Mosaic
Last modified by the author on 25/09/2018 - 12:00
Renovation
- Building Type : Office building < 28m
- Construction Year : 1996
- Delivery year : 2016
- Address 1 - street : 21 Rue François Jacob 92500 RUEIL MALMAISON, France
- Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.
- Net Floor Area : 18 002 m2
- Construction/refurbishment cost : 24 000 000 €
- Number of Work station : 1 200 Work station
- Cost/m2 : 1333.19 €/m2
Certifications :
-
Primary energy need
104 kWhep/m2.an
(Calculation method : RT existant )
SCI Rueil Newton c / o DTZ Investors presents its MOZAIK office building which has undergone a major restructuring between 2014 and 2016. This building of more than 18 000 m², located in Rueil Malmaison, consists of 8 office floors in adaptable superstructure and adaptable to the needs of the occupants.
The well-being and comfort of the occupants has been at the heart of the concerns both during the design and implementation of the project. Thus, many studies were carried out upstream of the project to choose the equipment and the materials allowing to combine comfort and health in the workspaces as in the spaces of relaxation.
In addition, this building benefits from a triple environmental certification, HQE, BREEAM and LEED as well as a BBC EFFINERGIE label. Obtaining these certifications ensures, in addition to the comfort of the occupants, a reduction in the environmental impact of the project.
MOZAIK was also chosen to participate in the HQE Performance test evaluating the environmental performance of buildings and its impact in terms of carbon over the entire life cycle of the building.
SCI Rueil Newton c / o DTZ Investors has chosen to carry out an exceptional operation reducing the building's environmental impact and combining comfort and health of the occupants.
Sustainable development approach of the project owner
SCI Rueil Newton c / o DTZ Investors wanted to engage in a triple certification HQE Rénovation, BREEAM and LEED for:
- Greening the real estate portfolio of the institutional investor
- Developing DTZInvestors' commitment to environmental concerns
- Apply the DTZ Investors CSR Policy
This approach represents for DTZ Investors an additional experience in certifications, a better visibility on the market and fits perfectly into its environmental strategy applied to its assets in management. Indeed, the entry into certification is in line with the real estate certification policy that DTZ Investors has under management: nearly 60% of the managed real estate assets are currently certified.
SCI Rueil Newton has decided to carry out an exceptional operation, including triple certification, including the BBCEffinergie label, to promote and distinguish the Mozaïk building.
Architectural description
LOBBY
In order to increase the volume of the hall and to offer the users and their visitors a more generous reception area, a light glass volume projecting from the façade of the upper floors has been created from ground level to level R + 1.
At garden level, a secondary lobby has been created at the western end of the plot.
TREATMENT OF FACADES
In order to minimize the environmental impact of the project, the majority of the façade has been retained. Constituting points of thermal weakness and corresponding to a dated architectural vocabulary, all of the glass block elements located on the facades of the stairwells have been replaced by solid insulating complexes integrating into the existing façade pattern. This allowed to significantly improve the thermal insulation of the building. These elements are clad in glazed exterior claddings in opaque white glass which is embedded in the façade unit and allows the natural lighting of these areas to be preserved.
To control the solar gains, on the three protruding volumes of the rue François Jacob, a second skin, detached from the facade acting as a solar filter was implemented. It consists of a tubular structure in white steel, which supports a stainless steel mesh (placed on the inside of the structure), to protect the glass facade from direct radiation.
THE REQUALIFICATION OF ATTIC AND ROOFING VOLVUI
The Attic level (level R + 8) is completely requalified and made available to the occupants. The terrace, initially used as a raceway for cleaning nacelles, is transformed into outdoor lounges accessible to users. To complete the approval of this terrace, a pergola to protect users from rain and sunshine is implemented. It consists of a horizontal structure in clear lacquered steel tubes forming a square and partly filled with clear lacquered steel plates. We thus find, on the horizontal plane, the effect of shimmer and disintegration produced by the second skin on the façades. Architecturally, this over-roof also allows to give a real crowning to the building. In addition to its functional role and its architectural role, it has a technical role with its surface equipped with solar panels participating in the production of domestic hot water.
