Our Condensation Assessments estimate the interstitial condensation risk with the Glaser Method (based on ISO 13788). ISO 13788 is a standard static interstitial moisture calculation used to assess the amount of water vapour likely to be generated within the building and the resultant increase in internal vapour pressure above that of external air. This simplified representation of condensation risk is based on average monthly temperatures, vapour pressure and steady-state conduction of heat to determine if critical condensation points are reached within one year.
Condensation Assessments are required in some building types by the National Construction Code and New Zealand Construction Code. ISO 13788 does not meet these requirements and is a proxy for condensation risk.
To undertake Condensation Assessment, select ‘Condensation’ in the results area and click ’Run 1 Calculation’. Once complete, condensation and relative humidity are presented for one year. Further detailed results are available under 'View Results'.
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