Compare the highest-rated insulation professionals in San Geronimo, California. All contractors are licensed, insured, and verified through our rigorous screening process.
A family-owned and operated business specializing in comprehensive home performance and insulation services. They are well-regarded for their expertise in energy efficiency audits and combining air sealing with advanced insulation techniques to maximize home comfort and savings. They serve the entire North Bay, including rural areas like San Geronimo.
This provider focuses on eco-friendly and sustainable insulation solutions. They are experts in blown-in cellulose and fiberglass, making them a top choice for attic insulation upgrades and wall insulation in existing homes. They are known for their knowledge of local utility rebates and building codes specific to Marin County.
A dedicated insulation contractor known for responsive service and quality workmanship on projects of all sizes. They offer a full suite of services but are particularly noted for their work in crawl spaces and basements, which are common in the older homes found in the San Geronimo area.
The insulation market serving San Geronimo is characterized by a small number of specialized, high-quality contractors based in the larger population centers of Marin County, such as San Rafael. Due to the rural nature of San Geronimo and the surrounding West Marin communities, contractors often include a trip charge or a slightly higher project minimum to account for travel. The competition is moderate but consists of established, professional firms rather than a saturated market of low-cost operators. Homeowners in this area are typically focused on energy efficiency, fire resistance, and preserving the character of older homes, leading to a high demand for services like blown-in wall insulation and attic upgrades. **Typical Pricing:** Pricing is generally at a premium compared to national averages, reflecting the high cost of living in Marin County and the expertise of the local contractors. As a rough guide: * **Attic Insulation (Blown-in):** $1,800 - $4,500 * **Wall Insulation (Blown-in):** $2,500 - $6,000+ * **Spray Foam Insulation:** $3.50 - $7.50 per board foot (highly variable based on type and project complexity) * **Energy Audit:** $400 - $800 It is highly recommended that homeowners obtain 2-3 quotes and verify the contractor's CSLB license number online before proceeding. Many of these providers can also assist in navigating available rebates from programs like 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 San Geronimo regulations and climate
Get answers to common questions about insulation services in San Geronimo, California.
San Geronimo's mild, coastal-influenced climate with cool, damp winters and dry summers means your primary goals are moisture management and maintaining consistent indoor temperatures. We recommend materials with strong resistance to mold and moisture, such as closed-cell spray foam or damp-proof batts, especially in crawl spaces and basements where the marine layer can increase humidity. Proper insulation also helps combat the significant temperature drops at night common in our valley.
Costs vary widely based on home size, access, and material, but for a typical older Marin County home, adding attic insulation can range from $1,500 to $4,500, while a full-home retrofit (walls, floors, attic) can range from $8,000 to $20,000+. Local factors like steep roof pitches, limited attic access common in older builds, and the need for moisture control can add to the project cost. Always get itemized quotes from local contractors.
Yes, significant regulations apply. California Title 24 mandates specific insulation R-values for your climate zone (Zone 3), and any major renovation may require you to bring the entire building's insulation up to current code. In Marin, you must also use insulation that meets California's strict fire safety standards, particularly for exposed insulation in attics or crawl spaces, and some projects may require a permit from Marin County Building and Safety.
The ideal time is during the dry season, typically late spring through early fall (May to October), to minimize weather delays for exterior work like wall injections. However, attic and interior work can be done year-round. Scheduling in the shoulder seasons (spring or fall) can be advantageous as contractors are less booked than in peak summer, allowing you to prepare your home for the coming winter dampness.
Prioritize contractors licensed, bonded, and insured in California with specific experience in Marin's older home stock. Verify they are familiar with Title 24 compliance and local fire codes. Ask for references from projects in West Marin and check reviews. A reputable provider will perform a thorough energy audit or assessment, offer solutions tailored to our climate (not just the cheapest option), and clearly explain available rebates from Marin Clean Energy or state programs.