There is often an air gap among the brick veneer as well as structural wall. As clay-primarily based brick is normally not wholly water-resistant, the structural wall will typically Have a very water-resistant surface area (normally tar paper) and weep holes is often still left at the base on https://www.bbb.org/us/ca/anaheim/profile/patios-and-decks/west-hills-masonry-inc-1126-172019121