Understanding Humidity

Walls of Today and Water
Contrary to walls built in the past, contemporary walls are no more than 75 to 90mm in width, on average. As extended roofs, which protect the walls below, are less used in buildings (especially high-rise structures), the degree of exposure of larger surfaces to the elements is now far greater, and larger amounts of water running down the walls contribute to a higher volume of water penetration.

Other weak areas highly susceptible to water penetration include inadequately waterproofed rooftops, terraces, balconies, and expansion joints.

Part of the solution to Humidity related construction pathologies includes ensuring adequate water drainage, and limiting exposure of the wall to water. But most importantly, prevent the ability of penetration of any water that comes in contact with the wall.

(Adapted from Material hosted by A. Sebastian Engineering and Investigation Services and part of the Masonry resources and bibliography page)