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Rigid Foam Insulation Boards

Polyiso Rigid Foam Insulation Boards



At Ken Nichols Insulation we sell factory seconds polyiso rigid foam insulation boards at steeply discounted prices. We've been serving happy customers from all over the Midwest including Illinois, Indiana, Missouri, Iowa, Kentucky, Wisconsin, and more for almost 40 years!


Polyisocyanurate (polyiso) rigid foam insulation, also known as yellow foam insulation, is one of the best products for insulating under concreteattics, basements, garage doors, metal buildings (pole barns), and more.

Our insulation can be used under concrete slabs or flooring. It has been used under heated concrete floors for over 40 years.

It is so strong that some people drive semi trucks and trailers on the floors that are have the insulation under it. it has also been used under large walk-in large freezer units/refrigerated warehouse floors.


With an R value of about 6.5 per inch (R-6.5), polyiso rigid foam insulation has a higher R-value than both extruded polystyren (XPS) and expanded polystrene (EPS) rigid foam insulation with R-values of 5 (R-5) and 3.8 (R-3.8) respectively. Ken Nichols Insulation provides polyiso foam sheets of various thicknesses and with foil, gray latex, or black felt facing.

rigid foam insulation sheets, polyiso foam insulation panels

There are many benefits to using polyiso rigid foam insulation boards instead of fiberglass or cellulose insulation including the fact that foam insulation board does not easily absorb water, it can create an air seal when using foil insulation tape, and it doesn't lose its R-value through compression like fiberglass insulation may. See our prices at the top!

​Other Insulation Products



Cavity Fill Value Bundles

polyiso rigid foam insulation value bundles

Bundles of Mixed Thickness Insulation 

Cavity fill bundle. Various thicknesses. 4 foot tall stack. Each sheet is split into two 21 inch  x 8 foot pieces. Can be layered to fill cavities. 

First come, first served. Limited availability.



Per Bundle



Bundles of 2 1/2 Inch Thick Insulation 

Cavity fill bundle. 2 1/2 thick insulation. 4 foot tall stack. Each sheet is split into two 21 inch  x 8 foot pieces.  

First come, first served. Limited availability.



Per Bundle



Foil Insulation Tape

foil insulation tape

Seal the seams between sheets of insulation with our retail quality 2" wide aluminum foil insulation tape. One 150' roll will cover approximately twelve 4'x8' sheets when taping a ceiling or approximately eighteen 4'x8' sheets when taping a wall.



Per 2" x 150' Roll



Serving customers in many areas of Illinois (IL): Bloomington, IL | Carbondale, IL | Champaign, IL | Charleston, IL | Chicago, IL | Danville, IL | Decatur, IL | Effingham, IL | Galesburg, IL | Jacksonville, IL | Kankakee, IL | Lincoln, IL | Macomb, IL | Mattoon, IL | Moline, IL | Mt Vernon, IL | Peoria, IL | Quincy, IL | Springfield, IL | Taylorville, IL

Serving customers in many areas of Indiana (IN): Bloomington, IN | Evansville, IN | Fort Wayne, IN | Gary, IN | Indianapolis, IN | Lafayette, IN | Muncie, IN | South Bend, IN | Terre Haute, IN

Serving customers in many areas of Iowa (IA): Cedar Rapids, IA | Davenport, IA | Des Moines, IA | Fort Dodge, IA | Iowa City, IA | Mason City, IA | Sioux City, IA | Waterloo, IA

Serving customers in many areas of Missouri (MO): Columbia, MO | Farmington, MO | Joplin, MO | Kansas City, MO | Lebanon, MO | Maryville, MO | Poplar Bluff, MO | Springfield, MO | St Joseph, MO | St Louis, MO

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