Compare the highest-rated insulation professionals in Monrovia, California. All contractors are licensed, insured, and verified through our rigorous screening process.
A highly-rated, specialized contractor focusing primarily on attic services, including comprehensive insulation installation, removal, and air sealing. They are known for their efficiency, clean work, and expertise in improving home energy performance. They serve the entire San Gabriel Valley, including Monrovia.
Part of a national brand with a strong local franchise, Koala Insulation offers a wide range of services including blown-in, spray foam, and batt insulation. They emphasize eco-friendly options and provide free energy audits. Their reviews consistently praise their professionalism and knowledge.
This provider specializes in holistic home energy solutions. They combine insulation upgrades with air sealing and knowledge of local utility rebates to maximize customer savings. They are well-versed in modern insulation techniques for both existing homes and new construction.
The insulation market in and around Monrovia is competitive and served by a mix of specialized local contractors and broader home performance companies from neighboring cities like San Gabriel, Monterey Park, and Pasadena. The average quality of service is high, with contractors well-versed in California's strict Title 24 energy codes and the specific needs of the region's diverse housing stock, which includes everything from historic craftsman homes to modern builds. Homeowners are generally proactive about energy efficiency due to high local electricity costs, driving demand for quality insulation and air sealing services. Competition is strong, which helps maintain service standards. Typical pricing varies significantly based on the project scope and material. For a standard attic blow-in insulation job, homeowners can expect to pay between $1,500 and $3,500. Spray foam insulation is a premium option, often ranging from $3,000 to $7,000 or more for a full attic. Many providers offer free inspections and quotes, and they are typically knowledgeable about rebate programs available through Southern California Edison (SCE) and The Gas Company.
4.7+ star average from verified customer reviews
All contractors are properly licensed and insured
10+ years average experience in the industry
Familiar with Monrovia regulations and climate
Get answers to common questions about insulation services in Monrovia, California.
For a standard 1,500 sq. ft. attic in Monrovia, adding blown-in cellulose or fiberglass insulation to achieve the recommended R-38 value typically costs between $1,500 and $3,500. The final price depends on the existing insulation, attic accessibility, and material choice. Homeowners should also inquire about rebates from the Los Angeles Department of Water and Power (LADWP) or state programs like Energy Upgrade California, which can significantly offset costs.
The ideal time is during our mild fall (October-November) or spring (March-April) to avoid the intense summer heat in the attic and prepare your home for temperature extremes. However, insulation can be installed year-round. Scheduling during these shoulder seasons often provides better contractor availability and allows the upgrade to be completed before our hot, dry summer, maximizing immediate energy savings on air conditioning.
Yes, Monrovia follows the 2022 California Energy Code (Title 24), which sets strict performance standards for insulation (R-value) and overall building envelope efficiency. For any major renovation or addition, a permit is typically required, and the work must be inspected. A reputable local contractor will be familiar with these codes and can ensure your installation complies, which is crucial for both safety and eligibility for utility rebates.
Always verify the contractor holds a valid California CSLB license (C-2 Insulation and Acoustical or B-General Building). Ask for proof of insurance and local references in the San Gabriel Valley. Choose a provider experienced with our specific climate needs who offers a detailed, written estimate that includes the proposed R-value, material specifications, and a clear scope of work. Checking reviews on platforms like Nextdoor can also provide insights into local service quality.
While upgrading attic insulation to at least R-38 is one of the most effective steps, our local climate often requires a comprehensive approach. For optimal comfort, we recommend combining insulation with proper attic ventilation to expel trapped heat and sealing air leaks in ducts, recessed lighting, and attic hatches. This "seal and insulate" strategy addresses both conductive and convective heat gain, significantly reducing cooling costs and improving indoor temperature stability.