Rehabilitation of the Chedigny Presbytery

4690
Last modified by the author on 19/06/2019 - 19:42

Renovation

  • Building Type : Other building
  • Construction Year : 1600
  • Delivery year : 2017
  • Address 1 - street : 5 Place de la Mairie 37310 CHéDIGNY, France
  • Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.

  • Net Floor Area : 280 m2
  • Construction/refurbishment cost : 390 731 €
  • Number of none : 7 none
  • Cost/m2 : 1395.47 €/m2

Proposed by :

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

The village of Chédigny enjoys a certain notoriety because of the quality of its development by some 800 rosebushes (including 200 of "old" variety). This qualitative character of the village, in particular linked to its good environmental management, allowed it to obtain the distinction of "remarkable garden". In this context, the development of the Presbytery and its "parish garden" is an element that complements this plant and cultural heritage. The presbytery was owned by the municipality and rented for decades to a family who had made his second home, with a rent more than modest. The tenant can not come on site and maintain the premises, so the municipality has decided to take over his building, to redevelop into bed and breakfast and the surrounding closed field to make a garden priest as he was probably at the origin. The building was no longer habitable in the state, the heating oil obsolete, the joinery not waterproof, the ceilings not isolated.

Sustainable development approach of the project owner

Attention has been payed as much as possible on the use of local and recyclable materials. It was favored the clay that comes from a local production (about 50 km), as well as straw rapeseed produced within a radius of 25 km. A parish garden has been developed, with the planting of many plants, fruit trees from old local species somewhat forgotten, annuals and perennials of local origin.

Architectural description

The architectural qualities of the building will be preserved and improved: -the wooden joinery will be replaced by woodwork of the same type, same material and same invoice, while having the qualities required to meet the requirements of sufficient energy saving recommended today by the thermal offices.-the coldest walls located on the north facade of the building will be doubled and insulated with materials corresponding to the thermal regulation required in existing buildings, as well as for the attic where will be unrolled from the Mineral wool in 300 mm minimum.-Tiles and old parquet will be preserved and restored, as well as all the remarkable architectural pieces, such as stairs, interior doors, beams, plastered ceilings, etc.-the roof in small flat country tiles, currently in poor condition will be restored to the same existing with matte rials reuse.

See more details about this project

 http://www.envirobatcentre.com/upload/document/biosource/palmares/2017/participants/FILE_5a20267f999ff_10___chedigny___presbytere_vf.pdf/10___chedigny___presbytere_vf.pdf

Photo credit

Chédigny town hall

Contractor

Construction Manager

Stakeholders



    Company

    Entreprise LAURENCON -Entreprise BVI- Entreprise DOMINGUES

    Companies of biobased lots

Energy consumption

     Need for heating: 39kWhep / m².an

Real final energy consumption

    85,00 kWhef/m2.an

Envelope performance

    Roofing: Up = 0.13 W / m²K
    Floor Low: Up = 2 W / m²K
                                                                                                             

Systems

    • Boiler fuel
    • Heat pump
    • Electric radiator
    • Individual electric boiler
    • Nocturnal Over ventilation
    • No renewable energy systems

Product

    Materials implemented
    -Structure: Moellons and cut stone
    -Isolation: Wood wool / clay mix, natural lime and rapeseed straw chips
    -Exterior coating: lime plaster sand and plaster
    -Interior furnishings: Wood

    Finishing work / Partitions, insulation

    DRC
    Peripheral walls
    Walls of 50 cm in rubble and stone (tuffeau), covered with a lime sand and plaster.
    - Pursed walls to rid them of all their old disparate coatings,
    -Isolation by adding by bunching a clay / lime mixture
    -natural and rapeseed straw chips with a thickness of about 15 cm.
    -Finition made by applying a coating of the same kind, but with much finer shavings of hemp fiber.

    Finishing work / Partitions, insulation

    Floor - Peripheral Walls
    Insulation with 15 cm thick wood wool panels.

    Finishing work / Partitions, insulation

    Intermediate floor Oak joists of 20/20 on which are laid mud floors 12 to 15 cm thick over a large part, with a floor tiles old tiles, and oak flooring on a part more small (about 1/3 of the surface).

