ISO 13788:2012

Hygrothermal performance of building components and building elements — Internal surface temperature to avoid critical surface humidity and interstitial condensation — Calculation methods

Publication date:   Dec 14, 2012

General information

90.93 Standard confirmed   Sep 25, 2023

ISO

ISO/TC 163/SC 2 Calculation methods

International Standard

91.060.01   Elements of buildings in general | 91.120.10   Thermal insulation of buildings

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Scope

ISO 13788:2012 gives simplified calculation methods for:

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.
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 with 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.
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.


Life cycle

PREVIOUSLY

WITHDRAWN
ISO 13788:2001

NOW

PUBLISHED
ISO 13788:2012
90.93 Standard confirmed
Sep 25, 2023