What are weepholes formed by omitting mortar from the joints and filling the cavity with pea gravel called?

Weepholes refer to small openings that are intentionally created in masonry walls to allow water that accumulates within the wall cavity to drain out. The process involves omitting mortar from specific joints and filling the cavity with pea gravel, which facilitates drainage while still maintaining structural integrity. This design prevents water from pooling inside the wall, thus reducing the risk of damage caused by moisture, mold, or structural weakening.

The term "weepholes" is specifically used to describe these drainage points, which are essential in maintaining the health of masonry constructions exposed to environmental moisture. This option accurately captures the function and method used to create these critical features in construction.

The other choices relate to different concepts. Drainage holes are general terms that might refer to any opening designed to allow water to drain, but they do not specifically describe the function of weepholes in masonry. Ventilation holes are intended to allow air circulation, which is a different function altogether, facilitating airflow rather than drainage. Expansion joints are structural components that allow for movement and prevent cracking in materials due to thermal expansion; they do not serve the purpose of allowing water to escape. Therefore, referring to the openings that facilitate water drainage specifically as weepholes is both accurate and precise.