Tourist office of Troyes

7150
Last modified by the author on 05/09/2014 - 15:18

Renovation

  • Building Type : Other building
  • Construction Year : 1550
  • Delivery year : 2013
  • Address 1 - street : Rue Aristide-Briand 10000 TROYES, France
  • Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.

  • Net Floor Area : 712 m2
  • Construction/refurbishment cost : 2 638 000 €
  • Number of none : 100 none
  • Cost/m2 : 3705.06 €/m2

Certifications :

  • Primary energy need
    108.29 kWhep/m2.an
    (Calculation method : RT 2005 )
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

This operation adopts an environmental quality approach and aims for the BBC Renovation label thermal performances. The building won the PREBAT 2011 call for proposals of Champagne-Ardennes “Efficient réhbilitation with environmental quality" supported by the regional delegation of ADEME and the Région Champagne-Ardennes.

Goals:

  • Consolidat the premises of the Tourist office of Troyes and municipal services in charge of the city promotion in a place symbolizing the architectural heritage of the city.
  • Restore and renovate the ancient building in accordance with the conservation and development plan (PSMV) and in line with the transferability and the parcel plan from the 13th Century.
  • Valorize and preserve the representative marks of the building evolution, especially concerning the façade.
  • Adapt a 16th Century building made with wood panels to a public access building (ERP) while ensuring users comfort and respect of accessibility, acoustic and thermal regulations.

 

Sustainable development approach of the project owner

This operation adopts an environmental quality approach and aims for the BBC Renovation label thermal performances. The building won the PREBAT 2011 call for proposals of Champagne-Ardennes “Efficient réhbilitation with environmental quality" supported by the regional delegation of ADEME and the Région Champagne-Ardennes.

The environmental profile of this operation mainly aims for: energy management, hygrometric and acoustic comfort, air quality, the choice of construction processes and products and management of a low environmental impact building site.

This project combines heritage development and adaptation to use thought building accessibility, care for energy performance and comfort users. Use of materials, such as hemp, that have properties of hygrothermal regulation, contributes to achieve satisfactory comfort and air quality inside the building.
An acoustic study was conducted in order to reduce exterior noise perception and interior noise propagation. Further analyses (a dendrochronology study in order to dating wood and analyzing pigments) have confirmed restoration choices of the project.

To minimize the environmental impact of demolitions and observe the existing provisions, the materials in place have been carefully sorting aiming to maintain maximum of it: reuse of joists, wood beams and adapted structural supplements, restoration of stones and bricks chimney. Also, local materials have been privileged: stone, hemp, oak, poplar, terracotta tiles or Burgundy ocher for coats and paints.

Bioclimatism
- Hemp concrete contributing to the thermal inertia of the building
- Double windows assembled on adjustable pivots (for part of the extension)

Hemp uses and characterization:
This project gives a large place to the hemp concrete use. It is used to fill the timber frame, the insulation of roof and existing basement screed. It combines respect of constructive traditions, contemporary application, energy performance and environmental impacts limitation. Its implementation is followed by an energy monitoring program and a characterization of construction hemp. The city of Troyes wishes to promote this local resource. Its goal is to prove the viability and efficiency of this natural material to improve the energy performance of traditional houses of Troyes and its sustainability.

The building has been equipped with sensors inside and outside of the walls in order to analyze the phase difference process, the hygrometry regulation and performance of breathable materials. These reports will be analyzed by a scientific committee of local and national partners (City of Troyes, FRD - research and development fibers-, FFB -Building French Federation-, EDF -Electricity of France-, ADEME Champagne-Ardenne -Environment and energy efficiency agency-, LCDA – the hemp fabric of Aube-, CAPEB -Federation of crafts and small businesses of the building-, ENTPE -national school of State civil engineering-)

Acoustic management of the building
The structure of the building demanding constraints of limited weight, the floors had to combine sound insulation and lightness. As concretes, even lightweight, were not adapted, the implemented solution consists of gypsum and cellulose plasterboards on a bed of 3cm rivers gravels in a honeycomb structure.

A particular solution has also been designed to manage the problematic of operating noise of the heat pump. The regulation on protected sector and the acoustic regulation made impossible its installation on the outside. So, it has been installed in a technical premise designed as a sound trap.
It has been equipped with an air intake and outlet generously dimensioned to ensure the air intake required for the pump while limiting the runoff and caused noise (dynamic regeneration).

