Chimney Relining in Downey, CA

Chimney Relining 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.

A liner is what stands between the fire and the timber framing of your house, and a large number of chimneys in this county do not have a working one. Anything built here before about 1930 — much of Old Torrance, Uptown Whittier, the Long Beach bungalow neighbourhoods — was commonly built with no liner at all, just brick against brick. Later houses got terracotta tile, which is sound until the ground moves, and the ground here moves. Cracked and displaced tiles are the single most common serious defect we find on camera. The other driver is appliance change. Every gas conversion, every wood stove and every fireplace insert changes the volume and the temperature of what the flue has to carry, and an original masonry flue is nearly always far too large for a modern appliance. An oversized flue runs cool, which condenses acidic moisture inside the chimney and destroys it from within faster than any fire would.