The project includes the comprehensive rehabilitation of the thermal and structural envelope of an existing residential building, located at 16 Fuente de la Salud Street, in the Ensanche area of Donostia-San Sebastián. The building, constructed in 1920 and consisting of a ground floor and six floors above ground, presented construction and energy deficiencies detected in the Building Technical Inspection.

The intervention acts on exterior facades, recessed facades, light well, roofs, terraced roofs and ground floor slab, without altering the use or the load-bearing structure of the building. The main objective is improve the energy performance, airtightness and durability of the building envelope, as well as correcting existing pathologies related to dampness, cracks and detachments.

The project includes the installation of a External Thermal Insulation Composite System (ETICS) The project includes facades with varying thicknesses depending on the area, complete roof renovations using new insulation and waterproofing systems, and thermal insulation of the floor slab separating the ground floor from the apartments. It also includes replacing energy-inefficient windows and doors and upgrading safety features on balconies.

The intervention justifies compliance with Technical Building Code, in particular the basic documents relating to energy saving, health, safety of use and safety in case of fire, as well as the Municipal Energy Efficiency Ordinance of Donostia-San Sebastián.

The result is a building more energy efficient, comfortable and protected from the elements, extending their useful life and improving the living conditions of the homes, all through an intervention compatible with the existing architecture and the consolidated urban environment.