At a Glance
Coverage Area: 32 (sq ft)
Water Resistant
Use Location: Indoor/OutdoorKingspan Insulation R- 2.8 , 0.50-in x 4-ft x 8-ft Unfaced Foam Board Insulation
Item #1058787 |
Model #100000048875
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XPS (Extruded Polystyrene) rigid foam board insulation with 25 psi minimum compressive strength
High R-value of 2.8 (R-5 per inch)
Lightweight, durable, easy to use, shiplap edges
Premium insulation value of R-2.8
Durable, yet easy to cut and shape, no loose beads
Retains integrity and insulating properties over time
Blowing agent blend GWP (Global Warming Potential) of less than 50, low ODP (Ozone Depletion Potential)
Meets and exceeds all ASTM C578 Type IV and Type X specifications
GreenGuard Insulation Board cannot be left exposed in an interior application and must be covered with an approved 15 minute thermal barrier
General | |||
|---|---|---|---|
Package Quantity | 1 | Insulation Type | Foam |
Use Location | Indoor/Outdoor | ||
Dimensions | |||
|---|---|---|---|
Actual Length (Feet) | 8 | Common Width (Feet) | 4 |
Actual Thickness (Inches) | 0.50 | Coverage Area (Sq. Feet) | 32 |
Actual Width (Feet) | 4 | Package Weight (lbs.) | 3 |
Common Length (Feet) | 8 | R-Value per Inch | 5 |
Common Thickness (Inches) | 0.50 | Maximum R-Value | 2.8 |
Features | |||
|---|---|---|---|
Fire Resistant | No | Sound Barrier | No |
Formaldehyde Free | Yes | Vapor Retardant | Yes |
Mold Resistant | No | Water Resistant | Yes |
Paintable/Stainable | Paintable | Facing Material | Unfaced |
Certifications | |||
|---|---|---|---|
CA Residents: Prop 65 Warning(s) | No | ENERGY STAR Certified | No |
Warranty | |||
|---|---|---|---|
Warranty | None | ||
Compatibility | |||
|---|---|---|---|
For Use in Basements | Yes | For Use in Floors | Yes |
For Use in Crawlspaces | Yes | For Use in Garage Doors | No |
For Use on Plastic | No | For Use in Masonry | Yes |
For Use on Metal | No | For Use in Plumbing | No |
For Use on Wood | Yes | For Use in Vents | No |
For Use in Ceilings | Yes | For Use in Walls | Yes |
For Use on Insulation | Yes | For Use in Windows | No |
For Use in Attics | Yes | Fits 2 x 4 Walls | Yes |
For Use in Doors | No | Fits 2 x 6 Walls | Yes |
For Use in Duct | No | For Use on Glass | No |
For Use in Electrical | No | ||
Miscellaneous | |||
|---|---|---|---|
UNSPSC | 30141500 | ||
Check out the Best Selling Board Insulation on Lowes.com
Ratings may include incentivized customer reviews.
What Customers Are Saying
Customers overwhelmingly praise this foam board for its ease of use, strong insulation performance, and impressive versatility. Most highlight how easily it cuts with a sharp knife and installs for insulation projects, from under flooring to exterior walls. Reviewers report significant improvements in temperature control and reduced heating costs, with many noting it prevents heat loss effectively. The material serves diverse applications—theatrical sets, reptile enclosures, crafts—thanks to its lightweight yet sturdy nature. A few mention brittleness if mishandled or minor edge fitting issues, but these concerns are infrequent and do not diminish overall satisfaction.
Customer review summary generated by AI, including incentivized reviews.Blocked two garages
Gig delivery is a bunch of clowns. Delivery put the stuff in front of 2 garage doors instead of putting at the front door.
Verified Purchaser
Excellent product
Great product, I used it to build a thermal box to go above the opening of my attic pulldown stairs, made a huge difference in temperature in my hall.
Verified Purchaser
VBS Project
worked perfectly for Vacation Bible School projects.
Verified Purchaser
Good stuff.
What I needed.
Verified Purchaser
Good product, good price!
Just what I needed for a fair price!
Verified Purchaser
Easy to use
Our house’s foundation is built of concrete blocks. In order to reduce radon levels, we were instructed to seal the tops of the blocks. This is what we purchased this product for. I liked that it was easy to cut with a box cutter and that it did not disintegrate into many little “pills” when cut.
Verified Purchaser
12 Questions
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Can this be sold as ceiling panels and textured?
Ytrammm on April 30, 20260
Answers
Does it have covering on both sides.
Rich on March 25, 20260
Answers
Can this be used under peel and stick tiles?
Susan C on January 28, 20250
Answers
Can this be used between drywall and wood tongue and groove on a ceiling?
Cabinlife on July 22, 20230
Answers
Could this be used over decking floor on a 3 season porch with a rug on top? Would it hold the weight of furniture or people walking on it?
klizmiz on February 10, 20230
Answers
Is this safe to use around animals?
Lonnie on January 21, 20230
Answers
what mounting screws do i need and is this uv resistant
tyler on December 23, 20220
Answers
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COMPARE PRODUCTS
Name | ||||||||
|---|---|---|---|---|---|---|---|---|
Ratings | ||||||||
Insulation Type | Foam | |||||||
Actual Thickness (Inches) | 0.50 | |||||||
Common Thickness (Inches) | 0.50 | |||||||
Expanded polystyrene | Foam | Foam | Polystyrene | Foam | Foam | Polyisocyanurate | Polystyrene | Foam |
1.4375 | 1 | 2 | 2 | 0.75 | 0.2 | 1.5 | 2 | 1.5 |
1.5 | 1 | 2 | 2 | 0.75 | 0.2 | 1.5 | 2 | 1.5 |
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