Chimney Masonry Repair in Rancho Palos Verdes, CA

Chimney Masonry Repair for Rancho Palos Verdes Homeowners

Rancho Palos Verdes is the most demanding place we work and the one where a chimney is least likely to be ordinary. The housing is largely 1960s and 1970s custom and semi-custom hillside building, with tall architectural stacks on steeply pitched roofs, often exposed on three sides. Three local conditions drive everything. The first is marine exposure: fog, salt and wind coming straight off the water, which corrodes any ferrous metal at the top of a stack and keeps masonry damp far longer than it dries. The second is wind loading on those tall exposed chimneys, which is why caps here must be mechanically fixed rather than friction fitted. The third is ground movement, and it is not historical: the Portuguese Bend landslide complex is active, and in the affected areas structures are being sheared continuously rather than in single events. A chimney in a moving zone will crack again after it is repaired, and we would rather tell an owner that plainly than take money for a repair that will not hold.

Tall exposed 1960s-70s hillside stacks, heavy salt and fog corrosion, high wind loading, and active land movement at Portuguese Bend.

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.