It is only recently that scientific studies have been undertaken to explain the mechanisms of rain penetration. Through better understanding of these mechanisms it should be possible to design and construct walls from which the problem is virtually eliminated.
National Research Council of Canada. Division of Building Research
Canadian Building Digest, no. CBD-40.
Garden, G. K. ‘Pénétration De La Pluie Et Moyens De l'Empêcher’. Conseil National De Recherches Du Canada. Division Des Recherches En Construction, December 1964. https://doi.org/10.4224/40001078.