Compare the highest-rated insulation professionals in Janesville, Illinois. All contractors are licensed, insured, and verified through our rigorous screening process.
A highly-rated, full-service insulation contractor based in the nearby Rockford area. They are known for their professionalism, expertise in both new and retrofit insulation projects, and strong focus on customer education and energy efficiency. They handle everything from comprehensive energy audits to the installation of various insulation types.
This provider has built a strong reputation in the region for reliability and quality workmanship, particularly in residential insulation. They offer a wide range of services, including crucial offerings like insulation removal and air sealing, which are essential for effective upgrades in older Janesville homes.
While based in Freeport, this company serves a wide area including Stephenson and Winnebago counties, making Janesville a logical part of their service territory. They differentiate themselves with a strong focus on holistic home performance and often work in conjunction with utility rebate programs.
** The insulation market serving Janesville, IL, is characterized by a reliance on established regional contractors from larger neighboring hubs like Rockford and Freeport, rather than a dense local competitive landscape. The average quality of available service is high, as these regional players have built their reputations over decades and maintain professional certifications (e.g., from BPI or as installers for specific manufacturers like Owens Corning or Johns Manville). Competition is moderate. While there are not dozens of companies vying for business directly in Janesville, the top regional providers are highly competent and compete on service quality, expertise, and the ability to maximize energy savings and comfort for homeowners. Typical pricing is in line with regional averages. For standard blown-in attic insulation, homeowners can expect a range of **$1,500 - $3,500** depending on square footage and existing conditions. Spray foam insulation is a premium service, with costs often ranging from **$3,500 to $7,500+** for an average attic. The prevalence of older housing stock in the area creates a strong demand for insulation removal and air sealing services, which are critical for achieving desired performance in retrofit projects. Many of these contractors are well-versed in local utility rebate programs (e.g., from ComEd or Nicor Gas) which can significantly offset the final 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 Janesville regulations and climate
Get answers to common questions about insulation services in Janesville, Illinois.
For Janesville's climate, which features cold winters and hot, humid summers, achieving a high R-value is crucial. Blown-in cellulose or fiberglass insulation is often recommended for attics as it provides excellent coverage and air sealing, helping to prevent ice dams in winter and reducing cooling costs in summer. The U.S. Department of Energy recommends attic insulation levels of R-49 to R-60 for our Illinois climate zone.
Costs vary based on home size, insulation type, and accessibility, but Janesville homeowners can expect to invest between $1,500 to $4,500 for a comprehensive attic insulation project in a typical older home. Regional material and labor rates influence pricing, and it's wise to get multiple quotes. Remember, Illinois and federal energy efficiency tax credits may be available to offset a portion of the cost, improving your long-term return on investment.
The ideal times are late spring (April-May) and early fall (September-October). These periods typically offer mild, dry weather, which is optimal for installation and allows contractors to properly assess and seal air leaks. Scheduling during these shoulder seasons also ensures your home is prepared before Janesville's severe winter cold sets in, and you can often avoid the peak summer and winter booking rushes of local contractors.
Yes, Illinois adheres to the International Energy Conservation Code (IECC), which sets minimum R-value requirements for insulation. Furthermore, any contractor you hire must be licensed and insured in Illinois. For specific projects, especially in historic districts of Janesville, you should check with the City's Building and Neighborhood Services Division to ensure compliance with any local preservation guidelines before proceeding.
Absolutely, uninsulated or poorly insulated walls are a major culprit for high heating and cooling bills in Janesville's older homes. A simple check is to feel interior walls on a cold winter day—if they feel noticeably cold, insulation is likely insufficient. The most definitive method is to hire a local professional for a thermal imaging scan, which can visually identify heat loss areas and help you target your insulation investment effectively.