- architect Alvar Aalto
- real estate owner Deka Immobilien GmbH (since 9.6.2008)
- buiding works completed in 1961
- original facade cladding was made of Carrara Bianco marble
- original facade in very bad condition due to deterioration of marble
- facade renovation was carried out during 2007-2008
- original marble was replaced by Branco Estremoz marble
- owner during the renovation project: Stora Enso Oyj
- project management and supervision: Stonecon Oy
- stone technology consulting: Stonecon Oy
- architect: Evata Finland Oy
- structural engineering: Insinööritoimisto Konstru Oy
- stone contractor: Pohjolan Kiviasennus Oy
- preservation of Alvar Aalto cultural heritage was taken into account throughout the project
- due to the central and important location no changes in appearance were desired
- due to ongoing redesign process of the city plan construction activities were prohibited
- process for choosing the new facade material was very complicated
- goal was to find a natural stone material with better durability than the original
- Stora Enso planned to replace marble with light granite, but permission was denied
- most challenging part of the project was quality control during marble production
- original stone fixings could be utilised because they were generally in good condition
- original thermal insulation made of cork, was preserved
- copper roofing, terrace structures and metal details in the facade were also renewed
- during facade renovation also wooden (teac) window frames were renovated
- during renovation works the building was normally in use
- area of facade cladding was 2500 m2