Contractor
Construction Manager
Stakeholders
Designer
Sahuc & Katchoura
Pierre DAYDIE
http://www.sahuc-katchoura.com/Assistance to the Contracting Authority
MANEXI
Iris PERRUCHAUD
http://www.manexi.comAMO Environment
Thermal consultancy agency
SNC LAVALLIN
http://www.snclavalin.com/fr/BET Fluids
Contracting method
Separate batches
Type of market
Global performance contract
Energy consumption
- 104,00 kWhep/m2.an
- 182,00 kWhep/m2.an
- 231,00 kWhep/m2.an
Real final energy consumption
25,00 kWhef/m2.an
Envelope performance
- 1,39 W.m-2.K-1
- 0,74
More information
An energy performance contract has been put in place during the appointment of the site maintainer
Systems
- Gas boiler
- Radiant ceiling
- Individual electric boiler
- Solar Thermal
- Water chiller
- Chilled Beam
- Double flow heat exchanger
- Solar Thermal
- 3,00 %
Urban environment
- 3 589,00 m2
- 75,00 %
- 369,00
- 450 secure bike pitches
- 40 secure two-wheeled motorized spaces
- 325 parking spaces including 14 equipped with charging stations
- 1 taxi station
Product
Solar DHW production
VAILLANT
https://www.vaillant.fr/accueil/service-support/vous-avez-une-question/
https://www.vaillant.fr/accueil/HVAC, électricité / heating, hot water
Construction and exploitation costs
- 50 000,00 €
- 24 000 000 €
Water management
- 3 624,00 m3
Indoor Air quality
Comfort
GHG emissions
- 50,00 année(s)
- 889,00 KgCO2 /m2
Life Cycle Analysis
- 1 790,00 kWhEP
Reasons for participating in the competition(s)
MOZAÏK est un bâtiment qui allie santé et confort des occupants, conformément à la politique environnementale de la SCI Rueil Newton c/o DTZ Investors. En effet, l'ensemble des équipements a été étudié afin de répondre aux besoins des occupants :
- Régulation de la température ambiante et de la ventilation par les occupants (1 télécommande pour 4 personnes maximum)
- Eclairage via sonde de présence, d'ensoleillement et possibilité de prise en main par télécommande
- Stores gérés par une sonde météo et par les occupants.
- Sonde CO2 dans les salles de réunion asservies à la ventilation
- Bâtiment entièrement divisible en 24 lots (3 lots par étage) et systèmes adaptables au re-cloisonnement
- Transports en commun à proximité, bornes de recharge pour véhicules électriques, places covoiturage et local vélo
- RIE, cafétéria et service de conciergerie dans le bâtiment.
- Revêtements intérieurs de classe A+ aux émissions dans l'air intérieur
- Interdiction de fumer sur l'ensemble de la parcelle afin d'éviter les nuisances aux autres occupants
Par ailleurs, de nombreuses études et mesures à réception ont été réalisées afin de garantir le confort et la qualité sanitaire du bâtiment (mesures acoustiques, mesures de qualité d'air intérieur, mesures d'éclairement artificiel, étude d'éclairage naturel, débits d'air, qualité de l'eau) Enfin, un processus de commissionnement a été mis en place afin de garantir le bon fonctionnement des équipements à réception et ainsi la satisfaction des occupants.
Le projet de restructuration a privilégié la conservation d'un maximum d'éléments encore utilisables sur le site afin de réduire son impact en terme d'émissions carbone. En effet, la façade en pierre, la structure béton du bâtiment ainsi que les menuiseries en aluminium ont été conservées. La chaudière gaz et les groupes froids qui n'étaient pas en fin de vie ont été conservés et remis en route ainsi que quelques CTA. Tous les matériaux en bois du projet sont labellisés PEFC ou FSC. L'eau chaude sanitaire du RIE est produite par des panneaux photovoltaïques situés en toiture. Aucun nouveau parking n'a été créé. Les déchets de chantier ont été valorisés à 90% (dont 80% de valorisation matière). MOZAIK a participé au test HQE Performance évaluant la performance environnementale des bâtiments et son impact en terme de carbone sur l'ensemble du cycle de vie du bâtiment, et ce par contributeur et composant.