Headquarters of Groupama Paris Val de Loire

9267 Last modified by the author on 19/05/2017 - 10:57
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Renovation

  • Building Type : Office building < 28m
  • Construction Year : 1970
  • Delivery year : 2017
  • Address 1 - street : 89000 AUXERRE, France
  • Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.
  • Net Floor Area : 3 579 m2
  • Construction/refurbishment cost : 2 565 000 €
  • Number of Work station : 150 Work station
  • Cost/m2 : 716.68 €/m2
  • Primary energy need
    56.4 kWhep/m2.an
    (Calculation method : RT existant )
Energy consumption
Economical buildingBuilding
< 50A
A
51 à 90B
B
91 à 150C
C
151 à 230D
D
231 à 330E
E
331 à 450F
F
> 450G
G
Energy-intensive building

New image and beautiful "overall" performance for this 70s office building where no heavy work had been done since its construction and which presented such discomforts that it became "unusable".

Complete recovery of the insulation of the envelope, its airtightness and thermal bridges.
Development of shared areas on the garden level for training with installation of LED luminaires running on presence and graduation of the luminosity.
Development of co-working spaces on the ground floor with specific acoustic study. Independent spaces mutualisable with the outside wooden terrace.
Release of the R + 2 shelf for tenants and / or co-owners with full accessibility of the site and independent management.

Sustainable development approach of the project owner

1. Make buildings compliant with current regulations.    O Accessibility    O Fire    O Asbestos 2. Bring these buildings delivered in the 1970s (45 years) to the levels of performance, comfort, ease of operation and operating costs of a new building.    O Work on their envelopes and facades, heating solutions and evaluate their costs. 3. Provide working conditions consistent with the activities housed in the building (offices, call center, meeting, shop window ...):    O Allow for evolutions.    O Make this building attractive.    O Make new digital solutions possible. 4. Examine the solutions of pooling of spaces and resources.    O Flexibility of use.    O Savings. 5. Making these buildings valuable to their heritage.

Architectural description

New image and beautiful "overall" performance for this 70s office building where no heavy work had been done since its construction and which presented such discomforts that it became "unusable". Complete recovery of the insulation of the envelope, its airtightness and thermal bridges:    • Wooden tunnel walls of the existing structure for busy site intervention and encapsulation of asbestos products. Insulation distributed in these 42cm coat walls.    • Exterior insulated exterior walls of minimum 20cm, removing all thermal bridges from the existing post / concrete beam structure.    • Terracotta shingle finish for resistance, maintenance and the "earth" side for the Cité de l'Agriculture et des services.    • Double-breaking aluminum jointed joinery Uf = 1,1 with high-performance double glazing.    • Complete renovation of roof terraces with 240mm polyurethane and treatment of acroteres. Then, implementation of "comfort and health" solutions - summer heat - by double-stream ventilation with 2 plants per level and management of bioclimatic facades by solar protection:    • Horizontal sunlight breezes on individual management and centralized by sun sensor to avoid summer overheating by wind sensor to wind up the blinds in case of strong wind and hourly programming to secure the building at night.    • Vertical and colored vertical sunscreens create masks while animating the facades. Energy performance achieved at the level of a new building:    • Factor 5 for consumption on all items, ie 289 to 56.4 kWh / m².an.    • Factor 10 for heating consumption, ie 245.8 to 24.9 kWh / m².an.         O Decrease by 50% of heating surfaces. Development of shared areas on the garden level for training with installation of LED luminaires running on presence and graduation of the luminosity. Development of co-working spaces on the ground floor with specific acoustic study. Independent spaces mutualisable with the outside wooden terrace. Release of the R + 2 shelf for tenants and / or co-owners with full accessibility of the site and independent management.

