Compare the highest-rated insulation professionals in Glendora, California. All contractors are licensed, insured, and verified through our rigorous screening process.
A highly-rated, specialized contractor focusing primarily on attic services, including insulation installation, removal, and air sealing. They are known for their efficiency, clean work, and expertise in improving home energy performance. They offer free inspections and are well-versed in local rebate programs.
A full-service insulation contractor serving the San Gabriel Valley, including Glendora. They offer a comprehensive range of insulation types and are recognized for their professional crews and knowledge of building science for optimal energy efficiency.
Part of a national brand with a strong local franchise, Koala Insulation is praised for its thoroughness and educational approach. They provide energy efficiency audits and specialize in both residential and commercial insulation solutions, including basement and crawl space work.
The insulation market in Glendora is characterized by a mix of a few local specialists and a strong presence of regional contractors from neighboring cities like Covina, West Covina, and Azusa. The competition is healthy, driving a generally high standard of quality and customer service. The market demand is influenced by Glendora's mix of older homes (requiring upgrades and replacement) and newer constructions, with a significant focus on improving energy efficiency due to Southern California's climate and high energy costs. Typical pricing varies significantly based on the project scope and insulation material. For a standard attic blown-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 an entire attic. Most reputable companies offer free estimates and are knowledgeable about available rebates from providers like SoCalGas and state-wide energy efficiency programs, which can substantially offset the project cost for homeowners.
4.7+ star average from verified customer reviews
All contractors are properly licensed and insured
10+ years average experience in the industry
Familiar with Glendora regulations and climate
Get answers to common questions about insulation services in Glendora, California.
For our hot, dry summers and mild winters, blown-in fiberglass or cellulose in attics is highly cost-effective, typically ranging from $1.50 to $3.50 per square foot installed. Spray foam offers superior performance for air sealing but costs significantly more ($3.00-$7.00 per sq ft). The best choice balances upfront cost with long-term energy savings, especially for keeping cool air in during Glendora's extended heat waves. Always check for available rebates from SoCalGas or SC Edison which can offset 20-30% of the project cost.
The ideal time is during our mild fall (October-November) or spring (March-April) when attic temperatures are tolerable for workers, ensuring proper installation. Avoid peak summer heat, as extreme attic temperatures can compromise the safety of installers and the performance of some materials like spray foam. Scheduling in these shoulder seasons also ensures your home is prepared before the intense summer heat arrives, maximizing your comfort and AC savings.
Yes. California Title 24 energy codes require specific insulation R-values (e.g., R-38 for attic floors in Climate Zone 10, which includes Glendora) for all new construction and major renovations. Additionally, if your home was built before 1980, you must have the insulation material tested for asbestos before disturbance. Reputable local contractors will handle all necessary permits from the Glendora Building Division and ensure compliance with these state and local regulations.
Look for contractors licensed by the California Contractors State License Board (CSLB) with specific insulation classification. Choose a provider with extensive local experience who can provide references from Glendora or nearby San Gabriel Valley homes. They should perform a thorough energy assessment, explain how our local microclimate affects their recommendation, and clearly outline available rebates. Avoid door-to-door sales and always get 2-3 detailed, written estimates.
While increasing attic insulation to the recommended R-38 or higher is the most critical first step, it may not be the complete solution for older Glendora homes. You likely also need air sealing to stop cool air from leaking out, proper attic ventilation to exhaust trapped heat, and possibly radiant barrier sheathing under the roof. A professional assessment should evaluate all these factors, as our high solar gain and temperature swings make a comprehensive approach essential for comfort.