calculation of structures, energy efficiency, rehabilitation and reform
The project has consisted of the complete rehabilitation of a house in Montcada i Reixac that had been abandoned for more than 20 years. In this rehabilitation, special attention has been paid to energy improvement and the use of natural materials.
The building has a wall structure and a tiled roof on a ceramic tile with reinforced ceramic beams built in the 1940s. As for the functional layout, it had problems such as the fact that the toilet was outside or that some rooms did not have direct ventilation outside.
Efforts have been made to achieve a clearer layout, with more openings in order to have light in all the rooms and a feeling of spaciousness despite the small size of the house. The auxiliary constructions that invaded the courtyard have been demolished, and the old kitchen has been turned into a porch that allows to gain a covered space of entrance to the house that serves as transition between the patio and the access and the housing. The original false reed ceilings have been demolished to gain height and have been used to build a small wooden loft that emerges as a privileged space in the house. The whole design process has been especially proactive with users by making virtual reality models.
To achieve an energy efficient building, 100mm cork has been insulated all over the inside of the walls, 160mm of XPS the roof for the outside and an insulated ventilated floor has been generated with 60mm of XPS on the floor. In this way, low energy demand has been achieved in winter and almost zero in summer.
The cork insulation has been plastered with raw earth by the users thanks to the collaboration of Martí Ferrer Fornells from the Orígens school who has guided this process of assisted self-construction.
As for the carpentry, all the interiors and those of the façade on Pine Wood Street (East) have been taken advantage of, improving their tightness and placing double glazing with low transmittance, the new ones as well. they have been installed with high performance wood.
In this way, it has been possible to rehabilitate a house using existing elements, from the most obvious ones such as walls and roof to doors, windows, the original marble sink, the laundry room ...; combining elements of conventional construction and bioconstruction techniques and natural materials such as wooden structures, earth plasters, natural cork insulation, with the active participation of users in almost all stages of the work and making it economically viable.
Photographs taken by Arbe.