Compare the highest-rated insulation professionals in Angwin, California. All contractors are licensed, insured, and verified through our rigorous screening process.
A highly-rated, full-service home performance contractor based in the heart of Napa Valley. They specialize in comprehensive energy efficiency upgrades, with a strong focus on advanced insulation and air sealing techniques. They are well-known for their professional audits and for helping homeowners navigate available rebates.
A local contractor with a long-standing presence in the Napa Valley area. They have a strong reputation for reliability and quality workmanship in both residential and commercial insulation projects. They offer a wide range of insulation types and are experienced with the specific needs of older Wine Country homes.
While based slightly farther away, this provider is a specialist in spray foam application, a service highly sought after for its superior air-sealing and R-value. They serve the entire North Bay region and are a go-to contractor for complex insulation projects, including crawl spaces and cathedral ceilings, which are common in the Angwin area.
** The insulation market serving Angwin, CA, is characterized by a small number of highly specialized, quality-focused contractors rather than a high volume of competitors. Due to Angwin's location in the California wine country and its mix of older, historic homes and newer builds, the demand is for contractors who understand complex roof lines, wine cellar climate control, and the specific energy efficiency challenges of the region's climate (cool, wet winters and hot, dry summers). The average quality of service is high, as the contractors operating in this niche market rely heavily on reputation and word-of-mouth. Competition is moderate but professional. Typical pricing is at a premium compared to national averages, reflecting the high cost of living in the Napa Valley area, the expertise of the local contractors, and the often complex nature of the installations. Homeowners should expect comprehensive energy audits to be a standard first step for top-tier providers, who use the data to tailor solutions that often qualify for state and utility rebates (e.g., through BayREN).
4.7+ star average from verified customer reviews
All contractors are properly licensed and insured
10+ years average experience in the industry
Familiar with Angwin regulations and climate
Get answers to common questions about insulation services in Angwin, California.
Angwin's climate features hot, dry summers and cool, wet winters, with occasional frost. This requires insulation that effectively manages both heat gain and heat loss. We recommend focusing on a high R-value in the attic to combat summer heat and ensuring proper air sealing to manage moisture during the rainy season, which is critical for preventing mold in our local microclimate.
For a standard 1,500 sq. ft. attic in Angwin, blown-in cellulose or fiberglass insulation (to achieve a recommended R-38 to R-49 for our zone) typically ranges from $1,800 to $3,500, depending on material and accessibility. Costs can be higher for spray foam or complex vaulted ceilings common in hillside homes. Always get itemized quotes from local providers that include air sealing.
Yes. California's Title 24 energy codes mandate specific R-values for different parts of the home, which any reputable contractor will follow. For older homes, you must also consider that disturbing insulation may require testing for asbestos if the building was constructed before 1980. Additionally, Napa County may require a permit for major re-insulation work, especially if it involves structural elements.
The ideal time is during the late spring (May-June) or early fall (September-October). These periods typically offer mild, dry weather, which is safer for contractors working in your attic and allows for proper ventilation during installation. Avoid the peak of summer heat for crew safety and comfort, and the heart of the rainy season to prevent moisture issues during the project.
Prioritize contractors licensed, bonded, and insured in California with specific experience in our area's older homes and varied construction. They should perform a thorough energy audit and understand Title 24. Ask for local references in Angwin or nearby communities like St. Helena, and verify they are certified by manufacturers (like Owens Corning) or programs like BPI (Building Performance Institute).