
Located at the intersection of Calle Pau Claris 81 and Casp 26, in the heart of Barcelona's Eixample district, the Casal Sant Jordi (Casa Tecla Sala) is one of the earliest examples of rationalist architecture in the city. Designed by Francesc Folguera Grassi between 1929 and 1931, this protected building, listed as a BCIL (Local Cultural Asset), has undergone a comprehensive renovation aimed at restoring its architectural value and adapting it to contemporary standards of comfort, accessibility, technology, and efficiency.




In 2023, Rex Spain ZDHL (Zurich Group) commissioned FLULLE to carry out the comprehensive renovation of the building, with particular attention to the conservation and restoration of protected elements in accordance with the heritage criteria established by the city of Barcelona. The architectural project was developed by Addenda Architects, and the building will house the Barcelona headquarters of IES Abroad.
With a floor area of 6,866.60 m² and 11 floors, the project has transformed a building of significant historical value into a fully modernized office and service space, capable of combining heritage, innovation, and new uses.




The project required a highly complex technical rehabilitation of a historic building with protected architectural, artistic, and decorative elements. The challenge was to adapt the building to current requirements for operation, accessibility, safety, and facilities, without losing the original identity of this unique asset within Barcelona's heritage.




The scope of work undertaken by FLULLE included a comprehensive intervention on the structure, building envelope, interior spaces, finishes, and installations. Among the most significant tasks were the construction of special foundations using micropiles, the building of new metal structures to create unique spaces such as the auditorium, the structural reinforcement of existing elements, and the execution of selective and controlled demolitions.
The project also included the construction of reinforced concrete structural cores for new elevator shafts, resulting from the relocation of three elevators, along with the rehabilitation of two historic elevators preserved for their heritage value. In addition, the vertical circulation cores were redistributed, a key element in ensuring universal accessibility and proper connectivity between floors.
The intervention also incorporated actions on structural and facade pathologies, waterproofing treatments of roofs, as well as an important restoration and heritage recovery work: protected furniture, works of art such as frescoes, mosaics and sculptures, false ceilings, wooden joinery, historic stained glass, original parquet and marble floors, and the monumental marble staircases.




In the common areas, original materials were restored, and deteriorated areas were replaced with materials of equivalent quality. In newly renovated areas, high-quality finishes were applied using ceramic tiles, hydraulic paving, natural stone, and wood. In the office floors, raised access flooring and suspended ceiling systems were installed, in accordance with the building's new functional requirements.
Exterior windows and doors were replaced with new oak units, respecting the original geometry and aesthetic, and incorporating double glazing to improve the building's performance. On the ground floor, a reception desk with access control and security was installed, and on the terrace, the gardens, fountains, and water feature in the protected area were restored.






The project included the complete installation of electrical systems, HVAC, fire protection, plumbing, telecommunications, and a building management system (BMS), as well as the corresponding installations for private areas. The building features a hybrid VRF air conditioning system with heat recovery, combined with passive bioclimatic strategies; a uniform lighting system with DALI control on the facades; video surveillance and access control using cameras and occupancy sensors; and a 90 m³ fire water tank.


The result is a building that recovers its historical and architectural significance, yet is fully prepared to meet the current needs of offices and services. The intervention has preserved the building's heritage value while incorporating new structural, technological, and functional solutions, resulting in a unique asset in one of the most prestigious locations in the heart of Barcelona.
Thanks to rigorous and meticulous execution at every stage of the project, the building has achieved the necessary standards to obtain LEED Gold and WELL Silver certifications.
Casa Tecla Sala thus stands as an example of how comprehensive rehabilitation can enhance the value of built heritage, combining restoration, technical precision, and adaptation to new uses with a contemporary vision.





At FLULLE we are very proud to have been part of this long transformation project in the heart of Barcelona, a project with many challenges and after much work, we are reaping the rewards of things done well.
