BS EN ISO 13788:2012:2013 Edition
$198.66
Hygrothermal performance of building components and building elements. Internal surface temperature to avoid critical surface humidity and interstitial condensation. Calculation methods
| Published By | Publication Date | Number of Pages |
| BSI | 2013 | 52 |
This International Standard gives simplified calculation methods for:
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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.
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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:
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the variation of material properties with moisture content;
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capillary suction and liquid moisture transfer within materials;
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air movement from within the building into the component through gaps or within air spaces;
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the hygroscopic moisture capacity of materials.
Consequently, the method is applicable only where the effects of these phenomena can be considered to be negligible.
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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.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | Foreword |
| 6 | Foreword |
| 7 | Introduction |
| 9 | Section sec_1 Section sec_2 Section sec_3 Section sec_3.1 1 Scope 2 Normative references 3 Terms and definitions, symbols and units 3.1 Terms and definitions |
| 11 | Section sec_3.2 3.2 Symbols and units |
| 12 | Section sec_3.3 Section sec_4 Section sec_4.1 Table tab_1 Section sec_4.2 Section sec_4.2.1 Section sec_4.2.2 3.3 Subscripts 4 Input data for the calculations 4.1 Material and product properties 4.2 External boundary conditions |
| 13 | Section sec_4.2.3 Section sec_4.2.4 Section sec_4.2.4.1 Section sec_4.2.4.2 |
| 14 | Section sec_4.3 Section sec_4.3.1 Section sec_4.3.2 Section sec_4.4 Section sec_4.4.1 Table tab_2 4.3 Internal boundary conditions 4.4 Surface resistances |
| 15 | Section sec_4.4.2 Section sec_5 Section sec_5.1 Section sec_5.2 Section sec_5.3 5 Calculation of surface temperature to avoid critical surface humidity 5.1 General 5.2 Determining parameters 5.3 Design for avoidance of mould growth, corrosion or other moisture damage |
| 16 | Section sec_5.4 5.4 Design for the limitation of surface condensation on low thermal inertia elements |
| 17 | Section sec_6 Section sec_6.1 Section sec_6.2 6 Calculation of interstitial condensation 6.1 General 6.2 Principle |
| 18 | Section sec_6.3 Section sec_6.4 Section sec_6.4.1 6.3 Limitation of sources of error 6.4 Calculation |
| 19 | Section sec_6.4.2 Section sec_6.4.3 |
| 20 | Section sec_6.4.4 Figure fig_1 Section sec_6.4.5 |
| 21 | Figure fig_2 Figure fig_3 Section sec_6.4.6 |
| 22 | Figure fig_4 Section sec_6.4.7 Figure fig_5 |
| 23 | Figure fig_6 Section sec_6.4.8 Figure fig_7 |
| 24 | Section sec_6.5 Section sec_7 Section sec_7.1 6.5 Criteria used to assess building components 7 Calculation of drying of building components 7.1 General |
| 25 | Section sec_7.2 Section sec_7.3 Section sec_7.4 7.2 Principle 7.3 Specification of the method 7.4 Criteria used to assess drying potential of building components |
| 26 | Annex sec_A Annex sec_A.1 Table tab_c Figure fig_A.1 Annex A (informative) Internal boundary conditions |
| 27 | Annex sec_A.2 Table tab_A.1 Table tab_d Figure fig_A.2 |
| 28 | Annex sec_B Annex sec_B.1 Table tab_B.1 Annex B (informative) Examples of calculation of the temperature factor at the internal surface to avoid critical surface humidity |
| 29 | Annex sec_B.2 Table tab_B.2 Annex sec_B.3 |
| 30 | Table tab_B.3 Annex sec_B.4 |
| 31 | Table tab_B.4 |
| 32 | Annex sec_C Annex sec_C.1 Table tab_C.1 Annex sec_C.2 Annex C (informative) Examples of calculation of interstitial condensation |
| 33 | Table tab_e Figure fig_C.1 Table tab_C.2 |
| 34 | Table tab_C.3 Annex sec_C.3 |
| 35 | Table tab_f Figure fig_C.2 Table tab_C.4 |
| 36 | Table tab_C.5 Annex sec_C.4 |
| 37 | Table tab_g Figure fig_C.3 Table tab_C.6 Annex sec_C.5 |
| 38 | Table tab_h Figure fig_C.4 Table tab_C.7 |
| 39 | Table tab_C.8 Table tab_C.9 Annex sec_C.6 |
| 40 | Table tab_C.10 Table tab_i Figure fig_C.5 |
| 41 | Table tab_C.11 Table tab_C.12 |
| 42 | Annex sec_D Table tab_j Figure fig_D.1 Annex D (informative) Example of the calculation of the drying of a wetted layer |
| 43 | Table tab_D.1 Table tab_D.2 |
| 44 | Table tab_k Figure fig_D.2 |
| 45 | Annex sec_E Annex sec_E.1 Annex E (informative) Relationships governing moisture transfer and water vapour pressure |
| 46 | Table tab_E.1 Annex sec_E.2 |
| 48 | Reference ref_1 Reference ref_2 Reference ref_3 Reference ref_4 Reference ref_5 Reference ref_6 Reference ref_7 Bibliography Bibliography |
