BS EN 12524:2000 – Building materials and products Ð Hygrothermal properties Ð Tabulated design values

1 Scope
This standard gives design data in tabular form for heat and moisture transfer calculations, for thermally homogeneous materials and products commonly used in building construction. It also gives data to enable the calculation and conversion of design thermal values for various environmental conditions.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN ISO 7345, Thermal insulation – Physical quantities and definitions (ISO 7345:1987).
EN ISO 9346, Thermal insulation – Mass transfer – Physical quantities and definitions (ISO 9346:1987).
EN ISO 10456, Thermal insulation – Building materials and products – Determination of declared and design thermal values (ISO 10456:1999).
3 3.1 Definitions, symbols and units Definitions For the purposes of this standard, the terms and definitions given in EN ISO 7345, EN ISO 9346 and the following apply.
3.1.1 declared thermal value expected value of a thermal property of a building material or product assessed from measured data at reference conditions of temperature and humidity – given for a stated fraction and confidence level corresponding to a reasonable expected service lifetime under normal conditions [EN ISO 10456]
3.1.2 design thermal value value of thermal property of a building material or product under specific external and internal conditions which may be considered as typical of the performance of that material or product when incorporated in a building component [EN ISO 10456]
4 Design thermal values
4.1 General
Design thermal walues for building materials are used in heat and moisture transfer calculations.
Design thermal values can be derived from declared thermal values by applying the conversion procedures in EN ISO 10456. This is normally the case for thermal insulation materials. The method of determination of the declared thermal value for an insulation material is specified in product standards. Design thermal values for masonry materials are usually derived from the thermal conductivity in the dry state using EN ISO 10456.
NOTE The thermal conductivity in the dry state for masonry materials is given in prEN 1745:1994, Masonry and masonry products – Methods for determining design thermal values.
4.2 Tabulated design thermal values
Table 1 gives design thermal values for materials in general in building applications. When appropriate, linear interpolation may be used.
BS EN 12524:2000 – Building materials and products Ð Hygrothermal properties Ð Tabulated design values