Compare the highest-rated insulation professionals in Napa, California. All contractors are licensed, insured, and verified through our rigorous screening process.
A highly-rated, full-service insulation and energy efficiency contractor serving the Napa Valley. They are known for comprehensive home performance upgrades, specializing in attic insulation, air sealing, and insulation removal. They are a BPI (Building Performance Institute) certified company, which underscores their commitment to scientific energy auditing and effective air sealing.
A well-established local contractor offering a wide array of insulation services for both residential and commercial properties. They are recognized for their work in blown-in cellulose and fiberglass, as well as crawl space and basement encapsulation, which is crucial for Napa's varied home styles and moisture control.
While based slightly outside Napa, this company is a leading specialist in spray foam insulation for the entire North Bay region, including Napa. They focus on high-performance insulation solutions for new construction and major retrofits, offering both open-cell and closed-cell spray foam applications.
** The insulation market in Napa, California, is characterized by a focus on energy efficiency and home performance, driven by the region's climate with warm, dry summers and cool, wet winters. The market is moderately competitive, with a mix of a few specialized local contractors and several larger regional companies that serve the Napa Valley. Quality is generally high, as contractors must be well-versed in California's strict Title 24 energy codes and are often knowledgeable about available rebates from providers like Pacific Gas and Electric (PG&E). Typical pricing is on the higher end, reflecting the cost of living in the Bay Area and the specialized nature of the work. For blown-in attic insulation, homeowners can expect to pay between $1,500 and $4,000. Spray foam insulation is a premium service, with costs ranging from $2.00 to $5.00 per board foot, making a full attic project easily exceed $5,000. The demand for comprehensive services that include air sealing and energy audits is strong, as homeowners seek to reduce energy costs and improve indoor comfort year-round.
4.7+ star average from verified customer reviews
All contractors are properly licensed and insured
10+ years average experience in the industry
Familiar with Napa regulations and climate
Get answers to common questions about insulation services in Napa, California.
Napa's Mediterranean climate features hot, dry summers and cool, damp winters, making year-round thermal performance and moisture management critical. We typically recommend materials like blown-in cellulose or fiberglass batts with a high R-value for attics to combat summer heat gain, and we pay special attention to proper air sealing and vapor barriers in walls to prevent moisture intrusion during the wetter months, which can lead to mold.
For a standard 1,500 sq. ft. attic in Napa, adding blown-in cellulose or fiberglass to achieve California Title 24-recommended levels (often R-38 to R-49) typically ranges from $1,800 to $3,500. Costs vary based on material choice, existing insulation removal, and the complexity of the attic space. Many Napa homeowners qualify for rebates through programs like BayREN, which can significantly offset this investment.
The ideal time is during the drier months of late spring (May-June) or early fall (September-October). This avoids the intense summer heat in the attic, which can be hazardous for installers, and the winter rains that can complicate exterior prep work or deliveries. Scheduling during these shoulder seasons also ensures your home is optimized for both the upcoming summer heat and winter chill.
Yes, insulation work in Napa must comply with the California Title 24 Energy Code, which sets minimum R-value requirements. While simple attic insulation often doesn't require a permit, wall insulation, structural alterations, or any work affecting ventilation typically does require a permit from the City of Napa or County Building Division. A reputable local contractor will handle this process for you.
The attic is almost always the highest priority. In our climate, a poorly insulated attic is the primary source of heat loss in winter and heat gain in summer, leading to high AC and heating bills. Sealing attic air leaks (like around plumbing stacks and light fixtures) and adding insulation to at least R-38 provides the best return on investment for comfort and energy savings in a Napa home.