Chimney Sweeping in Downey, CA

Chimney Sweeping for Downey Homeowners

Downey built out around work. The Spanish Colonial and Mediterranean houses near the old downtown date from the 1920s and 1930s, and then the city filled in hard through the 1950s and 1960s to house the Rockwell and North American Aviation workforce that built the Apollo command module here. That means the bulk of Downey chimneys are sixty to seventy years old, single-flue, terracotta-lined masonry serving a fireplace that was a design feature of the ranch house rather than a heating appliance. They have been used lightly and maintained rarely, which is the profile that produces the surprises. What we find most often in the postwar tracts is crown failure: a thin trowelled mortar wash across the top with no overhang, cracked through decades ago, quietly feeding water into the stack ever since. The rusted damper underneath is usually the first symptom the homeowner notices. In the older Spanish houses nearer downtown the issue is more often the firebox itself, where original firebrick has spalled and the joints have opened.

1950s-60s aerospace-era ranch tracts with failed mortar crowns, and 1920s Spanish houses with spalled original fireboxes.

Almost nobody in Los Angeles County heats with a fireplace. People light ten or twenty fires a winter, on the handful of evenings that drop into the fifties, and assume that light use means no maintenance. It is precisely the wrong conclusion. Short, cool, smouldering fires never get the flue hot enough to carry volatiles out of the system, so they condense on the walls as glazed creosote — the hardest kind to remove and the easiest to ignite. Then there is the marine layer. From May through July the masonry here stays damp most mornings, and damp soot turns acidic and eats mortar joints from the inside where nobody looks. Add year-round bird and roof-rat activity and an uncapped flue that has sat open for a decade, and a great many chimneys in this county are carrying a season of nesting material on top of years of buildup.