Cavity Wall
Cavity walls consist of two 'skins' separated by a hollow space (cavity). The skins are commonly masonry such as brick or concrete block. Masonry is an absorbent material, and therefore will slowly draw rainwater or even humidity into the wall. The cavity serves as a way to drain this water back out through weep holes at the base of the wall system or above windows. A cavity wall with masonry as both inner and outer skins is more commonly referred to as a double wythe masonry wall.
Read more about Cavity Wall: Introduction, Insulation, Specification, The Science of Cavity Insulation, History
Famous quotes containing the word wall:
“A man whose mind feels that it is captive would prefer to blind himself to the fact. But if he hates falsehood, he will not do so; and in that case he will have to suffer a lot. He will beat his head against the wall until he faints. He will come to again and look with terror at the wall, until one day he begins afresh to beat his head against it; and once again he will faint. And so on endlessly and without hope. One day he will wake up on the other side of the wall.”
—Simone Weil (1909–1943)