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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!


(as supply lasts)      



Big Saving Alert on Mixed Thickness -Value Bundles of 4' x 8' Sheets

We have lots of bundles of mixed-thickness bundles to choose from!

We're reducing our inventory and you're in for a treat. Get your hands on our mixed-thickness sheet bundles, mainly thin 4 x 8 sheets standing 4 feet tall, at a huge discount – just $200 per bundle. We also have some odds and ends. Give us a call at 1-800-424-1256 for details. 

First come, first served. Limited availability.



Per Bundle



JULY SALE​ ITEM (as supply lasts)       



1/2 Inch - Value Bundle of 4' x 8' Sheets

Introducing our Exclusive 1/2 Inch Insulation Value Bundle!

Get ready for the cold weather with a stack of 1/2-inch insulation that stands 4 feet tall. Each bundle contains around 80 4' x 8' sheets with foil on both sides, offering you unbeatable value.


Based on our regular discount price, this bundle would cost $320, but you can save an additional $120 if you buy it as a bundle.

This bundle boasts an incredible retail value of approximately $800, but you can grab it at this special discounted price of $200 for a limited time.


Don't miss out on this opportunity to save big!

First come, first served. Limited availability.



Per Bundle



JULY SALE​ ITEM (as supply lasts)       



Mixed Thickness -Value Bundle of 4' x 8' Sheets

Check Out Our Value Bundle of Mixed Thickness!

Prepare for the cooler seasons with our new mixed-thickness insulation bundle. The insulation bundle is 4 feet in height and made up of a variety of sheet thicknesses to meet all your insulation needs.

Grab this chance to enjoy substantial savings. Act now, as this offer is only available while supplies last!

First come, first served. Limited availability.



Per Bundle



JULY SALE​ ITEM (as supply lasts)       



2-1/2 Inch Insulation

Incredible Deal on 2-1/2 Inch Foil Backed Insulation...

We've got a surplus of 2.5-inch thick 4x8 sheets of foil-backed insulation available for just $20.00 per sheet. 

This unique thickness isn't part of our regular inventory.


It's a remarkable deal, considering these sheets typically retail for $50 or more. 

Don't miss out; grab this deal today. Act fast – it won't last!

First come, first served. Limited availability.



Per Sheet



​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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