Most of Sunnyvale was built between 1950 and 1985, and a large portion of those homes and commercial buildings have never had their insulation touched since construction. At the time, insulation was treated as a minimum compliance item rather than a real investment, and air sealing was essentially not done at all. Forty to sixty years later, those buildings carry significant thermal deficits that show up every month on the PG&E bill. With Sunnyvale median home values well above $1.5 million, homeowners here have the equity to address these upgrades - and the savings add up fast at current utility rates.

The climate drives demand from both directions. Sunnyvale summers are warm and dry with daytime highs regularly reaching the mid-80s to low 90s from June through September, and the strong California sun degrades roofing and exterior materials faster than in cloudier climates. Winters bring concentrated rainfall, sometimes in heavy atmospheric river events, that puts moisture pressure on crawl spaces and aging stucco. The clay soils under much of the Santa Clara Valley swell in wet winters and shrink in dry summers - a cycle that slowly opens gaps in framing and foundation sills over time. Each of these factors compounds the insulation problem that the original construction left behind.

Sunnyvale is a mid-sized Silicon Valley city of about 155,000 residents sitting in the heart of Santa Clara County, bordered by Mountain View, Cupertino, Santa Clara, and San Jose. The city is home to major tech employer campuses and is one of the more expensive housing markets in the country, with median home values well above $1.5 million and a stable, largely owner-occupied residential population. The historic Murphy Avenue area near downtown and the Sunnyvale Heritage Park Museum anchor a city that has balanced its tech identity with a strong residential character.

The housing stock is predominantly single-story ranch homes built between the late 1940s and the 1970s, though recent years have added townhomes and condos near the Caltrain station and along El Camino Real. The older ranch homes on the west and central sides of the city are the most common candidates for insulation upgrades - these are well-maintained homes with original attic and wall insulation that was never designed for current energy costs. We serve neighboring Santa Clara, which borders Sunnyvale to the east and shares the same postwar building character throughout its residential neighborhoods.