The San Lázaro neighbourhood, located in the north area of Mérida (Badajoz), has grouped housing blocks, which are accessed through a community patio. All the blocks have two floors and two houses per floor. There are a total of five buildings with five blocks and 20 houses, and one building with four blocks and 16 houses.
The building selected for the rehabilitation project has four blocks of flats, which are accessed from an inner courtyard, common to all of them. Each block has two floors and two houses per floor, so it has a total of 4 houses. The building complex reaches 16 homes.
The houses have a living-dining room, kitchen, three bedrooms and a bathroom. Its façade is built by two sheets of brick with insulation between them, and finished with exposed brick. The exterior carpentry is made of aluminium profiles without thermal break and simple 5 mm glass. The building is in poor condition.
The rehabilitation project proposes to act only on the building envelope, without affecting the structure or the distribution of the interior spaces.
a) Façade. On the one hand, the project will improve the thermal conditions of the façade by implementing an Exterior Thermal Insulation System made of cork, with a lime mortar finish. Some areas near the window openings will keep the cork insulation visible.
b) Roof. The project will also reinforce the insulation of the building's roof, by replacing a recycled cellulose insufflation.
c) Sanitary slab. To improve the thermal conditions of the building, in addition to the above measures, cork insulation will be provided under the sanitary slab.
d) Carpentry. Finally, the project will replace the current carpentry. The aluminium frames without thermal break and simple glass will be removed and other wooden frames and double glazing will be placed.