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Business Details
50 Years
experience
Your Trusted Source for Discounted Polyiso Insulation in Sullivan, IL
Ken Nichols Insulation has been a trusted provider of high-quality insulation solutions since 1976. Founded by Ken Nichols in Sullivan, Illinois, our family-owned business specializes in offering factory-second polyiso rigid foam insulation boards at deeply discounted prices. With over 40 years of experience serving customers across the Midwest, including Illinois, Indiana, Missouri, Iowa, Kentucky, and Wisconsin, we have built a reputation for delivering durable, energy-efficient insulation products tailored to meet diverse project needs. Our polyiso insulation, known for its exceptional R-value of 6.5 per inch, is ideal for under-concrete slabs, attics, basements, garage doors, and metal buildings.

We prioritize customer satisfaction by providing expert guidance, competitive pricing, and a commitment to sustainability through repurposed materials. Our teams extensive knowledge ensures clients receive the right insulation solutions for both residential and commercial applications, backed by decades of hands-on industry experience.
Services
Under-Concrete Insulation Attic Insulation Basement Insulation Garage Door Insulation Metal Building Insulation
Details
  • Year established: 1976
Highlights and features
  • We offer factory-second insulation at up to 60% below retail prices.
  • Our polyiso boards provide an R-value of 6.5 per inch for superior efficiency.
  • Family-owned service with 40+ years of Midwest insulation expertise.
  • Serving 10+ states across the Midwest with localized project knowledge.
  • Specialize in under-concrete, attic, and metal building insulation solutions.
Services
Under-Concrete Insulation
Our polyiso rigid foam insulation is ideal for under-concrete applications, providing high compressive strength and R-6.5 per inch. Used beneath heated floors and industrial slabs, it prevents heat loss while supporting heavy loads like semi-trucks. Clients benefit from energy savings and long-term durability in residential and commercial projects.
Attic Insulation
Polyiso boards offer superior R-value for attic spaces, reducing energy costs by minimizing heat transfer. Easy to cut and install between joists, this solution improves home efficiency and comfort. Customers receive factory-second pricing while maintaining performance for retrofit or new construction projects.
Basement Insulation
High R-value polyiso boards insulate basement walls and floors, resisting moisture and maintaining thermal efficiency. Attached with construction adhesive, this product enhances energy conservation and prevents cold spots. Clients gain cost-effective insulation that meets building code requirements for below-grade applications.
Garage Door Insulation
Rigid foam boards reduce energy loss through uninsulated metal garage doors. Custom-cut to fit panels, this solution stabilizes interior temperatures and lowers heating/cooling costs. Customers benefit from improved comfort in attached garages and protection against temperature extremes.
Metal Building Insulation
Polyiso insulation controls temperature, condensation, and noise in metal buildings. Installed in walls and roofs, it delivers R-6.5 per inch efficiency while meeting commercial project budgets. Clients gain an affordable, high-performance solution for agricultural, industrial, and storage structures.
People
Ken Nichols
Founder
Ken Nichols founded the company in 1976, starting from his garage. With over 40 years of experience, he pioneered discounted factory-second insulation sales, building a family-owned business serving Midwest customers with reliable, cost-effective solutions.
Questions
Do you offer shipping or delivery services?
No, all orders must be picked up at our Sullivan, IL warehouse. We do not provide shipping or delivery.
What payment methods do you accept?
We accept cash or check with proper ID. Credit card payments are not available.
Is your insulation first-quality material?
Our rigid foam insulation is factory seconds, meaning it may have minor defects. Sales are final, and products are sold 'as is.'
What areas do you serve?
We serve customers across Illinois, Indiana, Missouri, Iowa, Kentucky, Wisconsin, and surrounding Midwest regions.
Can I reserve products before visiting?
No, all products are sold on a first-come, first-served basis. Call ahead to check availability.
Reviews (2)
Parker Whitaker
Jul 23, 2019 Report
Excellent price and selection on factory seconds of foam insulation. I highly recommend getting foam insulation from this business! Thank you for the great service!
Lisa Jean
Sep 14, 2016 Report
Wonderful man! excellent product! couldnt be happier with the price! Even helped me load it and tie it down.