EN ISO 10456 : Building materials and products - Hygrothermal properties -Tabulated design values and procedures for determining declared and design thermal values (ISO 10456:2007)(+ AC:2009).

This document specifies methods for determining the declared and design thermal values of thermally homogeneous building materials and products, as well as procedures for converting values obtained under certain conditions into values applicable under other conditions. These procedures apply to relevant ambient temperatures between -30 °C and +60 °C. It also provides temperature- and moisture-related conversion coefficients valid for mean temperatures from 0 °C to 30 °C. Finally, it presents the tabulated design values required for calculating heat and moisture transfer in thermally homogeneous materials and products commonly used in construction.