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I. Kovacic, M. Summer, C. Achammer:
"Life-cycle oriented renovation Strategies for Social Housing Stock";
Vortrag: 11. OTMC Conference, Dubrovnik; 28.09.2013 - 30.09.2013; in: "Proceedings of 11. OTMC Conference", V. Mlinaric, I. Burcar Dunovic, I. Zavrski (Hrg.); University of Zagreb/ Croatian Association for Project Management, Zagreb (2013), ISBN: 978-953-7686-04-8; 15 S.

The specific stock of Red Vienna - a protected historic monument, counts 65.000 social housing units, in 382 buildings. These are marked with an insufficient state of repair and a dwelling supply, which does not fit with modern demand considering the size of housing units or the challenges of ageing society. This paper presents life-cycle oriented refurbishment strategies, considering not only structural and thermal refurbishment variants, but also the socio-cultural aspects such as the needs of ageing society and the preservation of culturally important buildings.
In the first step, various façade-systems were evaluated in terms of life-cycle costs, ecologic and socio-cultural impact. The interior insulation based façade-system displayed the best properties in terms of economic, ecologic and socio-cultural properties, fulfilling the monument protection requirements to which the Red Vienna Stock obliges. In further step, building-hull refurbishment variants based on interior insulation, were developed and evaluated in terms economic (production cost) and ecologic (CO2 emissions) amortization.
The findings imply that the holistic refurbishment (complete building hull) performs the best in terms of heating energy demand reduction (improvement of 37%) and in annual CO2 emissions (improvement of 60%). Aside from the refurbishment, the greatest ecological impact has the heating system. Only through the change of gas to district heating energy supply the annual CO2 emissions can be reduced by 70%. Finally, the refurbishment strategy considering the social sustainability was developed, where the financing of refurbishment for assisted living is enabled from the surplus resulting from reduction of the need for institutional care, reinforcing the value of historic building stock as social capital.

Social Housing, Assisted Living, Refurbishment, Life Cycle Costs, Life Cycle Assessment