At a Glance
Coverage Area: 32 (sq ft)
Mold Resistant
Water ResistantInsulfoam R- 1.88 , 0.5-in x 4-ft x 8-ft Faced Expanded polystyrene Board Insulation
Item #41503 |
Model #1/2X48X96 R-TECH
Delivery
Unavailable
Specifically developed for wall sheathing, basement insulation, siding underlayment and foundation insulation
Excellent insulating properties and moisture resistance
Poly-facer on both sides provide excellent durability and flexibility
Easy to cut-to-size and to install
General | |||
|---|---|---|---|
Package Quantity | 1 | Insulation Type | Expanded polystyrene |
Use Location | Indoor/Outdoor | ||
Dimensions | |||
|---|---|---|---|
Actual Length (Feet) | 8 | Common Width (Feet) | 4 |
Actual Thickness (Inches) | .5 | Coverage Area (Sq. Feet) | 32 |
Actual Width (Feet) | 4 | Package Weight (lbs.) | 1.33 |
Common Length (Feet) | 8 | R-Value per Inch | 3.85 |
Common Thickness (Inches) | .5 | Maximum R-Value | 1.88 |
Features | |||
|---|---|---|---|
Fire Resistant | No | Vapor Retardant | Yes |
Formaldehyde Free | Yes | Water Resistant | Yes |
Mold Resistant | Yes | Facing Material | Faced |
Sound Barrier | No | ||
Certifications | |||
|---|---|---|---|
CA Residents: Prop 65 Warning(s) | No | GREENGUARD Gold Certified | No |
ENERGY STAR Certified | Yes | ||
Compatibility | |||
|---|---|---|---|
For Use in Basements | Yes | For Use in Garage Doors | Yes |
For Use in Crawlspaces | Yes | For Use in Masonry | No |
For Use on Wood | Yes | For Use in Plumbing | No |
For Use in Ceilings | Yes | For Use in Vents | No |
For Use on Insulation | Yes | For Use in Walls | Yes |
For Use in Attics | Yes | For Use in Windows | No |
For Use in Doors | No | Fits 2 x 4 Walls | Yes |
For Use in Duct | No | Fits 2 x 6 Walls | Yes |
For Use in Electrical | No | For Use on Glass | No |
For Use in Floors | Yes | ||
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 rigid foam insulation for exceptional thermal performance and ease of installation. Most highlight how cleanly it cuts with a utility knife or saw, with pre-marked lines guiding precise cuts, making DIY projects straightforward. Reviewers consistently affirm strong insulating properties across diverse applications—garages, basements, pool bases, and outbuildings—describing results as excellent. The combination of effective performance and affordable pricing is repeatedly cited as a major advantage. A few note minor messiness from foam beads when cutting, and isolated complaints mention branding discrepancies, but these concerns are rare and do not diminish overall satisfaction.
Customer review summary generated by AI, including incentivized reviews.careless
They gave the driver the wrong size! The receipt says 2" thick and these are one inch.
From R- 7.8 , 2-in x 4-ft x 8-ft Faced Polystyrene Board Insulation Verified Purchaser
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