Family houses

Sant Ferran, Formentera, Islas Baleares. Spain

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Life Reusing Posidonia, 14 social housing homes in Sant Ferran

Carles Oliver Barceló, Antonio Martín Procopio, Joaquín Moyá Costa, Alfonso Reina Ferragut, Maria Antònia Garcías Roig, arquitectos

FAD Awards finalist 2018  Architecture
Description Technical file

The Jury’s appraisal:The project proposes a social housing model of high architectural quality, taking advantage of the resources of its immediate surroundings to propose construction solutions. These dwellings, promoted by the public administration of the Balearic Islands, are an example of good architectural practice that incorporates sustainability criteria in a natural way to improve the habitability of the spaces and the lives of their inhabitants.

LIFE REUSING Posidonia is an Environmental Governance project undertaken by the Balearics Housing Institute (IBAVI) and the Directorate-General for Energy and Climate Change of the Balearic Islands, funded by the European LIFE + programme for nature conservation projects, since we do not inhabit a home, we inhabit an ecosystem. The goal is to provide the competent administrations with verified data for regulating the reduction of environmental impact in the construction industry.

The data were obtained while building and assessing a pilot building of 14 social housing homes, where formulas were tested for reducing a building’s environmental footprint, and their proper functioning was monitored with the collaboration of the University of the Balearic Islands (UIB). The improvement achieved consisted of reducing CO2 emissions by 63% during the building’s construction, by reducing energy use by 75% during the building’s lifetime, 60% reduction in water consumption and 50% in waste generation.

The building is energy class A. All homes have two bedrooms and a kitchen-living-dining room with a double prospect, providing crossed ventilation by orienting them towards the prevailing winds (N and E sea breeze) and installing large glazed windows and skylights equipped with solar protection to provide heat in winter.

The structure consists of load-bearing walls with non-reinforced lime mortar footings and laminated wooden forgings. Priority was given to the healthiest, most eco-friendly products possible that would be financially viable. Reusable local waste was employed, such as dry posidonia leaves for roof insulation or joinery using landfill waste.

The project links together heritage, architecture and climate change and demonstrates that the use of systems and materials from traditional architecture produces more than 60% savings in incorporated CO2 emissions during the construction of the building compared to a conventional building. In addition, it also demonstrates that more sustainable construction systems, in environmental, economic and social terms, are close to hand, are viable and are at risk of extinction: local artisan industries with eco-friendly production using locally sourced raw materials, which in the case of the Balearic Islands are the sandstone quarries, lime, ceramic fired with almond shells (biomass), reused wood or dried oceanic posidonia leaves. All these solutions constitute an ethnological heritage that we need to protect and also encourage their use as an alternative to imported materials.

The way the spaces and formal decisions were organised is the result of the knowledge of the materials’ benefits and limitations. Since they are natural, they are more fragile. This fragility here becomes a design opportunity.

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Localización Location: Sant Ferran, Formentera, Islas Baleares. Spain. Autores Authors: Carles Oliver Barceló, Antonio Martín Procopio, Joaquín Moyá Costa, Alfonso Reina Ferragut, Maria Antònia Garcías Roig, arquitectos del Instituto Balear de la Vivienda (IBAVI). Aparejador Quantity surveyor: Alberto Rubido, Xim Torrebella (presupuesto / control económico obra), José Luís Velilla Lon (dirección obra / coordinación SS). Ingeniería Enginnering: Miquel R. Oliver, Esteve Font | Estudis d'Enginyeria de les Illes. Estructuras Structures: Miguel R. Nevado. Colaboradores Collaborators: Mª del Mar Amengual, Nus, Miquel Ramon. Cálculo de CO2 Calculation of CO2: Carles Oliver, Alberto Rubido, Mª Antònia Simó (IBAVI), Joana Reus (DGECC). Consultoría ambiental Environmental consultancy: Societat Otgànica +10SCCL. Ensayos posidonia y monitorización edificio Posidonia trials and monitoring of the building: Joan Muñoz, Bartomeu Alorda, Cristian Carmona (UIB). Promotor Developer: Instituto Balear de la Vivienda (IBAVI). Directora Life 2013-2015 Life Director 2013-2015: Sandra Villamarín. Constructora General Contractor: Ferrovial Agroman. Fotografía Photography: José Hevia.
José Hevia