- Building Type : Isolated or semi-detached house
- Construction Year : 2013
- Delivery year : 2013
- Address 1 - street : 36 rue Georges Clémenceau 11400 CASTELNAUDARY, France
- Climate zone : [Csa] Interior Mediterranean - Mild with dry, hot summer.
- Net Floor Area : 89 m2
- Construction/refurbishment cost : 104 949 €
- Cost/m2 : 1179.2 €/m2
Primary energy need :
(Calculation method : RT 2012 )
The Positive Social Housing project is primarily a sustainable development project on the scale of a territory. It brought together the city of Castelanaudary, the social landlord Habitat Audois, students and teachers of the Building trades Andreossy Highschool of Castelnaudary and TERREAL company; a constructive solutions manufacturer for building envelopes and a major economic player of the region.
The project is the brainchild of four partners:
- Imagine an exemplary territorial project of Vallons de Griffoul Eco-district consisting in two positive energy houses using local materials mainly from extracted locally clay. The cost of construction and maintenance of the houses had to be compatible with the financing of social housing and therefore controlled. The materials selection and systems are robus and simple to operate. It is also designing efficient housings in which the human factor remains at the center.
- Build: Positive Social housing is a concrete project. Two houses were built by local actors, introducing innovative techniques with the support of Terreal for their implementation. The construction was achieved in accordance with the principles of bioclimatic architecture and particularly focused on the summer comfort for the future residents.
- Understand: The Positive Social housing project allowed each player to understand how we imagine and how to build buildings that can compensate all consumptions of the house and its occupants by producing renewable energy at an exemplary cost. This project was also an excellent teaching tool for students in high school who imagined the technical solutions for shaders.
The Positive Social Housing project is also the practical support for the research conducted in 2015 by a PhD student at the University of CERTOP Toulouse. The research aimed to understanding the influence of the occupant behavior on the home performance, in order to work on supporting change management. That way, these positive energy buildings stay positive even with their inhabitants, and without coercion, to really meet the challenge of energy sobriety.
This case study concerns the 3-room house.
See more details about this projecthttp://www.habitatsocialpositif.com/
3rd part certified
ManufacturerTERREAL isabelle Dorgeret Contribution to the initiation and project success
InvestorHabitat Audois Monsieur Armand Cathala Contribution to the initiation and success of the project, social landlord and owner of the house
Environmental consultancyVille de Castelnaudary Monsieur le Maire Contribution to the initiation and project success
OthersLycée Andréossy de Castelnaudary Monsieur le Proviseur Contribution to the initiation and project success
Construction companyLes Provinciales M. Ludovic Garcia Builder
DesignerAEAA Cécile Escourrou Architect
Thermal consultancy agencyCITE Vergé Alain Biard Thermal calculations
Certification companyCEQUAMI Maxime Parent Du Chatelet Certification Bepos Effinergie 2013 and Effinergie +
OthersCERTOP Madame Zelem Tenure of housing, habitat and occupants interraction
Owner approach of sustainability
The goal was to learn and understand how to make a positive energy house controlled cost with actors and local materials, furthermore, to understand how it is occupied by the inhabitants to subsequently propose technical solutions that will adapt to occupiers and not the reverse. Make houses really positive energy!
The project consists of two adjoining houses T3 and T4 using building materials made locally and respecting the principles of bioclimatic architecture
- 41,00 kWhep/m2.an
- 62,00 kWhep/m2.an
- 53,17 kWhef/m2.an
- 0,28 W.m-2.K-1
Real final energy consumption
- Electric heater
- Wood boiler
- Heat pump
- No cooling system
- Humidity sensitive Air Handling Unit (Hygro B
- Solar photovoltaic
- Wood boiler
- 158,40 %
Calibric TH evolution TERREAL
Gros œuvre / Structure, maçonnerie, façade
New generation heat-resistant brick R = 1.15 Brick m²K / W. A highest quality of construction thanks to glued-down installation, adapted also to collective works. Perfect compatibility with the range of monoliths accessories of TERREAL for special point’s treatment.
