Compare the highest-rated insulation professionals in Janesville, Wisconsin. All contractors are licensed, insured, and verified through our rigorous screening process.
A highly reputable, family-owned and operated company serving Southern Wisconsin for decades. While known for HVAC, they have a dedicated insulation division that provides a full range of home performance services, including energy audits and air sealing, ensuring a holistic approach to home efficiency.
A specialized insulation contractor based in the region with a strong focus on both residential and commercial projects. They are frequently noted in reviews for their professionalism, clean work, and expertise in various insulation types, particularly spray foam and blown-in cellulose.
A well-regarded local contractor that has expanded from foundational repair services to become a leading provider of comprehensive insulation solutions. Their integrated approach allows them to handle insulation removal, structural repairs, and new insulation installation seamlessly.
The insulation market in Janesville is competitive and of high average quality, characterized by a mix of specialized insulation contractors and full-service home performance companies. Due to the city's many homes built before modern energy codes, there is consistent demand for attic upgrades, air sealing, and basement insulation. Competition helps maintain fair pricing, but consumers should expect to pay for quality workmanship. Typical pricing can vary widely based on the project; a basic attic blow-in with cellulose might range from $1,500 - $3,000, while a full spray foam application in a roof or walls can run from $5,000 to $15,000 or more. Homeowners are increasingly aware of and interested in state and utility rebates (like those from Focus on Energy), which the leading providers are proficient at navigating. The top-tier companies distinguish themselves through certifications (from organizations like BPI or RESNET), transparent quoting processes, and a focus on comprehensive building science rather than just material installation.
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, Wisconsin.
For Janesville's climate, with its cold winters and humid summers, achieving a high R-value is critical. Blown-in cellulose or fiberglass insulation is often the most effective solution for attics, as it can be densely packed to reach the recommended R-49 to R-60 level for our zone. This creates a strong thermal barrier against Wisconsin's extreme temperature swings and helps prevent ice dams on your roof.
While insulation can be installed year-round, the best times are late spring (May-June) and early fall (September-October). These periods typically offer mild, dry weather in Southern Wisconsin, making it easier for contractors to work in your attic or crawlspace. Scheduling during these shoulder seasons also ensures your home is fully prepared before the peak heating season begins.
Yes, Janesville homeowners should first check with Focus on Energy, Wisconsin's statewide energy efficiency program, which offers cash-back rebates for qualifying insulation upgrades. Additionally, Alliant Energy and other local utilities serving the area often have their own incentives. It's also wise to consult with a local, reputable installer, as they are typically up-to-date on all available programs and can help you navigate the application process.
Always verify that the contractor is licensed and insured in Wisconsin. Look for companies with strong local references and a physical presence in the region, as they understand our specific building codes and climate challenges. Be sure to get multiple detailed written estimates that specify the type of insulation, R-value to be achieved, and a clear scope of work, not just a total price.
Insulation is crucial, but in many historic Janesville homes, air sealing is the first and most important step. Gaps, cracks, and outdated weatherstripping allow cold Wisconsin air to infiltrate, undermining even the best insulation. A professional energy audit or assessment is highly recommended to identify these air leaks. A comprehensive approach that combines air sealing with adding or upgrading insulation will deliver the greatest comfort and energy savings.