See more details about this project

Stakeholders

Type of market

Global performance contract

Energy consumption

  • 56,40 kWhep/m2.an
  • 107,40 kWhep/m2.an

    • RT existant

    CEP Heating: 24.9 kwh / m².an CEP cooling: 1.3 kwh / m².an CEP DHW: 3.2 kwh / m².an CEP Lighting: 14.8 kwh / m².an CEP Ventilation: 9.6 kwh / m².an CEP Auxiliaries: 2.6 kwh / m².an CEP Photovoltaic: 0.0 kwh / m².an

  • 289,00 kWhep/m2.an

Real final energy consumption

    56,40 kWhef/m2.an

Envelope performance

  • 0,60 W.m-2.K-1

    • Wall R-1 exterior - coated ITE:
    260 mm of concrete insulated with 200 mm of PSE Th32
    U-value: 0.152 W / m²K

    Wall RDC to R + 2 terracotta facing - metal sheet:
    Wooden tunnel walls of the existing structure for occupied site intervention and encapsulation of asbestos products. Insulation distributed in these 420 mm coat walls.
    Exterior walls insulated from the outside by 120 mm of glass wool + 80 mm of rockwool.
    U-value: 0.08 W / m²K

    Wall RDC to R + 2 patio - ITE coated:
    200 mm of concrete insulated with 200 mm of PSE Th32
    U-value: 0.153 W / m²K

    Wall RDC to R + 2 patio coated - sheet steel:
    Wooden tunnel walls of the existing structure for occupied site intervention and encapsulation of asbestos products. Insulation distributed in these 420 mm coat walls.
    Exterior insulated walls of 200 mm PSE Th32.
    U-value: 0.069 W / m²K

    Wall RDC to R + 2 patio - ITE coated:
    200 mm of concrete insulated with 200 mm of PSE Th32
    U-value: 0.153 W / m²K

    Roofing:
    Existing concrete slab of 200 mm insulated by 2 * 120 mm of polyurethane, lambda 0,023.
    U-value: 0.095 W / m²K

    Exterior wood furnishings :
    Aluminum joinery thermal bridge breaker and double glazing - Schuco AWS75.II
    Average Uw: 1.3 W / m²K
    Ug glazing: 1.0 W / m²K
    Insert: 0.04 W / mK
    Solar factor: G = 46%

  • 1,17

    • EN 13829 - n50 » (en 1/h-1)

Systems

    • Gas boiler
    • Water radiator
    • Individual electric boiler
    • VRV Syst. (Variable refrigerant Volume)
    • Double flow heat exchanger
    • No renewable energy systems

Smart Building

    Dynamic front

Urban environment

  • 7 688,00 m2
  • 1 732,00

    • Site comprising 3 headquarters built in the years 67 and 70 in the heart of a residential area grouping together individual and collective housing.

Product

    Zephyr evolution

    Terreal

    [email protected]

     http://www.terreal.com/

    Gros œuvre / Structure, maçonnerie, façade

    The oldest building material in the world, terracotta is obtained by the firing of clay. It is this natural raw material that gives it its strengths.
    • Economical and lightweight
    • Durable and maintenance-free
    • Simple and fast rail mounting
    • Simple, long-skinned cladding: up to 150 cm

    In total agreement with the site "The City of Agriculture and Services"

    ASW 75 II

    Schüco

    Jean-Marc GAUDARD; [email protected]

     https://www.schueco.com/web2/fr

    Second œuvre / Menuiseries extérieures

    Aluminum joinery thermal bridge breaker and double glazing - Schuco AWS75.II
    Average Uw: 1.3 W / m²K
    Ug glazing: 1.0 W / m²K
    Insert: 0.04 W / mK
    Solar factor: G = 46%

    Well accepted

Construction and exploitation costs

  • 295 000 €
  • 2 565 000 €

Energy bill

  • 7 500,00 €

GHG emissions

  • 8,00 KgCO2/m2/an

    • THCex Regulatory Calculation Methodology

Building candidate in the category

Energie & Climats Tempérés

Energie & Climats Tempérés

Coup de Cœur des Internautes

Coup de Cœur des Internautes

Green Solutions Awards 2017 - Bâtiments
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Annick Worobel

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