1 Scope
This British Standard gives recommendations for two methods for assessing exposure
of walls in buildings to wind-driven rain, namely the local spell index method and the local annual index method.
It should be noted that this code is not appropriate in respect of the weathertightness
of components such as windows. However, the performance of such components can be
influenced by the design of the surrounding structure and appendix E may be helpful in this respect.
NOTE. The titles of the publications referred to in this standard are listed on the inside back cover. Other references will be found throughout the text, indicated by bracketed numbers thus [1], and these are listed in the bibliography in appendix F.