A chimney is the simplest-looking structure on a house and one of the more demanding to build: it must carry its own considerable weight, contain fire, shed water, and stand plumb for generations, on soil that moves for a living. The build sequence exists to satisfy all four masters. Stage by stage:
Stage 1: the footing (where projects succeed or fail)
Masonry’s weight, many tons on a two-story stack, demands a reinforced concrete footing sized to the load and, in North Texas, engineered for expansive clay: proper depth, sometimes piers, always drainage thinking. Every leaning chimney we assess is a footing story told decades later. This stage is invisible in the finished product and determines its entire future.
Stage 2: the core rises
Structural masonry (block or solid brick) climbs course by course with clay flue tiles set inside, each tile joint mortared with refractory cement, maintaining the code-required airspace and wall thicknesses. Plumb is checked obsessively; a lean built in at story one is unfixable at story two.
Stage 3: the fire end
The firebox forms in firebrick with its splayed sides and tilted back (reflecting heat roomward), the throat and damper set above it, and the smoke chamber corbels inward, parged smooth per modern standard, to meet the first flue tile. This geometry is where draft is born; craftsmanship here decides whether the fireplace smokes politely or into the den.
Stage 4: the face
Exterior finish brick or stone rises around the core, the visible chimney, with weep provisions, wall ties, and the finish coursing that makes it architecture rather than infrastructure.