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136581
Item #136500
Model #
4.5" / Full Sheet 4'x8' / Good - Factory 2nd*494722213153574" / Full Sheet 4'x8' / Good - Factory 2nd*494248861043494" / Full Sheet 4'x8' / Damaged*494722166950694" / Half Sheet 4'x4' / Good - Factory 2nd*493209574443814" / Foil Faced Full Sheet 4' x 8' / Good - Factory 2nd*494951854902054" ISO + .5" OSB / Full Sheet 4'x8' / Good - Factory 2nd*494951921421093.1" / Full Sheet 4'x8' / Good - Reclaimed*496792297802533" / Full Sheet 4'x8' / Good - Factory 2nd*494248860388133" / Half Sheet 4'x4' / Good - Factory 2nd*493209574116132.75" / Full Sheet 4'x8' / Good - Factory 2nd*494951855229732.5" / Full Sheet 4'x8' / Good - Factory 2nd*494248855145252.5" / Full Sheet 4'x8' / Damaged*494722168916772.5" / Half Sheet 4'x4' / Good - Factory 2nd*493209573788452.5" / Foil Faced Full Sheet 4' x 8' / Good - Factory 2nd*494951856540452" / Full Sheet 4'x8' / Good - Reclaimed*494248855800612" / Half Sheet 4'x4' / Good - Factory 2nd*493209573460772" / Foil Faced 16" x 96" / Good - Factory 2nd*494951856868131.75" / Full Sheet 4'x8' / Good - Factory 2nd*494248856455971.75" / Half Sheet 4'x4' / Good - Factory 2nd*493209573133091.5" / Full Sheet 4'x8' / Good - Factory 2nd*494248859732771.5" / Half Sheet 4'x4' / Good - Factory 2nd*493209572805411" / Full Sheet 4'x8' / Good - Factory 2nd*494248859077411" / Half Sheet 4'x4' / Good - Factory 2nd*493209572477730.5" Super Dense / Full Sheet 4'x8' / Good - Factory 2nd*49424885776669Tapered 2.5" > .5" / Half Sheet 4'x4' / Good - Factory 2nd*49472559644957Tapered 2.5" > 1.5" / Half Sheet 4'x4' / Good - Factory 2nd*49495185785117Tapered 1" > .5" / Half Sheet 4'x4' / Good - Factory 2nd*49495185916189
Polyiso Insulation Board-
Polyiso Insulation Board -
Polyiso Insulation Board -
136581
136581
136581
Item #136500
Model #
.5""
variant-option2="Half Sheet 4'x4'"
variant-option3="Good - Factory 2nd"
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1.5""
variant-option2="Half Sheet 4'x4'"
variant-option3="Good - Factory 2nd"
variant-sample=""
sale-truth="true"
sale-message=""
shipping-message=""
backend-order=""
backend-message=""
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currentDate="2026-03-05"
featured-variant-image="51680473841949"
>
.5""
variant-option2="Half Sheet 4'x4'"
variant-option3="Good - Factory 2nd"
variant-sample=""
sale-truth="true"
sale-message=""
shipping-message=""
backend-order=""
backend-message=""
backend-date=""
currentDate="2026-03-05"
featured-variant-image="51680473841949"
>
$50.00
Shipping calculated at checkout.
Polyiso Rigid Foam useful for all sorts of projects - walls, roofs. (not for use under concrete)
IN STOCK at our warehouse in Fairfield, Iowa
Most are NEW Factory Seconds
Retails for $60 per sheet or more.
4' x 8' and 4' x 4' Sheets:
Thick R-Value Price
| Thickness | R-Value | 4 x 8 | 4 x 4 |
| 4" + 1/2" OSB | R-25 | N/A | N/A |
| 4.5" | R-27 | N/A |
N/A |
| 4" Foil Faced | R-24 | N/A | N/A |
| 4" | R-24 | $50 | $25 |
| 4" Damaged | R-24 | $40 | N/A |
| 3.1" | R-18 | $40 | N/A |
| 3" | R-18 | $35 | $17 |
| 2.75" | R-16.5 | $33 | N/A |
| 2.5" | R-15 | N/A | $15 |
| 2.5" Damaged | R-15 | $20 | N/A |
| 2" | R-12 | $35 | $12 |
|
2" x 16" x 96" Foil Faced |
R-12 | N/A | N/A |
| 1.75" | R-10.5 | $23 | $12 |
| 1.5" | R-9 | $20 | $10 |
| 1" | R-6 | N/A | $7 |
| .5" | R-3 | $5 | N/A |
| Tapered 2.5">.5" | R-15 | N/A | $25 |
| Tapered 2.5">1.5" | R-10.5 | N/A | $30 |
| Tapered 1">.5" | R-6 | N/A | $15 |
Discounts only on 100 Sheets or more
GOOD ON BOTH SIDES
Similar to Pink Board, Blue Board, EPS, XPS
NOT FOR USE UNDER CONCRETE - because it can absorb water.
GREAT FOR USE ON WALLS AND ROOFS.
Located in Fairfield, Iowa 52556
Shipping can be arranged for 1/2 truckload or more within 200 miles.
Specs for
4" / Full Sheet 4'x8' / Good - Factory 2nd
Basics
Chemically-sensitive safe
Questions & Answers