24H Mold Inspection of Toluca Lake

The neighborhood is built around a private lake of roughly five acres, spring-fed rather than piped, and owned collectively by the homeowners whose lots front it. Springs are the reason the street running west of the water is called Valley Spring Lane, and they are also why the water table under these blocks sits closer to the surface than almost anywhere else on the valley floor. Lots here were subdivided in the 1920s and 1930s and built with lath and plaster over raised wood foundations. In a crawl space eighteen inches above damp ground with vents long since buried behind hedges and irrigation, the framing never gets a dry season.

Riverside Drive is the spine, running between the golf club fairways on the north side and the residential blocks below, and the mixed-use buildings along it are a different problem than the houses behind them. Storefronts and the two-story walk-ups over them went up between the 1930s and the 1960s with low-slope built-up roofs, shared party walls, and a few interior drains doing all the work. When one drain clogs, water spreads sideways over a ceiling grid instead of dripping in one obvious place. The apartments behind them are pre-1978 stock under the city's rent stabilization ordinance, where a habitability complaint needs documentation rather than an opinion.

The Village is a walkable commercial pocket of one-story storefronts, most of them originally built between the late 1920s and the 1950s and remodeled repeatedly for restaurant tenants ever since. Paty's has been on Riverside Drive since 1959, and the block around it carries the pattern: kitchens with hood systems, ice wells, and floor drains installed into buildings whose plumbing and slab predate them by decades. Grease-laden exhaust, dishwashing humidity, and a walk-in cooler sweating against an uninsulated party wall add water all day, and the tenant improvement that covered the last problem is usually the reason nobody saw the current one.

Bob Hope bought the house on Moorpark Street in 1939 and lived there until 2003, and the blocks around it hold the neighborhood's deepest lots: pools, guest houses, screening rooms, and additions layered on across seventy years of ownership. Every one of those additions is a seam. Where a 1950s wing meets a 1990s remodel meets a recent kitchen, the flashing, the drainage plane, and the vapor control rarely line up, and the subterranean spaces cut in during later remodels sit in ground that stays wet. Mature landscaping and irrigation running against original foundations finishes the picture on lots this size.

Cahuenga Boulevard carries traffic down out of the pass, paralleling the freeway that opened through it in 1940 and has been widened around this corridor ever since. The residential blocks nearest that alignment are the ones that got sound insulation: sealed windows, upgraded glazing, and mechanical ventilation replacing the operable windows the houses were designed around. A tighter envelope keeps noise out and keeps interior moisture in, so bathroom and kitchen humidity that used to leave through a cracked window now condenses on the coldest surface it can find. Add a mid-century wall furnace replaced by central air with ducts in an unconditioned attic, and the moisture has somewhere to collect.