Renovation for the future An investigation of environmental impact and lifecycle costs from design choices during a renovation project
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Examensarbete för masterexamen
Master's Thesis
Master's Thesis
Modellbyggare
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Sammanfattning
Many of the buildings made in the 1960s to 1970s are today
in urgent need of renovation. To be able to reach the goal of
net-zero emissions by 2045 they are also in need of
improved energy efficiency. While decreased energy usage
after renovations leads to lower environmental impact, it
also leads to long-term lower costs. With selection of lasting
materials, it is also possible to lower the cost for
maintenance. By performing life cycle assessments (LCA)
and life cycle costs (LCC) on different design options of a
future renovation project, this thesis investigates the
interrelation between building costs and environmental
impact alongside architectural qualities.
The thesis focuses on the renovation of an apartment
building in Gärdsås in Gothenburg, where renovations have
been initiated on buildings of the same type. Data from the
already performed renovations will be used as reference for
further investigations on one of the buildings that is still to be
renovated. The previous renovations affected the facades
and outside areas, and the future renovations will be
including a pipe exchange and renovation of bathrooms.
These actions together with the façade renovation means
that the tenants must be relocated during the renovation and
more extensive renovations performed. This thesis aims to
present an alternative to this renovation where the design
choices are motivated by the result of the cost and
environmental assessments.
Previous studies show that there is currently a lack of
models to consider long term economical gain in public
renovation projects. Since public housing companies have a
larger responsibility to be socially sustainable, the balance
between economical gain and increased rents becomes
vital. Life cycle assessments show in a holistic way the
climate impact of a building over its lifetime and can be used
in an early design process to investigate different options.
By simultaneously investigating life cycle costs, this thesis
aims to motivate sustainable solutions with lower long-term
costs over a building’s lifetime. Additionally, the thesis aims
to provide a basis for further discussion on the responsibility
for renovation costs.