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Standard 2013-05

DIN EN ISO 13788:2013-05

Hygrothermal performance of building components and building elements - Internal surface temperature to avoid critical surface humidity and interstitial condensation - Calculation methods (ISO 13788:2012); German version EN ISO 13788:2012

German title
Wärme- und feuchtetechnisches Verhalten von Bauteilen und Bauelementen - Raumseitige Oberflächentemperatur zur Vermeidung kritischer Oberflächenfeuchte und Tauwasserbildung im Bauteilinneren - Berechnungsverfahren (ISO 13788:2012); Deutsche Fassung EN ISO 13788:2012
Publication date
2013-05
Original language
German

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Publication date
2013-05
Original language
German
DOI
https://dx.doi.org/10.31030/1920694

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Overview

This standard gives simplified calculation methods for: a) the internal surface temperature of a building component or building element below which mould growth is likely, given the internal temperature and relative humidity - the method can also be used to assess the risk of other internal surface condensation problems. b) for the purpose of the assessment of the risk of interstitial condensation due to water vapour diffusion. The method used does not take account of a number of important physical phenomena including: the variation of material properties depending on moisture content; capillary suction and liquid moisture transfer within materials; air movement from within the building into the component through gaps or within air spaces; the hygroscopic moisture capacity of materials. Consequently, the method is applicable only where the effects of these phenomena can be considered to be negligible. c) the time taken for water, from any source, in a layer between two high vapour resistance layers to dry out and the risk of interstitial condensation occurring elsewhere in the component during the drying process. The committee responsible for this standard is NA 005-56-99 AA "Feuchte (SpA zu CEN/TC 89/WG 10, ISO/TC 163/SC 1/WG 8)" ("Moisture (national mirror committee for CEN/TC 89/WG 10, ISO/TC 163/SC 1/WG 8)") at DIN.

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DOI
https://dx.doi.org/10.31030/1920694
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