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Energy efficient retrofitting of a 1950-ies multi-dwelling block house considering hygrothermal properties – field measurements and simulation

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Author

  • Carl-Magnus Capener
  • Kenneth Sandin
  • Miklos Molnar
  • Johan Jönsson

Summary, in English

Elevated moisture contents due to exposed weather conditions and ageing façade materials can often lead to degradation and increased risks for the building walls, but also affect the insulating properties of the materials, as thermal and hygric behaviour of building materials are closely interconnected. This paper presents the first results from a study of a 1950-ies multi-family building with a previous history of high moisture levels in it walls and subsequent indoor related moisture problems. The study includes an on-site field measurement programme with continuous monitoring of hygrothermal conditions throughout selected walls, as well as indoor conditions of tenants apartments, pre- and post-retrofit. The results from the conducted field study are compared to calculated transient hygrothermal simulations and the thermal properties of the building component, and their impact on heat losses are evaluated. The results show that the chosen ETIC-system had a favourable effect on the moisture content of the walls and facilitates a quick drying of the accumulated moisture in accordance with the simulated results. It is also shown that the thermal performance increases as the walls dry out in addition to the increase by the extra insulation, and the hygrothermal properties of the retrofitted walls depending on choice of ETIC-system are also investigated.

Publishing year

2012

Language

English

Pages

201-208

Publication/Series

Proceedings of the 5th International Building Physics Conference, 5th IBPC

Document type

Conference paper

Topic

  • Building Technologies

Keywords

  • energy efficiency
  • retrofitting
  • hygrothermal
  • ETICS
  • transient simulations
  • field measurements
  • AAC

Conference name

5th International Building Physics Conference

Conference date

2012-05-28 - 2012-05-31

Conference place

Kyoto, Japan

Status

Published