Cleavenger Masonry Inc on Woodside Avenue in Lakeside has held CSLB License #875239 (C-29 Masonry) since 1980, providing brick, block, and stone construction for commercial and residential projects across San Diego County. Block wall construction on commercial structures requires HVAC penetration coordination through CMU walls — a sequencing interface shared with Precision Temperature and other mechanical contractors on the same Woodside Avenue corridor. The firm holds membership in the Mason Contractors Association of California and the Masonry Contractors Association of America, and participates in the MITA apprenticeship program to train entry-level bricklayers. Chimney construction and parapet wall masonry on residential reroofing projects create a direct trade interface with Ford Roofing in Lakeside's Eucalyptus Hills area, where clay flue liner installation precedes flashing and cap sheet application. High-value scopes include structural CMU walls with #5 rebar grouted at 32 inches on center, natural stone veneer over metal lath and scratch coat, and chemical-resistant masonry lining for industrial containment structures.