24H Mold Inspection of Palmdale

Palmdale became a city in August 1962, incorporating just 2 square miles of land around what is now the civic center. The streets around it hold the city's oldest homes and commercial buildings: small single-story houses from the 1950s and 1960s, older commercial frontage along Palmdale Boulevard, and buildings that have been expanded, re-roofed, and re-plumbed several times. Original galvanized lines, roofs layered over older roofs, evaporative coolers leaking at their curbs, and additions joined to small original houses are the usual moisture paths here, along with flat-roofed storefronts whose drains fill with wind-blown sand and debris.

The federal government bought the Palmdale airport in 1952 and established Air Force Plant 42, and Lockheed set up there the following year; its Skunk Works division later made the plant its base. The aerospace jobs drove housing across the east side, where single-story stucco homes on slabs now range from 40 to 70 years old. Slab leaks, cast-iron drains cracking under bathrooms, roof-mounted coolers run during monsoon humidity, and garage conversions on unsealed concrete are the recurring sources of hidden moisture, with winter freezes adding burst lines in exterior walls and garages.

The San Andreas Fault runs through Palmdale along the north shore of Lake Palmdale, and just north of the Avenue S exit Highway 14 passes through a road cut whose eastern wall exposes nearly 90 feet of rock layers folded and squeezed between faults; the California Aqueduct crosses the fault here too. Homes on the city's south side live closest to that boundary. Earthquakes open hairline cracks in stucco and slabs, loosen window and door flashing, and strain plumbing joints inside walls and beneath floors — creating the paths that let the next storm, or a slowly weeping line, put water where it can't dry.

Rancho Vista, on the west side, was largely built from the late 1980s through the 1990s, and many of its two-story stucco homes on large lots date to 1987 through 1990. Thirty-five years on, original systems are failing together: water heaters and supply lines in garages and closets, condensate lines from attic air handlers clogging and overflowing into ceilings, roofing underlayment wearing out beneath tiles that still look intact, and stucco cracks around windows letting storm water behind the wall. Upstairs bathrooms over living space add the risk of a slow leak soaking the floor framing between levels before it shows below.

Anaverde is a 2,000-acre master-planned community in the hills on the city's southwest side, planned for some 5,000 homes and the first new master-planned community in the Antelope Valley since the 1980s. Homes sit on graded hillside pads with tight envelopes, energy-efficient windows, and attic HVAC. The moisture risks are newer-construction ones: shower and cooking moisture held indoors when ventilation is undersized, ducts sweating in hot attics through long cooling seasons, framing and concrete closed in before fully dry, and irrigation and runoff on sloped lots moving toward slab edges and retaining walls on the downhill side of the home above.