ENV 13420:2000

Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
      3.1 Designs with low resistance to water vapour
             diffusion
      3.2 Designs with high resistance to water vapour
             diffusion
      3.3 Designs being sensitive to deformation
      3.4 Windows manufactured of different materials
      3.5 Orientation
      3.6 Wet spot
4 Principle of test
5 Test facility
6 Dimensions of the test specimens
7 Preparation for test
8 Test conditions
9 Test methods
10 Test sequence
11 Test report
Annex A (informative) Design principles
Annex B (informative) Survey of general design criteria where
                      tests are not necessary

This European Prestandard specifies the test methods for evaluating: the risks of decay of windows manufactured of different materials through increased moisture accumulation as a result of condensation or water vapour diffusion; the influence of deformation on basic performances of windows manufactured of different materials exposed to different climates between their external and internal faces. Three test methods are to be differentiated. They take into account different cases of loadings.