CoRI - Paint it Green

Last modified by the author on 10/10/2016 - 10:24
  • Building Type : Office building < 28m
  • Construction Year : 2015
  • Delivery year : 2015
  • Address 1 - street : 1342 LIMELETTE, Belgique
  • Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.

  • Net Floor Area : 1 444 m2
  • Construction/refurbishment cost : 1 800 000 €
  • Number of Work station : 30 Work station
  • Cost/m2 : 1246.54 €/m2
  • Primary energy need
    35 kWhep/
    (Calculation method : )
Energy consumption
Economical buildingBuilding
< 50A
51 à 90B
91 à 150C
151 à 230D
231 à 330E
331 à 450F
> 450G
Energy-intensive building

Building users opinion

CoRI: "In general, workers are very happy with the comfort of their offices and other work spaces The lighting is good and does not tire the end of the day Soundproofing is generally good.. whether in an office or between offices. regarding the quality of indoor air, we selected paintings without much of VOC emissions. There was never any comment on that. the thermal comfort will be tested next winter since the last settings were selected after severe cold and for the moment we can not say that we suffer from heat waves. to see the use ... "

If you had to do it again?

CoRI: "As regards us, we really have no negative point if we would change it again on the type of materials in relation to their implementation but especially compared to companies that have been selected for this project. It is true that the implementation of the siding on existing building was tedious. this could have been avoided if the company had had a better experience on the implementation of the selected panels .... It seems that risk can never be avoided because they are the architects who select the materials and then these are the companies that implement them and they sometimes commit without really knowing the risks / challenges related to particular materials ... .. Finally even if it is true that the beginning was a bit difficult to find a temperature equilibrium in the different spaces (rooms, corridors and laboratories), ultimately it is a matter of adaptation, we must change the way General to address this type of system. Once accepted this finding, we went on a completely different setting .... In the end it works. "

See more details about this project

Data reliability



    Certification company


    Thomas Leclercq

    Monitoring compliance with requirements for the label "exemplary building in Wallonia"


    Pierre Beguin

    safety health coordinator

Contracting method

Separate batches

Owner approach of sustainability

CoRI:"The first goal was the lack square Indeed, the number of employees rose sharply from 2010 to 2014 and the building became too small The second objective concerned the modernization of our image through our corporate identity and more widely.. our communication. with a dilapidated building, we had trouble convincing potential customers that we are a modern research center, dynamics and advanced technology. as part of this building, from the beginning we wanted to integrate reflection of the environment. in fact, this line is one of our three privileged areas and it was essential for us that the building reflects our commitment to society in terms of environment. it was our first experience in this type of investment and this is why the helium3 office was selected because it was able to integrate this dimension in the project. "

Architectural description

Our will, realizing this project was to design a building in the image of its occupant, the company CoRI (Coating Research Institute). To do this, we have introduced two concepts to carry the project. 1 / The color chart CoRI is an active research center in the field of paints. When thinking "paints" is believed "colors" or rather "range of colors." The concept of the color chart we therefore appeared as an image to the strong symbolic and identity pronounced character to the building, two qualities in our redevelopment optical readability CoRI its site. The graphic image of the facades wants an interpretation of the activity in the presence in the building. The extension takes the form of an elegant wooden cladding façade ribbon around which the composition is drawn. It is characterized by alternating large windows and Rockpanel tone white, all punctuated by signs with the colors of the company. The tape is fastened to the existing building, defines the outline of the new volume, and gives the building a new entrance at the junction between the old and the new. The existing building is insulated and encased with Rockpanel white. The colored buttons here are made by large sunshades to control solar gain. 2 / high-tech opposition / sustainable Durability, functionality and performance are three criteria that focuses its activity in the CoRI. In this idea, the objective was to create a building designed in an intelligent and thoughtful way, combining two aspects that our priori opposed to: high-tech and durable. In the collective mind, a "sustainable" building is perceived as a building constructed from natural materials with traditional techniques or forgotten (timber frame, coated lime or clay, ...). Conversely, when talking about a high-tech building, we imagine rather large windows, clean lines and advanced technology, or even a "smart" building. Through this project, we want to change prejudices and design a building both environmentally friendly and at the forefront of today's technologies. To achieve this, the principle is to put technology at the service of ecology. Thus, when designing the project, several thrust studies identified the optimal solutions: Dynamic Simulation, PEB study of natural and artificial lighting study, study of solar masks, blower-door, analysis of the life cycle, etc. . Moreover, during the life of the building users and visitors can be informed and aware of sustainable development: teaching screen that provides real-time information (consumption, temperature, ...), visible natural materials, dry basin green roof, etc.

