfamiliar sight in Sofia, Bulgaria. Meet B73, an extraordinary residential building that features six floors of curiously bending aluminium profiles. This award-winning creation by Svetoslav Stanislavov stands out in the urban city centre thanks to its surprising look. The building’s curved façade profiles are project-specific solutions based on the Reynaers Aluminium ConceptWall 60 system.
 

When you pass through the neighbourhood, you will notice how the boutique building interacts with the surrounding cozy restaurants, cafés, and shops. A home with a view, both from the inside and out. It forms a stunning yet light landmark within the city, creative excellence in its purest form. Thanks to its surprising and innovative design, B73 received multiple local and international design awards, such as the prestigious Architecture MasterPrize.
 

High-end materials meet a quality curtain wall system in B73’s design. You can tell the designers chose the black-and-white façade cladding and the large wavy window frames to create a dynamic effect. “It is the most complex façade we have ever made,” says Svetoslav Stanislavov, chief architect for STARH. “The combination of a solid surface material with complex 3D shapes is very rare in Bulgaria. That is why we teamed up with Reynaers Aluminium to complete this high-standard building project.”
 

"It is the most complex façade we have ever made."
- Svetoslav Stanislavov, Chief Architect for STARH

 

Indeed, to create the remarkable wavy pattern of this building’s façade, our Development Team really had to explore new territory. With the help of the professionals at BestBend, they managed to bend ConceptWall 60 profiles, our highly insulating curtain wall system, like never before. Incredibly smooth waves give the B73 building its unique character and make it shine among its neighbours.

 

Light and luxury with bespoke solutions
With the ground floor dedicated to commercial use, the other five storeys host luxurious residential apartments, with a double-storey living room at the top floor level. Each floor consists of only one apartment, which catches the light from both sides on the street corner. If you want to fill large volumes with lots of light, glass is the way to go. And if you need vast glass panes cased in bent aluminium façades, you call Reynaers Aluminium.
 

Our Project Team designed bespoke versions of the ConceptWall 60 to make this unique façade stand out even more. Ideal to carry glass panels up to 450 kilograms, these reinforced profiles can support even the toughest pressure points in sloped or curved façade constructions. For example, even the 6.4-metre tall top-floor walls are no problem for this robust system designed to last for a very long time.
 

"Our Project Team designed bespoke versions of the ConceptWall 60 to make this unique façade stand out even more."

 

So, experience Sofia’s bustling nature right from the comfort of your home in the B73 apartment building. Our bespoke curtain wall solutions bring in the sunlight all day long, from every angle and every curve in the room. Just another reminder that Reynaers Aluminium systems are the perfect fit for your creative projects.
 

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