A weep hole is a perforation in brick or masonry buildings in which trapped water can escape. Water accumulates in masonry and brick through flows in the facade, condensation and seepage from the ground up into the foundation. Weep holes serve to circulate air to those moist areas and to supply an outlet for water to escape.
Susan Newell Custom Home Builder, Inc..
The weep holes within this masonry-built house are observable under the windows. Walls are entered by water from rain, ground seepage and condensation. Weep holes both aerate the stonework and supply a way for trapped water to escape.
Many weep holes are open mortar joints, vertical slots built in such as a gap between the two bricks. For the most part, weep holes move undetected, and at times are thickly stuffed in with mortar with a well-meaning but inexperienced laborer.
Castro Design Studio
Weep holes are required by building code to be spaced no further apart than every 4 feet. With no weep holes, trapped water can cause extraordinary amounts of damage to the construction of the house. Walls can stain with seepage, metal fasteners can rust, wood can rust or become infested with wood-destroying insects, and the foundation, brick and mortar can deteriorate because of trapped moisture.
Workshop M Architecture
Weep holes are placed on top of the foundation wall but over the grade, large enough to maintain monsters from crawling in. Weep holes will also be required below windows, on very top of wall openings and at other important structural points in which water would pool or at which the masonry intersects with wood.