engleski

Energy-Efficiency Upgrades: Residential Buildings from the Period up to 1940 in Zagreb

The refurbishment, conversion or upgrading of existing buildings always involves energy- efficiency issues. Upgrading a building to improve its energy efficiency requires careful consideration if works are to be effective, economical and avoid damaging the historic character of the building. Differences in applying energy-efficient measures result from the level of building conservation and the building condition. The basic subject of this research is the existing housing stock presented through residential buildings in the central part of Zagreb from the period prior to 1940. The year of construction of a building (1870-1940) provides a general idea about the method of construction and the materials that were used, and these are the factors influencing the building's energy performance. Most frequently, they are two and three-storey buildings of massive brick walls without thermal insulation and small openings, with unheated basements and attics, with vaulted and wooden ceilings and with gable roofs. The street facades are rendered with ornamentation. The research shall analyse energy performance of buildings of this period and demonstrate energy-efficiency upgrade measures in terms of their constructional details and energy performance benefits. This paper will show, through a variety of case studies, the importance for integrated approach balancing between energy efficiency and protection requirements. The concepts range from a simple energy-efficiency improvement for a building envelope to more complex and expensive methods such as extensions and demolition work. Possible constructional measures include improving the thermal insulation, renewing the windows, eliminating thermal bridges or decreasing the solar heat gains by providing sunshades. For buildings protected by conservation orders, it is clear that only non- intrusive upgrading can ensure that a traditional building has the potential to the long-term viability.

Existing Building ; Residential Building ; Building Envelope ; Energy-Efficiency Upgrades ; 1870-1940 ; Zagreb

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