- Building Type : Collective housing < 50m
- Construction Year : 2015
- Delivery year : 2016
- Address 1 - street : 31400 TOULOUSE, France
- Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.
- Net Floor Area : 3 681 m2
- Construction/refurbishment cost : 1 886 450 €
- Cost/m2 : 512.48 €/m2
Primary energy need :
(Calculation method : RT 2012 )
The operation aims to densify a residence of 30 social rental housing, located near public transport (metro, bus).
The design in 2 buildings was chosen to minimize the solar masks and preserve the views of the existing apartments, in a very constrained site.
The chosen technique, wood-concrete, made it possible to use the prefabrication of structural and envelope elements, thus reducing the nuisance of the occupant's work and the needs for site installation.
This technique also made it possible to design "heavy concrete cores, made up of floors and partitions, and a light, only insulating shell, made of wood framing. This provision provides a thermal mass "protected" external stresses. The Toulouse climate has, in half-season of strong differences in day / night temperatures, whose inertia of the building decreases the amplitude.
Several sunscreens are used: projection wood blinds, solar shading, immediate use, ventilated roofs, double orientation apartments ...
Domestic hot water is preheated by solar panels with collective storage. The expected low consumptions allowed the adoption of intelligent electric convector heating for small dwellings (T1, T2) and individual gas heating for higher typologies.
The installation of probes and counting allows, through a dedicated site, tracking consumption by tenants on PC or smartphone.
The operation is the winner of the call for projects "economical buildings" of the ADEME and the Midi-Pyrénées region and is the subject of an experimental follow-up over 4 years. Biosourced Level 3, it is part of the Toulouse Métropole Climate Plan.
See more details about this projecthttps://conseils.xpair.com/actualite_experts/residence-les-magnolias-1ere-labellisation-batiment-biosource-occitanie.htm
Other consultancy agencyTPFi Monsieur Jérome Malbert BET TCE
Construction ManagerATP PAYSAGE Jerome Classe - email@example.com LANDSCAPE
Assistance to the Contracting AuthorityNOVACERT Monsieur Cedric Juvenelle - firstname.lastname@example.org ENVIRONMENTAL AMO
CompanyMET ENERGIES LAURENT GARABUAU - email@example.com , 05 65 77 27 04, 06 80 92 58 89 developer of the energy coaching tool and @magnolias services.
Owner approach of sustainability
CDC HABITAT (formerly SNI) has initiated the 23 collective housing project in TOULOUSE (31200) in a Habitat & Environment Profile A certification process, the BIOSOURCE BUILDING and E2 C1 labels issued by the CERQUAL certification body.
As such, CDC HABITAT is included in the policy by the Sustainable Development Group. This policy aims to reduce environmental impacts by setting up an organizational, technical and information management system.
The environmental profile targeted for this operation is also multiple:
Environmental Management of the Operation, applied from the programming phase until the building operation.
Clean site, with the consideration of local residents since the project came to complete a 1st tranche. The construction took place on a busy site.
Energy - Reduction of the greenhouse effect: the energy commitment is strong on this project, with the achievement of the labels Effinergie + and E + C- (Level E2, Level C1).
Constructive sector - Choice of materials: the operation was labeled Biosourced Building Level 3
Comfort and health: Shared gardens were made available to residents on the operation, at the foot of buildings.
Green gestures: a booklet has been distributed to all inhabitants to make them aware of the good things they have to do to live better and consume less.
With the will to carry out an exemplary operation, the operation engaged in the CALL TO PROJECT - SESSION 2013 ECONOMIC BUILDINGS OF ENVIRONMENTAL QUALITY IN MIDI-PYRENEES and was winner. Highlights were: Habitat & Environment certification Profile A, biobased label level 3 and Effinergie +. With the particularity to follow for the lessor and the tenants their consumptions in their lodging.
This recognition gave an impetus to CDC HABITAT, which subsequently initiated the E + C- label project.
Densifying in urban areas a piece of land that is little used by the existing building, and close to public transport, brings a clear benefit: the reduction of the financial and ecological cost of travel. But it also brings many and varied constraints to which the project must adapt:
- the existing building, its influence, its jigs, its orientations, its views.
- the terrain and its geometric and regulatory constraints (PLU)
- the presence of residents on site and the management of nuisances.
- the organization of a construction site in constrained spaces.
The program led us to design volumes playing with these constraints, the views, the sun.
The buildings, labeled Biosourcé, had to assert this characteristic, by cladding wooden clapboard. It is therefore two buildings, clad in wood, which line up along the way. The forms, simple, contrast with the existing building.
A central plot articulates the accesses to the three buildings, located on different levels.
- 38,30 kWhep/m2.an
- 51,90 kWhep/m2.an
- 24,89 kWhef/m2.an
- 0,44 W.m-2.K-1
- Individual gas boiler
- Electric radiator
- Individual electric boiler
- Individual gas boiler
- Solar Thermal
- No cooling system
- Humidity sensitive Air Handling Unit (Hygro B
- Solar Thermal
- 9,30 %
- 196,00 KgCO2/m2/an
- 15,90 KgCO2 /m2
- 50,00 an(s)
- 1 110,00 KgCO2 /m2
Life Cycle Analysis
- 376,00 kWhEP
- 1 626,00 m3
Health & Comfort
Monsieur Laiurent Garabuau - firstname.lastname@example.org
Management / Others
System for collecting individual consumption data with centralization on a server and display on a PC, tablet or smartphone. The system allows each tenant to check their consumption (water, gas, electricity, heating, DHW) in real time and to influence their way of life. The display can be done in euros.
Tenants regularly consult the site. A follow-up over 4 years will make it possible to evaluate the possible modifications of consumption.
Located in Rangueil University District, between Faculty of Pharmacy, Science and Social Housing, the operation is located along a major axis of traffic, the urban fabric unstructured. The densification of this plot where is already located a residence 30 rental social housing was considered, in a very constrained area:
- by creating a frontality and an alignment on the path of the Maraîchers
- organizing the various buildings to minimize solar masks and preserve the views of existing apartments
- by organizing car parks while preserving collective green spaces
- by creating gardens shared by all the tenants of the residence
- while adapting the altimetry of the different buildings and tracks
Land plot area
4 246,00 m2
1 141,00 %
23 air spaces and basement