Regulation and certifications: Calibric® Th evolution under DTA CSTB No. 16 / 09-586 of 17/05/2010 (under revision) and Certificate No. 409-238-586 12/04/2012. It meets the requirements of NF EN 771-1 / CN " "Specifications for masonry units - Part 1: Clay brick buildings"; CE Products * NF in NF and NF S * Th * *
The certified characteristics for the NF Brick Terracotta is the appearance (for horizontal perforated bricks only), dimensions, dry bulk density, bursting, the expansion due to moisture, compressive resistance, resistance to hard impacts, resistance to scuffing, durability (frost resistance). The NF Thermal also certifies the thermal characteristic of the model.
The thermal resistance of the wall combining certified model is validated on the basis of a calculation. The NF Seismic also certifies the use for buildings subject to seismic requirements.
See the video shot with the building firm on the site dedicated to the project http://www.habitatsocialpositif.com/construire-hsp/en-images/videos/
LAHEROOF System - ECS Thermodynamics calories coupled with a collector placed under the tiles
Génie climatique, électricité / Chauffage, eau chaude
Sloping roofs are traditionally ventilated on the underside of hedging products. Passing under the terracotta tiles, the air warms. This innovation can recover the energy of this air space. The heat recovered is used to heat the incoming air in a heat pump water heater which makes possible to improve the performance.
The system is placed between the tiles and the roof underlay screen in the thickness of the roof, it is connected by a tube to the heat pump of water heater. The complete system enables to lower the power consumption of the heat pump of water heater.
-20% reduction of electricity consumption in the hot water system for sanitary use. Due to its global approach of homes energy performance, this system improves the overall technical-economic ratio of individual houses according to current regulations.
The thermal system is installed at the same of the laying tiles or a posteriori by lifting a few tiles. The system was adopted easily by the stakeholders of the project. Laheroof performance is valuated in the regulatory thermal calculation holding an "arrêté titre V"http://www.construction21.org/france/community/pg/file/846/read/19355/titre-v-prise-en-compte-du-systme-laheroof-_-arrt-du-13octobre2014
Second œuvre / Cloisons, isolation
The dividing wall between the living room and bedrooms is mud brick, which helps to regulate the relative humidity of the pieces by increasing the feeling of comfort and significantly improve summer comfort.
The partition is mounted like any clay or plaster wall tile, it must nevertheless take particular care in choosing the coating and its application to allow the wall develop their hygrothermal properties.
The HSP operation counts two houses, a 3-romm and a 4-romm, which consume less energy than they produce. They are built in eco-district Vallons des Griffoul in Castelnaudary with locally manufactured sustainable building materials. This case study covers the 3-room house. The ZAC "Vallons des Griffoul" won the “New Sustainable Urban Forms" prize awarded by the Languedoc Roussillon region in 2010.
Designed on the model of an eco-district, it offers new forms of housing in a sustainable and innovative neighbourhood; it is adapted to the needs of the population in all its diversity, respect the local identity and environmental requirements.
As part of its sustainable development policy, the city of Castelnaudary developed a project limiting the impact on the environment, ensuring an adequate energy management and with particular attention to the environmental quality of the ZAC. Designed as an eco-district, combining efficiency of consumption, technical and energy requirements, densification and diversity prioritizing the relation to nature, to agricultural land and water.
The eco-district completes the existing urban fabric, in line with the sustainable development objectives of the municipality:
- Form and urban integration: limitation of heights, reduced car use, presence of bike paths, pedestrian paths, proximity of public transport.
- Mixity: The units will be individual, grouped and collective individual and a quarter of them will be in social housing.
- Water: rainwater recovery, consumption control equipment, welcomes booklets for future occupants.
- Biodiversity conservation of woodlands.
- Orientation bioclimatic: living rooms oriented to south.
- Energy: low consumption building and solar thermal hot water.
- Waste: pre-sorting and composting spaces.
- Materials: local, natural, certified.
- Controlled costs.
Land plot area