Chimney Leaks & Storm Damage in Manhattan Beach, CA

Chimney Leaks & Storm Damage for Manhattan Beach Homeowners

Manhattan Beach has been comprehensively rebuilt over the past three decades, and that produces two distinct kinds of work sitting side by side on the same street. The new construction — and there is a great deal of it, particularly through the Sand Section and the Tree Section — is overwhelmingly sealed direct-vent gas: modern, efficient appliances that need burner, glass, gasket and vent-termination service rather than sweeping, and that fail in appliance ways rather than masonry ways. The surviving older cottages, mostly 1930s to 1950s, still carry conventional masonry chimneys that are now eighty-odd years into an exceptionally corrosive coastal exposure. On the Hill Section the two intermingle. Whichever category a property falls into, the salt air is the constant: this is beachfront exposure in the full sense, and any galvanised or low-grade stainless component at the top of a flue has a short and visibly rusty life here. We specify to the exposure as a default rather than as an option.

Extensive teardown-and-rebuild producing mostly sealed direct-vent gas appliances, surviving 1930s-50s cottages with ageing conventional masonry, and full beachfront salt exposure that dictates stainless grade on every exposed component.

A chimney is the only part of a roof that is deliberately full of holes, and Los Angeles tests that arrangement in a punishing way. Months of dry heat open joints and shrink sealant, and then a season's rain arrives inside a few atmospheric river systems, hitting masonry that has had no chance to acclimatise. Water gets in at four places: a cracked crown, failed flashing where the stack passes through the roof, a missing or damaged cap, and brickwork that has become porous enough to drink. The difficulty is that the stain inside the house rarely appears under the actual entry point — water tracks down the outside of the flue and shows up a storey below, in a different room. Sealing where the stain is achieves nothing, which is why people end up paying for the same leak three times. Finding it properly means getting on the roof and testing, not guessing from the ceiling.