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Analysis of the Lourdes Renove rehabilitation project in Tudela.
It is an example of energy rehabilitation of a complete neighborhood in the Navarrese town of Tudela, and that is framed within the ECO-CITY European Project, in the CONCERTO program, an initiative of the European Union that aims to reduce CO2 emissions by improving energy efficiency and installing renewable energies in which 44 European cities from 18 different countries participate.
It includes the rehabilitation of a total of 10 blocks with a total of 146 affected homes and the comprehensive renovation of the heating installation of 31 buildings (486 homes) in the San Juan Bautista district. It should be noted that the houses in this neighborhood correspond to social housing built between the 50s and 70s.
From the perspective of energy efficiency, These were buildings that had a poor thermal envelope with very basic construction systems, without any thermal insulation, certain interventions or self-construction processes having been carried out continuously, and in the case of the facilities these were quite inefficient, therefore deficient in energy efficiency in all the buildings considered, with high energy demands and very low performance in its thermal installations. It should also be noted that initially they presented important problems in the accessibility aspect that were corrected in the action.
Scope of action of the rehabilitation:
Initially, three areas of the neighborhood were chosen, which included the four types of buildings that corresponded to the oldest social collective housing in that neighborhood. The interventions that were established within this area were the following:
- Pilot Architecture Projects for the 4 selected building typologies: Blocks from the 50s, The 100 Floors, Blocks from the 60-70s and the Towers.
- Redevelopment Project of part of the Lourdes Renove Project Scope.
- Comprehensive Renovation of the Heating of Barrio San Juan Bautista.
Within them, the rehabilitation of the common areas of the buildings as well as the homes of various blocks of flats and improvement of the facilities in other cases was contemplated, so that they can be specified in the following interventions:
- Improvement of the thermal envelope: Facades, seen dividing walls, roofs and ground floors.
- Elimination of Architectural Barriers.
- Renovation of the General Heating Installations up to each home.
- Incorporation of Renewable Energies.
- Monitoring of results.
Solutions to improve the thermal envelope:
In the blocks, thermal insulation systems were used on the outside or SATE, using 60 mm graphite EPS plates, finished with a flexible stucco, both for the exterior facades and for those of interior patios and visible party walls. Insulation was also placed under the slab of the ground floor houses using 100 mm mineral wool. thick and 60 mm extruded polystyrene cover. of thickness.
On the ground floors, a reinforcement has been made with a Coteterm-type vandal-proof mortar, with a reinforcing mesh. It is worth mentioning that one of the requirements demanded in the proposal by the Concerto program, required that the thermal envelopes must exceed the requirements of the Technical Code in its Basic Document on Energy Saving (DB-HE).
The ground floor houses were insulated with a 60 mm thick heat-insulating mortar from the Weber house.
Double windows were placed in the façade holes, duplicating the exterior carpentry by means of sliding windows and using low-emissivity glass of the Guardian Sun type and thickness 4/8/6.
Lattice closings were arranged to reduce excess solar radiation in summer and to be able to hide the new route through which the facilities run, as well as the air conditioning machines and clotheslines.
Accessibility:
Regarding accessibility, the actions were carried out and the necessary measures were adopted so that the works could be carried out in such a way that during the period of the works their owners did not have to leave the homes.
Solutions to improve heating installations:
This action focuses on improving the installation of centralized heating in the San Juan neighborhood
Baptist. These are facilities that have the same age as the buildings, built between the 60s and 70s and in poor condition, so that two essential objectives were sought:
- Enable the survival of these facilities that were near the end of their useful life, through such comprehensive renovation and the inclusion of renewable energy through biomass.
- Allow facilities to work efficiently, improve their performance and at the same time incorporate renewable energy.
Project conclusions:
This project puts on the table that; Both the measures to improve the envelope and the renovation of heating in buildings from the 60s to the 70s is possible and the results can also be extended to apply them to other buildings that were built at that time. The project thus manifests it by indicating the transferability of the action measures not only to other Areas of the Lourdes or Tudela neighborhood, but to other towns in Navarra that have neighborhoods executed throughout the 50-60s and 70s.
It is also important to add that the study contemplated that the buildings already rehabilitated should incorporate monitoring facilities that would allow the information regarding their energy consumption to be recorded in the minimum period of one year, as required by the aforementioned European Concerto Program.
