Bandalux interior shades equip the Thémis …  First tertiary building labeled E + C- in France

Bandalux interior shades equip the Thémis … First tertiary building labeled E + C- in France

Greek mythological figure, Themis – second wife of Zeus – sits at his side on Olympus and presides over universal order, oaths and justice. So, what more appropriate name for Icade and the architects, Corinne Vezzoni and associates, to give the name of this deity to the building that is a continuation of the new TGI – Tribunal of Grande Instance ( the Grand Court) of Paris, the Clichy Gate?

 The Thémis promises to be a remarkable project … Located on the ZAC Clichy Batignolles * (1) – Paris XVII – it is the first tertiary building E + C- Positive Energy & Carbon Reduction * (2) in France. This label prefigures the future energy and environmental regulation of new buildings low carbon (current in 2018) and the generalization of new buildings with positive energy (in 2020).

Its so-called reasoned construction – with a mixed wood-concrete structure – and its controlled exploitation, thanks to geothermal energy production, allow it to be exemplary in environmental terms. On the fight against climate change, the figures * (3) are going down: Reduced Carbon Impact in Construction 30% – Reduction of Carbon Impact in Operation 70% – Carbon Storage: about 1500 tonnes of CO2. Preservation of natural resources: Waste repurposing of 75% of construction waste – Reutilization of 203 m3 of rainwater per year for watering green spaces.



“Thémis is located on the edge of the ring road – with all that this implies in terms of various types of pollution – and our decision is to bring a real brilliance of light to the North- North-West facade. Says Corinne Vezzoni, architect of the eponymous agency.

The proximity of the TGI is also – for this R + 7 building of 10.655 m2 – a major issue. The challenge of Themis is to exist without ostentation and to assert oneself – harmoniously – without competing. To compensate for the lack of light due to the exposure and to face the dominant mass of the TGI, we thus integrated a luminous signal offering a mark from the peripheral, Continues the architect. 

Designed and built under BIM, the building is distinguished by a linear facade of 80 m benefitting from an optical dynamic created – on this North facade – thanks to a double pane glass. The Ipachrome screen-printed interior glazing, with its shimmering vertical stripes whose density varies, allows a graphic and changing reading of the façade through games of depth and transparency. This façade captures – as much as possible – the light radiation.  The Southern façade is – as for it – vegetated with a predominance of voluble plants on vertical vanes, underlines Michelle Lenne-Haziza, associate architect of Atelier MLH.


“The challenge, here, was to increase solar gain with a double pane façade. The exterior glazing is an extra-light laminate, which does not alter the light transmission. The interior glazing – screen-printed and slightly inclined by approximately 1 degree from R + 1 to R + 7 – is a double laminated A42 dB also with extra-clear glass and a Low-E coating”. Says Léa Richert, specialist in thermal optimization of façades and project manager at VS-A.

The Bandalux indoor solar protection plays – thus – fully its role particularly by ensuring the comfort imposed by the BREEAM certification: Premium Plus shades – made of Polyscreen® 550 fabric – efficiently filter light, offer, in a homogeneous way, a pleasant visibility outwards while avoiding glare in the workspaces.

“This indoor solar protection meets the environmental requirements of the labels HQE – BREEAM – LEED – E + C- and Effinergie.  These shades are calibrated according to the body frame and do not touch edge to edge. They are – voluntarily – distant by about 10 cm *(4) to allow the future users to arrange their space by partitioning it according to each frame. This, starting from the amounts of the Northern façade and up to the central part of the space”. Note Mathias Friedman from the MLH Workshop.


More than 50 different dimensions are referenced on this exceptional project and the long-standing partnership between Castel Alu and Bandalux makes sense here.  The experience and know-how of the facadier made it possible to understand – in every detail – this project requiring perfect sizing for impeccable implementation. A key:

  • 440 shades from 120 to 200 cm wide with a height ranging from 2 to 5.20 meters
  • 102 shades from 60 to 120 cm wide and from 2 to 5 meters high

Total number of Premium Plus roller shades: 542 units

Implemented – indoors – on the entire North façade and the ground floor at R + 1 on the Southern façade

Motorized wired – silent – shades managed by GTB (3 remotes are available per level)

Premium Plus shades ensure a perfect winding of the fabric – especially – over large dimensions.



