About 90% of the surface area of a masonry wall consists of concrete masonry units, with mortar
В joints making up the remaining. Both concrete and mortar are porous materials and, hence, can
permit the passage of water through them. Therefore, a water-repellent masonry system should
prevent the entry of water through both the concrete masonry units and the mortar joints.
This 1-hour interactive online course provides the details of achieving water-repellency and
efflorescence control in masonry construction. While the focus is on single-wythe masonry walls,
the admixture technologies presented are applicable to other manufactured concrete products
such as pavers and roof tiles.