Weep hole
Encyclopedia
Weep holes or "weeper holes" are small openings left in the outer wall of masonry
Masonry
Masonry is the building of structures from individual units laid in and bound together by mortar; the term masonry can also refer to the units themselves. The common materials of masonry construction are brick, stone, marble, granite, travertine, limestone; concrete block, glass block, stucco, and...

 construction as an outlet for water inside a building to move outside the wall and evaporate. The term was coined by archaeologist C. Leonard Woolley after finding evidence of weep holes in ziggurat
Ziggurat
Ziggurats were massive structures built in the ancient Mesopotamian valley and western Iranian plateau, having the form of a terraced step pyramid of successively receding stories or levels.Notable ziggurats include the Great Ziggurat of Ur near Nasiriyah, Iraq; the Ziggurat of Aqar Quf near...

s. Plastic "weeps" are used in modern masonry construction.

Weep holes are located near the base of masonry structures, particularly brick buildings. Raising the grade above weepholes may allow moisture, snakes, insects, and small animals to enter the building. Modern weep holes employ screens, constructed of flexible nylon or plastics.
Typically, drain tiles have weep holes, which allow water to enter the tile.
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