Textile choice Polyscreen® 550 – color Perla Gris

  • This textile offers a degree of openness of 5%
  • Thickness: 0.78 mm – Weight: 610 g/m2

Optic-solar values according to the standards EN410 – EN14500 – EN14501:

  • Ts – Solar transmission: 11%
  • Rs – Solar Reflection: 29%
  • As – Solar absorption: 60%
  • Tv – Visible light transmission: 9%
  • Tv, n-n – Direct visible light transmission: 7%
  • Tv,n-dif – Transmission of diffuse visible light: 2%
  • Rv – Reflective light transmission: 33%
  • gtoti – Indoor Solar Factor : 0.43 with insulating double glazing type C                                                              0.26 with insulating double glazing type D

IN TERMS OF SOLAR FACTOR, these Bandalux interior shades allow – both in summer and winter – a thermal gain ranging from 20 to 27% depending on the orientation of the façade.

IN TERMS OF HEAT TRANSFER, these Bandalux interior blinds offer an improvement of the thermal insulation between 10% and 13% depending on the orientation of the façade.

THERMAL CHARACTERISTICS NORTH FRONT –  Front Lot Information VS-A: Summer – solar factor shades down: 0.25 Winter – Ucw = 1.2 W / m².K – performance of the façade including the silkscreened opaque part Light – Light transmission of glazings ≥ 0.65

COLOR PERLA GRIS… The choice of Corinne Vezzoni was to ensure an aesthetic continuity between the façades and the indoor solar protection. This textile – slightly dark – attests to a perfect balance, and a refined elegance, between interior and exterior.


  • All Bandalux shades have been delivered with integration brackets – tailor-made – for ultra-discrete ceiling installation. Other specificity: the motor cables have also been made to measure – in grey and a length of 15 meters – to be completely hidden.
  • “Each Bandalux blind has been delivered with a specific marker code to identify – immediately – its positioning during the implementation. This allowed us a huge time saving”, says Geoffrey Goussard, construction manager at Castel Alu.
  • Carbon impact – material-related – in the calculation E + C- The Bandalux interior shades – all over the Northern façade and on the Southern façade in the DRC and R + 1 façade – weigh 8 kg eq.CO2 / m²SDP on the 1000 kg eq.CO2 / m²SDP – about – the building, knowing that the life of an interior awning is 20 years”, Concludes Alexandre Duverger, Environmental Design Engineer, Sustainable Buildings Department, Artelia.

Focus on the Polyscreen® range of textiles 

Bandalux flagship reference, Polyscreen® consists of a polyester yarn – high tenacity – covered with PVC. This range of fabrics – 100% recyclable – ensures unparalleled visual, thermal and acoustic comfort. Lead-free and phthalates-free, these textiles are installed indoors and outdoors and come in many references offering degrees of openness from 0 to 16%.

Participating in improving the energy efficiency of buildings, these canvases (classified M1 – Euroclasse Bs2d0) meet the requirements of the E + C- state label and the HQE® – Effinergie® – LEED® – BREEAM® certifications – etc. . Polyscreen® fabrics are Greenguard Gold certified and warranty perfect indoor air quality. They benefit from FDES. Easy to maintain, they are warrantied 5 years.

The design / construction of a building such as it is – and especially tertiary – requires a significant investment and therefore requires to be profitable. The choice of systems and materials remains an essential asset both in terms of management and control of user costs and the durability of the structure. Choosing Bandalux products means choosing quality, technicality, durability and therefore serenity.


*(1) ZAC Clichy Batignolles … Certified New Urban District by the Île-de-France region, the ZAC is one of the eco-districts through which the City of Paris aims to implement a sustainable development policy, expressed in particular through its Climate Plan and Biodiversity Plan.

*(2) In addition to the E + C label – awarded in March 2017 – by the Ministry of Housing … Thémis is also labeled HQE Excellent, 2015 reference – BREEAM Excellent, 2013 reference – Effinergie + (RT 2012) and Biosource, 2015 reference, as well as Low Carbon Building (BBCA) since July 2016.

*(3) Source Icade Promotion

*(4) Traditionally, the extra-fine design of Premium Plus shades makes the space – between each shade – minimal (GAP) to minimize light input.

Client: Icade Promotion Tertiary

Mastery of work:

Architects: Corinne Vezzoni & Associates

Associated Architect: Michelle Lenne-Haziza – MLH Workshop

BET Structure – Environment – OPC – MO Execution: Artelia

BET Front: VS-A

BET Multidisciplinary: SFICA

BET Wood: Barthes Wood

BET Acoustics: Lamoureux Cabinet


Facade and Sun Protection: Fayat group – ACML and Castel Alu

Certification Bodies: Certivéa and BRE

Total usable area: 10.655 m2

Label E + C-: E2C2 level

Delivery of the building: second quarter 2018

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