    Finishing work / Partitions, insulation

    Low Up Floor: W / m²K Low floor partly on solid ground, partly on vaulted cellar, flooring and two different types. Part is poplar flooring traditional laying, and another part of the building (about 2/3) is terracotta tiled from the beginning of the 20th century. All these elements have been preserved and restored.

    Finishing work / Partitions, insulation

    roofing
    Traditional roof with two sides at 45 °, made of small flat country tiles.
    The insulation under the slope and partly in the flat ceiling, is made by two crossed layers of wood wool panels of 2 times 15 cm thick.

Construction and exploitation costs

  • 390 731

Indoor Air quality

    Over-ventilation of the building has been deployed to guard against the risk of entraining water vapor in the walls following their implementation.

Comfort

    A garden in the streets, rose bushes climb on the facades, sidewalks have given way to shrubs of roses, perennials and bulbs. A flower village with 800 roses, thousands of perennials and bulbs.

    The garden gathers different varieties: old vegetables, annual and perennial flowers, medicinal and auxiliary plants, orchard.

    The vault is bloomed with rosebushes and clematis trellised by some braces of wire which allows to obtain a stained glass effect. In the center of the vault, apple trees and pear trees.

    The walker is invited to cross this long flowery and greedy vault to discover the "square of the apothecary" or the garden of simple (the priest used frequently the medicinal plants to cure). In the center a basin, evokes the baptistery by welcoming the water and the heavens. The pergola has, on this side, arches in the shape of arches evoking a medieval cloister.

    Then there is the garden of the highly symbolic cross, the quintessence of the parish garden with its friendly companion of familiar flowers, old and mossy roses, utilitarian plants. To feed they are grown vegetables, berries and condiments. In his heart is erected a high metal cross.

    The presbytery has a banquet hall and often hosts concerts

Life Cycle Analysis

    The use of biobased materials has been favored to help preserve the intrinsic qualities of this building of the seventeenth century stone tufa. The peripheral walls of the ground floor are insulated by a mixture of clay and rapeseed straw and the insulation of the floor and the attic was made with wood wool and hemp wool. Thus the implementation of the clay / straw mixture on the ground floor is carried out as part of a research project currently under way locally on the development of an insulation based on plant aggregates.

Reasons for participating in the competition(s)

Le projet concerne la réhabilitation du presbytère et de son jardin. Le jardin est ouvert au public, et le bâtiment présente un espace accueil-salon de thé au rez-de-chaussée, un espace de formation, et des chambres d’hôtes aux étages (1er étage et combles aménagées). Le recours aux matériaux biosourcés a été privilégié afin de contribuer à préserver les qualités intrinsèques de ce bâtiment du XVIIe siècle en pierre de tuffeau. Les murs périphériques du rez de chaussée sont isolés par un mélange d’argile et de paille de colza et l’isolation des l’étage et les combles a été réalisée avec de la laine de bois et de la laine de chanvre.Ainsi la mise en œuvre du mélange argile/paille au rez-de-chaussée est réalisé dans le cadre d’un projet de recherche en cours localement sur le développe-ment d’un isolant à base de granulats végétaux. (Test des conditions de mises en œuvre, des mélanges utilisés ainsi que les temps de séchage). La principale limite à l'emploi de ce mélange a été le temps de séchage très long qui a retardé le chantier de plusieurs mois. Une sur-ventilation du bâti-ment a été déployée pour se prémunir contre les risques d’enfermement de la vapeur d’eau dans les parois suite à leur mise en œuvre. Autre constat, que nous avons pu faire, c'est que les panneaux de laine de bois avaient tendance à se tasser dans le temps, nous avons alors dû tasser le matériaux à la pose afin de limiter le phénomène.Les menuiseries sont fabriquées par une entreprise de la commune qui emploi des bois issus d'une filière locale. Les laines de bois ont été privilégiées, aussi bien pour leurs qualités thermiques, qu’écologiques et leur recyclabilité.

Building candidate in the category

Energy & Temperate Climates

Energy & Temperate Climates

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Green Solutions Awards 2019 - Buildings
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Emmanuel d'Envirobat Centre


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