Castellana 66
Context
The project is based on a clear vision: to transform an existing building into a benchmark of sustainability, energy efficiency, and contemporary design. The architectural concept is based on revaluing the built environment through solutions that not only enhance energy performance but also elevate the spatial and aesthetic quality of the property.
The project was conceived as an opportunity to rethink the building envelope, endowing it with a new visual and functional identity. The approach prioritised the harmonious integration of technology, comfort, and design, with a focus on the user experience and positive environmental impact.
Scope
At Aluman, we developed a new façade system for this emblematic office building in the heart of Madrid’s financial district, aiming to combine efficiency, aesthetics, and sustainability.
The project features an innovative and multifunctional façade, composed of:
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Operable glazed areas that enhance natural light and ventilation.
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Opaque sandwich panels that improve thermal and acoustic insulation.
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Dekton® ceramic panels by Cosentino, providing durability, resistance, and a contemporary image.
One of the most distinctive elements of the design is the integration of photovoltaic solar glass modules in vertical and horizontal louvers, which act as thermal sunshades while generating clean energy, contributing to the building’s energy self-sufficiency.
These solar glass panels, based on crystalline silicon technology, convert sunlight into electricity while providing thermal and daylight control. Their integration into the ventilated façade reduces the need for artificial heating and cooling, turning the envelope into an active source of renewable energy. The glass features an anthracite frit finish and extra-clear coating, creating a uniform texture that aligns with the modern architectural language of Madrid’s Paseo de la Castellana.
The façade is completed with triangular honeycomb-shaped geometries that project outward, adding a dynamic and distinctive identity to the building.
Challenge
The main challenge of the project was to carry out a comprehensive energy retrofit under a tight schedule and operational constraints, while ensuring minimal disruption to occupants.
Additionally, the project had to comply with the most demanding environmental standards, aimed at reducing energy consumption and greenhouse gas emissions.
At Aluman, we overcame these challenges through meticulous planning, precise execution, and the implementation of innovative and sustainable solutions, significantly improving the building’s energy efficiency without compromising its functionality or design.
Photos © Juan Francisco Gómez – www.juanfranciscogomez.es
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