Energy consumption

  • 35,00 kWhep/
  • 163,00 kWhep/
  • 62,00 kWhef/
  • - Heating: 52 319 MJ / year according PEB - Cooling: 0 MJ / year (dynamic simulation: no need for cooling) - Ventilation: 7.006 MJ / year according PEB - ECS: neglected - Lighting: 23 666 MJ / year (according PEB) - Electricity another: 110 278 kWh / year (estimated from average consumption before work) - photovoltaic production: 43,000 kWh / year

    Actual consumption is not yet known because the building is in operation for less than a year. In addition, adjustments of technical facilities are adjusted throughout the first year of the building and therefore it is not very representative of the actual consumption.

  • 467,00 kWhep/

Envelope performance

  • 0,40 W.m-2.K-1
  • Extention (UBAT = 0.29 W / m² K): - Facades: Timber frame with insulation blown in cellulose (22 cm) and wood fiber (5 cm) - Ground Floor: floor slab insulated with sprayed PUR (12 cm ) and slab finishing polished concrete - roof terrace: gîtage wood insulated with rock wool (16 cm) - warm roof - main roofing: gîtage wood insulated with blown cellulose (average 34 cm) - compact roof - Windows: double glazing (Ug = 1.0 W / m² K) and aluminum chassis (Uw = 1.13 W / m² K) Existing (UBAT = 0.5 W / m² K): - fronts: isolated from the outside with PIR ( 10 cm) - Wall against vv: isolated from the outside with the projected PUR (10 cm) - buried walls: not isolated - ground floor: isolated at the bottom with the projected PUR (10 cm) - basement floor: slab on non-isolated floor - flat roof: insulated exterior with rock wool (16 cm) - Windows: aluminum frame and double glazing not replaced existing (Ug = 1.1 W / m² K)

  • 0,43
  • EN 13829 - q50 » (en m3/h.m3)

  • 2,31
  • CoRI: "It is very comfortable not having to think about turning on and off lights in different local Regarding the setting of the temperature and air exchange, people who are in charge of the system. are very friendly. "


    • Heat pump
    • Low temperature floor heating
    • Individual electric boiler
    • Others
    • Floor cooling
    • Free-cooling
    • Double flow heat exchanger
    • Solar photovoltaic
    • Heat pump
  • 48,00 %
  • Space heating is provided by an aerothermal heat pump (COP 3.32). This feeds a heated floor in the extension and a forced air heating in the existing building. Also in the "Products" tab. The heat pump is reversible, this system can also cool the building if needed. However, the dynamics simulation showed that the active cooling was not necessary, so this is only a security. The extension and the existing building are ventilated via a double-flow mechanical ventilation system with heat recovery (78% yield). The ventilation unit is equipped with a bypass to avoid overheating in summer. The building can be cooled naturally by opening windows on opposite facades. A small electric heater allows for hot water in the shower and kitchen sink but drinks in hot water the building is minimal.

    The 196 photovoltaic modules placed in the garden at the rear of the building achieve an output of 50.7 kWp for an estimated annual production of almost 43,000 kWh. The electricity produced will be completely self-consumed. Indeed, many measuring devices present in laboratories operate continuously and require huge electric power. The return on investment time is estimated at 6 years.

