Compare the highest-rated insulation professionals in Janesville, Iowa. All contractors are licensed, insured, and verified through our rigorous screening process.
A leading regional contractor known for comprehensive home performance services. They specialize in creating energy-efficient building envelopes using high-quality materials like spray foam and cellulose. Their strengths include detailed energy audits and leveraging available rebate programs for homeowners.
ProTech has built a strong reputation in North Iowa for professional and clean installation services. They are particularly noted for their blown-in cellulose and fiberglass systems for existing walls and attics, as well as thorough insulation removal and replacement services.
A specialized contractor focused on air sealing and spray foam applications. They are experts in insulating hard-to-treat areas like basement rim joists and crawl spaces, significantly improving home comfort and reducing air infiltration.
The insulation market serving Janesville, Iowa is characterized by a handful of high-quality, regional contractors based in larger nearby cities. Due to Janesville's small size and rural nature, there are no dedicated insulation providers physically located within the city limits. Homeowners typically rely on established companies from the Cedar Valley area (Cedar Falls/Waterloo) and Waverly. The competition among these top-tier providers is strong, driving a high standard of quality, professional certifications (like BPI), and knowledge of local building codes and utility rebates from providers like MidAmerican Energy. Pricing is competitive and in line with regional averages; a typical attic blow-in project can range from $1,500 to $3,000, while full spray foam applications are a premium service costing $4,000 and up, depending on the scope. The market is mature, with providers offering a full suite of services from audits to 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, Iowa.
For Janesville's cold winters and humid summers, a combination approach is often best. We typically recommend air-sealing first, then adding high-performance materials like spray foam in attics and basements for air barriers, or dense-packed cellulose in walls for its excellent thermal and soundproofing properties. The goal is to achieve a high R-value (recommended R-49 for attics in Iowa's climate zone) while managing moisture to prevent mold.
Costs vary by home size, existing conditions, and material, but for a standard 1,500 sq ft home in the Janesville area, whole-house insulation projects often range from $3,000 to $7,000. Attic insulation alone typically costs $1,500-$2,500. It's important to get a detailed, in-person assessment, as many Iowa utilities and programs like those from Alliant Energy offer rebates that can significantly offset the final cost for homeowners.
While insulation can be installed year-round, the ideal times are late spring (May-June) and early fall (September-October). These periods typically offer mild, dry weather in Iowa, which is crucial for certain materials like spray foam that require specific temperature ranges for proper curing. Scheduling during these shoulder seasons also avoids the peak summer and winter rush, potentially leading to better scheduling and pricing.
Yes, there are important local considerations. In Iowa, all insulation contractors must be licensed by the Iowa Division of Labor. For Janesville specifically, you should check with the City Clerk or Building Department about any required permits for major retrofits. Furthermore, work must comply with the 2018 International Residential Code (IRC), which Iowa follows, including specific requirements for vapor retarders in our climate zone to prevent moisture issues.
Absolutely. In an older home, the attic is often the single largest source of heat loss in winter and heat gain in summer. Properly air-sealing and insulating your attic to the recommended Iowa standard of R-49 can reduce your heating and cooling costs by 15% or more. You'll notice a more consistent temperature throughout the house, reduced drafts, and less strain on your HVAC system, which is especially valuable during our extreme Iowa temperature swings.