Hygrothermal analysis of masonry wall with wool glass interior insulation
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Kuupäev
2019
Kättesaadav alates
Autorid
Leiten, Kadri
Kirotar, Priit
Kiviste, Mihkel
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
When the external appearance of the building is fixed due to heritage requirements the
interior thermal insulation is the only possible solution for thermal upgrade of the building
envelope. Applying internal insulation to existing buildings is known to pose a challenge in
relation to hygrothermal risks, as this can lead to high relative humidity levels, condensation and
ultimately, mould growth and decay. The case study building is under historical preservation and
therefore this is not allowed to be insulated from outside. The paper describes the hygrothermal
assessment of applying internal glass wool insulation and vapour barrier in masonry wall with air
gap. In addition to the calculations the condition investigation was also performed. Data loggers
measuring temperature and RH were applied during the period of 31.01.2013–16.02.2013. The
conclusions were based to theoretical calculations (case study and DIN 4108-3) and practical
measurement results based on the data logger values obtained. The calculations showed that glass
wool and vapour barrier insulated system were in risk on condensation but the condensed water
dries out during summer time. Due to the fact that logger measurements were recorded during the
time when inside plastering was still in progress the relative humidity in the room was very high.
As a result of calculations it is possible to build this type of wall effectively, but in this case it
was not the most reliable way because of ongoing interior fitting.
Kirjeldus
Article
Märksõnad
interior insulation, hygrothermal performance, energy efficiency, articles