Abstract: A masonry wall includes a masonry foundation, a flashing unit disposed on the masonry foundation, a masonry weep structure, a mortar bed and at least one layer of masonry units disposed upon the mortar bed. A gap defined between the back surface of the masonry unit and the back edge is sufficient to allow water that has seeped through a plurality of masonry units to downwardly toward the platform. A mesh masonry weep structure is disposed on the platform of the flashing unit to allow drainage of water that has seeped behind the wall. A modular flashing unit and template system facilitates building a masonry foundation and quick application of flashing.