Smart Building

    All building technology are managed by the GTC. Some information is transmitted in real time on the teaching screen placed in the building lobby. Thus, occupants and visitors can follow live the evolution of conso

    With equipment installed in the building, and primarily the GTC, the building is ready for connection to a Smart Grid. Alas, these are not yet available in this region.

    CoRI:"It is very comfortable not having to think about turning on and off lights in different local Regarding the setting of the temperature and air exchange, people who are in charge of the system. are very friendly. "

Urban environment

    The building is located on the CSE website (Scientific and Technical Centre for Construction). The choice of location of the extension is due to an energy reflection (North-South direction) but also a desire to provide better visibility to the building (to avoid confusion with the CSTC). The site already had a correct biological quality by the presence of a meadow behind the building and a wooded area on the back edge of the field. Interventions on biodiversity are: placement of two hives in the garden, various plantations around the building, extensive green roof, dry dock, new permeable parking. The majority of the site is verdurisée. DSUB = 0.0007 (destruction coefficient of useful areas for biodiversity) NSUB = 0.1 (coefficient of useful new areas for biodiversity) CBS = 0.85 (biotope surface coefficient)

  • 10 854,00 m2
  • 6,00 %
  • 8 400,00


    Rockpanel Colours


    Thierry De Hemptinne - 0473/30.09.33

    Finishing work / Exterior joinery - Doors and Windows

    Rockpanel panels are prefabricated compressed mineral wool and amalgamated with thermosetting binders. The outer surface is coated with four layers of polymer emulsion paint in aqueous phase, available in a rich palette of colors. Rockpanel suitable as facade cladding, finishing panels and roof details and perimeter trim (soffits, exterior ceilings, etc.).

    Rockpanel were used to achieve the cladding of the existing building and extension, but also to make the sunscreens that provide the colored buttons on the existing building. In addition to their environmental benefits (BRE label A + / A), Rockpanel allowed to reproduce on the facade identity colors of society, through collaboration with Akzo Nobel has provided adequate paint.

    Cellulose i3


    [email protected]

    Finishing work / Partitions, insulation

    Cellulose is made from waste paper newspapers. The i3 cellulose is produced in Belgium on a highly efficient production line. Its lambda value of 0.038 W / mK allows it to compete with insulation of mineral origin.

    The cellulose was blown into the timber frame facades (22 cm) and the main roof (34 cm in average).

    Wood fiber insulation Steico Flex


    [email protected]

    Finishing work / Partitions, insulation

    flexible and compressible insulation panels wood wool. lambda value of 0.038 W / mK.

    This natural insulation material is very suitable to be placed between the rafters of the technique against bulkhead. In it also pass various techniques of small diameter such as water supplies or electrics pipes. This technique against bulkhead also allows not to break the air seal during placement of wall mounts.

    Heat treated wood siding DC-Wall


    [email protected]

    Finishing work / Exterior joinery - Doors and Windows

    This ayous cladding ensures outstanding stability on both the rigorous care of during sawing. Softwood ayous is subjected to heat treatment with steam, under conditions of high temperature and high pressure that alter the long term. In a climate like ours, subject to intense fluctuations in temperature and humidity, wood so changed remarkably resists better to the formation of cracks and is ideal for the application of coatings. The four kilns at the port of Ghent has a capacity of 1000 m³. The company is certified FSC since 2008.

    This cladding ayous heat treated and FSC label was chosen because it presents an interesting aesthetic, without knots, and requires no chemical post-treatment using heat treatment carried out at the manufacturer. The profile used is a "perforated false" giving the impression that the slats used are very thin. The angles tabs cutouts give a very neat finish to the wooden strip.

    reversible heat pump AWR-HT


    +33 1 (0) 1 30 95 19 19

    HVAC, électricité / heating, hot water

    reversible heat pump with high efficiency air source for outdoor installation, high temperature water. The entire range reached a much higher level of efficiency to the levels provided by the class A energy savings (heating).

