Bosco Verticale (Vertical Forest) is a pair of residential towers in the Porta Nuova district of Milan, Italy, between Via Gaetano de Castillia and Via Federico Confalonieri near Milano Porta Garibaldi railway station. They have a height of 110 metres (360 ft) and 76 metres (249 ft) and will host more than 900 trees (approximately 550 and 350 trees in the first and second towers respectively) on 8,900 square metres (96,000 sq ft) of terraces. Within the complex is also an 11-story office building; its facade does not host plants.
The towers were designed by Boeri Studio (Stefano Boeri, Gianandrea Barreca and Giovanni La Varra). It also involved input from horticulturalists and botanists.
The building was inaugurated in October 2014.
The project was designed as part of the rehabilitation of the historic district of Milan between Via De Castillia and Confalonieri. It consists of two residential towers of which the largest is 26 floors and 110 meters high (called Torre E) and the smaller tower is 18 floors and 76 meters high (called Torre D). It contains 400 condominium units priced from 3,000 – 12,000 Euro per square metre.
It is called Bosco Verticale because each tower houses trees between three and six meters which help mitigate smog and produce oxygen. It is also used to moderate temperatures in the building in the winter and summer. The plants also attenuate noise. The design was tested in a wind tunnel to ensure the trees would not topple from gusts of wind. Botanists and horticulturalists were consulted by the engineering team to ensure that the structure could bear the load imposed by the plants. The steel-reinforced concrete balconies are designed to be 28 cm thick, with 1.30 metre parapets.
The construction of the towers began in late 2009 and early 2010, involving 6,000 onsite construction workers. Between mid-2010 and early 2011 construction progressed very slowly and the towers rose by only five floors while the core rose to the seventh floor. Construction progressed throughout 2011, and by the beginning of 2012 the structures were completed, and construction of the facades and installation of the plants began on 13 June 2012. The building was inaugurated in October 2014.
On April 11, 2012, one of the buildings was used as a temporary art gallery and opened to the public for an art exhibition hosted during Milan Fashion Week.
The two buildings have 730 trees (480 large, 250 small), 5,000 shrubs, and 11,000 perennials and groundcover on its facades. The original design had specified 1,280 tall plants and 920 short plants encompassing 50 species. Overall, the vegetation is the equivalent of that found in a one hectare woodlot. The innovative use of heat-pump technology is helping to slash heating and cooling costs.
On November 19, 2014, Bosco Verticale won the International Highrise Award, prestigious international competition bestowed every two years, honouring excellence in recently constructed buildings that stand a minimum of 100 meters (328 feet) tall. The five finalists were selected from 26 nominees in 17 countries.
On the 12th of November 2015, the Council on Tall Buildings and Urban Habitat (CTBUH) Awards Jury selected Bosco Verticale, Milan, as the overall “2015 Best Tall Building Worldwide” at the 14th Annual CTBUH International Best Tall Building Awards Symposium, Ceremony & Dinner, celebrated at the Illinois Institute of Technology, Chicago.
Gardeners rappel down ropes