Chimney Masonry Repair in Carson, CA

Chimney Masonry Repair for Carson Homeowners

Carson incorporated in 1968 and most of its housing dates from the fifteen years either side of that, which puts it in an interesting middle ground for us. It is late enough that a substantial share of the fireplaces are factory-built metal units in framed chases rather than full masonry, and early enough that those units are now well past the age where refractory panels and chase covers need looking at. The city also sits close to the harbour and the refineries, so it gets the same salt-laden air that works on Long Beach, with the corrosion of galvanised caps, chase covers and dampers that comes with it. Ground conditions are the other Carson particular: parts of the city are built on filled and reclaimed land with a documented history of subsidence in the wider harbour area, so differential settlement is a live consideration on masonry stacks here rather than a theoretical one. Where we find a gap opening between chimney and wall in Carson, we want a camera down the flue before anybody quotes cosmetic repointing.

1960s-70s housing with many factory-built systems, harbour salt-air corrosion, and settlement on filled ground.

Masonry chimneys in this county fail from the top down and from water, not from fire. The crown cracks, rain gets into the brickwork, and then the marine layer keeps it from ever fully drying. Wet mortar in a coastal-influenced climate goes soft and sandy, the joints open, and the freeze-thaw cycle people assume is a cold-climate problem happens here too on a smaller scale — enough to spall the face off brick over twenty years. Near the water it is worse. Salt air across Long Beach, Torrance and Palos Verdes drives chloride into the mortar and corrodes anything ferrous inside the stack. The other half of our repair work is seismic. A chimney is a heavy unreinforced cantilever bolted to a light wood house, which is why it is the first thing to crack in a quake and why so much of the pre-1960 brick around Whittier and Long Beach is carrying old damage that was patched cosmetically and never actually repaired.