    Pump aerothermal heat of a heating power of 71 kilowatts is placed on the roof of the existing building. In the extension, the heat pump supplies the heating circuit with the ground. In the existing building, it feeds two batteries preheat ventilation air. Because the heat pump is reversible, it can also be used to cool the building in summer. However, this function should not be used or bit by the building design.

    Photovoltaic solar panels Professional 60 poly

    Solar Fabrik

    [email protected]

    rated power: 260 W Number of cells: 60

    The 196 photovoltaic modules placed in the garden at the rear of the building achieve an output of 50.7 kWp for an estimated annual production of almost 43,000 kWh. The electricity produced will be completely self-consumed. Indeed, many measuring devices present in laboratories operate continuously and require huge electric power. The return on investment time is estimated at 6 years.

    Luminaire LED ArimoS


    Philippe Lefebvre - [email protected]

    HVAC, électricité / lighting

    LED luminaire with microprismatic cover CPD. A built-in exposed grid ceiling 60x60 cm module. Applications: offices, corridors, lobbies, meeting rooms, retail areas, waiting rooms, ... System LED luminaire luminous flux 4000 lm, connected load 40 W, luminous efficiency of 100 lm luminaire / W. Color neutral white light color temperature of 4000 K, color rendering index Ra> 80. Parameters of the rated lamp life: L80 rated life: 50000 hours.

    Besides the aesthetic integration in false ceilings in mineral slabs, the choice of high performance luminaires allows to significantly reduce electricity consumption for lighting. They also limit the internal loads and therefore summer overheating. These devices were used to equip every office in the extension but also a part of the laboratory to replace outdated fixtures.

    Synco building automation


    Management / Others

    The Synco 700 is a communicative and flexible pre-programmed controller. The Communication on KNX allows Synco controllers exchange a lot of information together: temperature, time programs, energy demands, defects etc. This also allows up all the information on a supervisory or directly on the web.

    Centralized technical management (CTM) allows to retrieve data from different meters in the building. These fall in energy consumption (lighting, heating, ventilation and hot water are measured separately) but also other consumption (rainwater, mains water) and energy production (via photovoltaic). These data are then communicated to the shapes and the building users and visitors via the screen placed in the building lobby. The GTC also allows users to easily set up the technical facilities. They can for instance change the desired temperature in each room.

    charging point for electric car


    Management / Others

    charging point for electric cars.

    This terminal, located on the front of a parking space, allows users or visitors of the building that have an electric car recharging during their presence in the building.

Construction and exploitation costs

  • 80 000,00
  • 250 000
  • 1 800 000
  • 141 700

Water management

  • 42,00 m3
  • 400,00 m3
  • All of the water falling on the building roof is directed to a tank of a volume of 20 m³ which allows to collect 450 m³ over the year. Rainwater is used to supply the toilets and External casseroles (for roadsides). So we limit the use of drinking water in the kitchen sink, the shower, the sanitary sinks and sinks in a few laboratories. The rainwater tank is sized for 30 days of autonomy for the toilet, so it should cover 100% of this consumption. When the tank overflows, the water is routed to a dry area. This is a depression in the ground for the collection, retention and infiltration of rainwater. This is converted into green space and thus integrated into the landscape. It prevents any discharge of rainwater into the public sewer. In addition, its location at the entrance of the site, it allows visitors and tenant awareness to the problem of rainwater.

Indoor Air quality

    Particular attention was paid to the finishing materials to limit releases of pollutants in indoor air. Paints, flooring (linoleum, tiles) and false ceilings (slabs) were chosen with an A + label emissions into indoor air. The building is equipped with a double mechanical ventilation flow with a filtration of the incoming air, which allows to obtain a good quality of indoor air. In addition, in the meeting rooms, CO2 probes to adapt the ventilation rate with the measured pollution.


