LEED v3 BD+C (Core & Shell) Gold
In Piazza Cordusio, one of the most important junctions of Milan's monumental centre located between Piazza Duomo and the main road leading to Castello Sforzesco, Park Associati is engaged in the refurbishment of the former Palazzo Sorgente.
The restyling results in the re-functionalisation of the entire building that houses offices on the upper floors; on the ground floor, first floor and basement the first Uniqlo megastore in Italy.
The refurbishment of the entire building - which dates back to the beginning of the 1900s, and was designed by Francesco Bellorini and Ippolito de Strani - attempts to establish a balanced dialogue between the neo-Renaissance eclecticism of the existing structure and a renewed relationship with the contemporary.
The creation of the two elements that characterise the project - an added storey and the covering of the inner courtyard - have been possible by moving and expanding surfaces and volumes, in exchange for an energetic upgrading of the building.
The floors from the second to the sixth become office areas, with emphasis put on the large glass surfaces and the flexible divisible spaces that allow for multi-tenancy.
The roof on the sixth floor previously housed a platform that was mainly occupied by equipment and was covered by dark bulkheads visible from the square below. Most of the plants have now been transferred to the basement and to areas within the building, and the resulting space has been destined for new offices that will house 50 workstations. The opaque glass cover imparts lightness, an almost ethereal feeling, to the added storey, its surface reflecting changes of light throughout the day. The sections on the glass surface - plates of steel and fibre cement - recall those on the façade, thus making the added storey perfectly integrated with the building without giving the impression of wanting to imitate its features.
The creation of the inner courtyard's glass roof has helped redesign the Uniqlo spaces on the lower floors completely. The roof has in fact created complete continuity between the large retail areas, as well as providing a covered passageway of direct communication between the square and the neighbourhood behind it - from Piazza Affari to the Bank of Italy building -, where the large financial centres are located. The three floors making up the Uniqlo store will be given visual continuity through a staircase connecting them and an internal bridge located on the first floor.
The divisions that used to define spaces on all floors have been removed, thus creating a very flexible and bright uninterrupted ring that winds from the inner courtyard to the façade. Thanks to the ceilings’ height, the second floor is particularly striking, even though from the upper floors the view over Milan's historic heart is truly unique.
Following a philological restoration, the building's façade has been cleaned and painted in two warm tones of grey that make it more contemporary while emphasizing its original style.
Ventilation + Heat recovery
Solar water heating
Sustainable building materials
Low-emitting materials and finishes
The challenge faced during the energy redevelopment of a historic building such as Palazzo Cordusio is to design an improvement on the envelope, system and distribution layout without changing the architectural features of the building.
The energy redevelopment of a historic building such as Palazzo Cordusio involves facing the challenge of improving the envelope, mechanical and electrical systems and distribution layout without affecting the architectural features of the building.
The facade, structures and some internal partitions have been maintained, with the aim of reducing the amount of dumped building material and new construction material demand. The systems, which in the original building were placed in the roof, were replaced and moved into the basement. This choice involved a more efficient and less invasive mechanical system, on the other hand it allowed to free up space on the top floor, now occupied by workspaces.
The best use of the volume is also part of economic and environmental sustainability strategies: increasing the net surface area encourages the installation of new offices in already urbanized areas rather than affecting virgin lands.
The improvement of mechanical and electrical systems and the performance of the envelope led more than 20% primary energy reduction.
Two new rotary heat recovery have been installed in the office spaces to reuse the heat content of the indoor air.
161 sqm of photovoltaic panels in the roof contribute to the green energy supply with 23 MWh per year and a peak power of more than 23 KWp.
Twenty-two solar collectors with a total area of 50 square meters and three thermal storage with a total capacity of 3000 l, contribute to the heating more than 50% of domestic hot water. A computer control system allows tenants to monitor water and electricity consumption.
The use of light-toned coatings in the roof helps reduce the heat island effects.
The choice to use materials produced at no more than 800 km from the project site has reduced the ecological footprint given by the transport of building materials from the place of production to the construction site.
204.00 KW/m² (64.668 KBtu/ft²)
Annual carbon footprint:
84.00 KgCO2m² (904.168 KgCO2/ft²)
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Hines - Bayerische Versorgungskammer (BVK)
Filippo Pagliani , Michele Rossi , Marco Panzeri , Architecno Srl - Arch. Guido Roche
Building services engineer:
REAAS SpA - Arch. Silvia Lazzari
Green certification consultant:
Mistretta & Co. - Ing. Silvestre Mistretta
F&M Ingegneria SpA
Carron Cav. Angelo S.p.A. , Tagliabue SPA , Diesse Electra SPA , Maser Group Srl