Water diverting building block

DETAILED DESCRIPTION It is therefore an object of the present invention to overcome the deficiencies in the prior art concrete blocks and to provide a block which prevents the migration of water to the interior thereof.
Specifically, the invention provides a hollow building block, for use in constructing a longitudinal vertically stacked array of like blocks, the block comprising: first and second spaced longitudinal walls extending parallel to one another and each having an interior face directed toward one another and an exterior face directed away from one another; at least one web extending between the longitudinal walls and having oppositely directed lateral faces extending transverse to the interior faces of the walls; the lateral faces being interconnected at opposite edges by respective first and second lateral surfaces, at least one of the lateral surfaces having a recess formed therein; the recess being asymmetric, extending substantially over the length of the web and being defined by a pair of oppositely inclined surfaces which promote the movement of water there along.