    Daylight: The offices and laboratories are highly glazed, ensuring a significant amount of natural light and also views to the outside. To the south facades, fixed solar protections help to limit solar gain in summer to prevent overheating while retaining the natural light. To validate the dimensions and location of windows, the light of day factor was calculated using the Design Builder software for each room of the building. Artificial light: In each office, a brightness sensor coupled with presence detection allows a fully automated lighting management and a consistent level of brightness in the room. Power and location of lighting were chosen following a simulation carried out using the Dialux software. In offices, illuminance of 500 lux on the working plane, the index of uniformity U0 is greater than 0.6 and the glare UGR index is below 19. Fight against overheating: A simulation dynamic performed using the design Builder software was used to validate the building design, including the size of the solar fixed protection in the South, so as to prevent overheating without having to set up an active cooling system. If sunscreens and natural ventilation are insufficient, the reversible heat pump helps cool the building. Winter Comfort: The high wall insulation ensures high wall temperature, which contributes to comfort (resulting temperature dryer). The underfloor heating also brings great comfort to occupants.

    The composition of the partitions between offices ensures good sound insulation (Rw = 52 dB): Metal Stud structure 10 cm thick filled with rock wool + 2 drywall on each side. Inside the premises, false ceilings in mineral slabs guarantee good acoustic comfort by reducing reverberation. Movable partitions that allow divide the large meeting room into three smaller rooms were chosen with high sound insulation (Rw = 51 dB). The realization of a floating screed on wood gîtage the floor also provides good sound insulation for airborne and impact sound between the floor and the ground floor.

GHG emissions

  • 18,00 KgCO2/m2/an
  • All building consumptions are electric (heating, hot water, lighting, ventilation, ...). The final energy consumption is 62 kWh / m²an and we consider 0.29 kg of CO2 per kWh of electricity.

  • 50,00 an(s)

Life Cycle Analysis

    The analysis of the life cycle was conducted for two building walls: the facade of the existing building and the roof of the new building. The study compared the solution to two other alternatives that had the same level of isolati

    The supporting structure of the outer walls, the floor of the floor and roof of the extension is made of wood frame with insulation blown in cellulose. Additional insulation of wood fiber is applied inside the facades. For the existing building as for the extension, the compressed Rockpanel rockwool panels are used as facade cladding. These panels are certified BRE A + / A.

Reasons for participating in the competition(s)

Le projet "Paint it Green" est l'un des lauréats de l'appel à projets "Bâtiments exemplaires 2013". Cette récompense est octroyée à des bâtiments qui démontrent une performance énergétique et environnementale élevée. Pour obtenir cette récompense, le bâtiment devait répondre à 64 critères répartis dans différentes 4 thématiques : performance énergétique, qualité environnementale, qualité architecturale, reproductibilité et innovation.
Le bâtiment peut être qualifié de "smart building" pour plusieurs raisons :
- tout d'abord, au stade de la conception, de nombreuses études ont été réalisées (simulation dynamique de la surchauffe, simulation du niveau d'éclairage naturel, calcul de l'éclairage artificiel, test d'étanchéité à l'air, calcul des performances thermiques, analyse du cycle de vie des matériaux, etc.) afin de concevoir le bâtiment de la façon la plus intelligente qui soit, de façon à ce que, avant même le choix des équipements techniques, le bâtiment soit économe en énergie et respectueux de l'environnement.
- ensuite, la gestion technique centralisée permet de gérer les installations techniques, de réaliser un suivi des consommations, mais également de communiquer sur les caractéristiques techniques et consommations du bâtiment. En effet, un écran placé dans le hall d'entrée affiche en temps réel les données issues de la gestion technique centralisée. L'objectif est de faire de ce bâtiment un exemple qui pourra inspirer aussi bien les utilisateurs que les visiteurs du bâtiment.
Le CoRI, outre sa vocation de centre de recherche, donne également des formations aux professionnels du bâtiment et peut de cette façon toucher un large public.

Building candidate in the category

Energy & Temperate Climates

Energy & Temperate Climates

Low Carbon

Low Carbon

Smart building

Smart building

Users' Choice Award

Users' Choice Award

Green Building Solutions Awards 2016

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