The pilot building in Oulu, Finland, is one of five student apartment buildings and one building with communal facilities in a housing coorporation. The building was completed in 1985 according to a Finnish industrialized building system developed in the 1970's using prefabricated concrete units for residential buildings, called the "BES system". The building is in need of a complete refurbishment and the student flats are unmodern and lacking in facilities.


Retrofit concept

The building renovation includes a comprehensive refurbishment of indoor spaces and a façade renovation with the TES method (http://www.tesenergyfacade.com/)  utilizing timber based, prefabricated elements for the renewal of the building envelope. The refurbishment is aiming for the energy efficiency level of a passive house according to Finnish standards. The building owner will evaluate the results of the demonstration project, with a view towards the modernisation of the other 4 apartment buildings with the same technique.



 The Oulu demonstration before retrofitting and after. 

Brief facts

Year of construction: 1985

Property type: Two-storey building

No. of dwellings: 8

Project owner: PSOAS (Pohjois-Suomen oppilasasuntolat Oy), public student housing company

Energy (heat) demand befor retrofit: 148 kWh/m²y

Estimated energy demand after retrofit: 30 kWh/m²y

Construction works: August 2012 - February 2013

Participating E2ReBuild partners: Aalto University, PSOAS, NCCFI

Demonstration leader: Simon le Roux, Aalto University, simon.le.roux@aalto.fi


Construction under way

(December 2012)
The retrofit is expected to take 6 months and be finished in February 2013. The building has 8 apartments, and was originally built in 1984. The retrofit is bringing this building up to and above current new build standards. M3 Architects have designed a comprehensive refurbishment targeted for student family tenants, and a fresh new image for the housing which will be applied to 5 identical buildings around a shared yard.


Construction finished in Oulu!

(February 2013)

The construction work on the E2ReBuild demonstration building in Oulu, Finland is now finished and tenants can move in to the completely renovated house.



National seminar

(March 2014)

On 10 March 2014 Aalto University School of Arts, Design and Architecture, Department of Architecture arranged a national seminar titled E2ReBuild Oulu demo. The seminar addressed an audience of 51 Architectural professionals, and research in timber construction and sustainable housing design including visitors from Hokkaido University, Japan.

Presentation >>

Participants >>
Poster >>


E2ReBuild – Industrialised energy efficient retrofitting of residential buildings in cold climates. Contact info@e2rebuild.eu