Lighting:
- Fluorescent lamps and LED with energy-saving
- Motion sensors and magnetic loops
- Building management system (BMS)
- High-performance lighting system controlled for the large group reception room

Architectural description

The building, whose constructive system and base architectural composition are from the 16th Century, shows constructive evolutions of timber-framed houses typical of Troyes. Acquired by the city and restored for the first time in 1976, it was a nursery and apartments until 2009. The tourist office consists of a timber-framed building from the 16th Century and an expansion.

It is organized on five floors:
- A reception and information space, a shop and an office area on the ground floor
- A training room, equipment and storage premises in the basement
- A group reception room (66 people), toilets and an office on the 1st floor
- Offices, a relaxation room, a kitchenette and toilets on the 2nd floor and in the attic
- Independent public toilets accessible from the public space.

Construction method
- Timber frame filled with hemp concrete
- Low walls made with mixed stones of Burgundy and bricks
- Foundation walls in white concrete (for the expansion)

Finishes
- Visible exterior wood-frames, treated with a colored distempers
- Lime coats on the outside and lime and lime/hemp coats on the inside
- Terracotta tiles of the Aube in the basement
- Sanded and waxed Burgundy stones and white concrete finishes on the ground floor
- Linoleum floors on the upper floors
- Breathable paints made of ocher based on linseed oil and Burgundy soil.
- Gypsum and cellulose walls dissociated from the ground

Heritage and resources preservation
The study of the composition of original paints confirmed that wood frames was painted in ochre, browns and green tons from the initial building in the 16. Century. This study has justified the choice of an ochre paint made of linseed oil and Burgundy soil.

She has supported the choice of a painting ocher-based linseed oil and land of Burgundy. A dendrochronology study (wood dating) allows identifying the construction date of the various parts of the building. The restoration choices has been made for the sake of a preservation approach of historical characteristics of different periods (16th-17th Century)

See more details about this project

 http://www.arcad-ca.fr/documents/Fiche_ARCAD_Maison_Tourisme_Troyes_Web.pdf

Stakeholders

    Contractor

    Ville de Troyes


    Designer

    Claire Perron, architecte du patrimoine, ville de Troyes


    Thermal consultancy agency

    MCI THERMIQUE


    Structures calculist

    I.D.S




    Company

    LEON NOEL SAS sous-traitant : M&M DÉSAMIANTAGE


    Company

    CAPRISTO soustraitant : EXATEC



Type of market

Global performance contract

Energy consumption

  • 108,29 kWhep/m2.an
  • 185,82 kWhep/m2.an
  • RT 2005

    - Heating: 48,686
    - Cooling: 5,477
    - Hot water: 0
    - Auxiliary: 8.732
    - Ventilation: 30.692
    - Lighting: 14,704

  • 205,00 kWhep/m2.an

Real final energy consumption

    41,97 kWhef/m2.an

Envelope performance

  • 0,92 W.m-2.K-1
  • I4

  • 1,70

More information

Pimary energy need calculated on the basis of Th-CE-ex (ex global thermal regulationl)
Only conventional uses: Level of Renovation BBC Label for tertiary buildings in 2009

Systems

    • Heat pump
    • VAV System
    • No domestic hot water system
    • No cooling system
    • Single flow
    • Double flow heat exchanger
    • No renewable energy systems

    Heating:
    - Aerothermal and reversible helectric eat pump with variable refrigerant output (DRV) controlled by temperature sensor and clock
    - Suplemental heating by electric battery

Smart Building

    BMS for heating, ventilation and lighting

Urban environment

    Situated in a protected area, the Tourist office is in the heart of "Bouchon de Champagne", historical center of the town and gives onto the city hall square.
    The building, whose constructive system and base architectural composition are from the 16th Century, shows constructive evolutions of timber-framed houses typical of Troyes.

Water management

    Water: valves equipped with an electronic control

Indoor Air quality

    Breathable paints made of ocher based on linseed oil and Burgundy soil.

    Ventilation:
    - Double flow ventilation controlled by scheduled programming and motion sensors in meeting and group rooms.
    - Simple flow extraction to adjoining premises controlled by scheduled programming
    - Aerothermal and reversible heat pump regulated by temperature sensor and clock

Life Cycle Analysis

    Hemp concrete; stone; wood (oak, poplar); lime; terracotta.

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