[ca] La població dels coneguts com a països desenvolupats es troba cada vegada més envellida per la baixa taxa de natalitat. Aquest envelliment, en els nuclis intermedis, representa una despoblació progressiva si no es realitza ninguna contribució. Per contra, si mirem les Grans Àrees Urbanes com la Regió Metropolitana de Barcelona veiem que s'espera un creixement poblacional degut a l'èxode rural que segueix vivint Catalunya. Esta creixent concentració de la població en les grans ciutats comporta un augment de la tensió del mercat de l'habitatge —i en l'actualitat, particularment, del lloguer— que ja es troba en una situació delicada. Dita situació demogràfica ens condueix a pensar en una forma de distribuir la població en un territori més ampli. Per altra banda, en el cas de Malgrat de Mar, observem que el casc antic, format per un teixit en base al parcel·lari de casa de cos —de front estret i gran profunditat— molt present en el Maresme, té gran quantitat d'habitatges de més de dos-cents metres quadrats, no accessibles i majoritàriament habitades per una, dues o tres persones. Per tant: ¿es pot utilitzar el tipus casa de cos per a abordar la regeneració i redensificació d'aquests cascs antics, fent-ho a més des d'una lògica energètica? El projecte indaga en la possibilitat de dotar d'un ventall variat d'habitatge assequible mentre s'intervé en el teixit degradat de Malgrat de Mar, donant açò lloc a tres casos d'estudi en els que es proposen diferents models de gestió —privada, pública i mixta— i graus d'intervenció —petita intervenció, obra nova i gran rehabilitació—. Aquestes tres escales d'actuació tenen com a denominador comú l'enfocament des de la perspectiva energètica, centrant-se en reduir la demanda generant espais intersticials de prolongació de l'habitatge.

[en] The population of the so-called developed countries is increasingly ageing due to the low birth rate. This ageing, in the intermediate towns, represents a progressive depopulation if no contribution is made. On the other hand, if we look at the Large Urban Areas such as the Barcelona Metropolitan Region, we can see that population growth is expected due to the rural exodus that Catalonia continues to experience. This growing concentration of the population in the large cities leads to an increase in tension in the housing market —and currently, particularly in the rental market— which is already in a delicate situation. This demographic scenario leads us to consider a way of distributing the population over a larger territory. On the other hand, in the case of Malgrat de Mar, we observe that the old town, formed by a fabric based on the "casa de cos" plots —with narrow fronts and great depth— very present in the Maresme, has a large number of houses of more than two hundred square metres, not accessible and mostly inhabited by one, two or three people. Therefore: can the "casa de cos" type be used to tackle the regeneration and redensification of these old quarters, and can it be done from an energetic logic? The project investigates the possibility of providing a varied range of affordable housing while intervening in the degraded area of Malgrat de Mar, giving rise to three case studies in which different models of management are proposed —private, public and mixed— and levels of intervention —minor intervention, new construction and major rehabilitation—. These three scales of action have as a common denominator the approach from the energetic perspective, focusing on reducing demand by generating interstitial spaces as extensions of the dwelling.