At a Glance
Coverage Area: 32 (sq ft)
Mold Resistant
Water ResistantSTYROFOAM Residential Sheathing R- 5 , 1-in x 4-ft x 8-ft Faced Polystyrene Board Insulation
Item #5181281 |
Model #12086059
STYROFOAM Residential Sheathing is an extruded polystyrene foam board with plastic film facers on both sides providing a long term insulating performance of R-5 per inch sizing
This 1-in thick 4ft x 8ft Residential Sheathing has a tongue and groove edge treatment to help boards fit snugly against one another and ensure energy efficiency
Lightweight, making it easy to handle and remains a simple matter to cut to size with a score and a snap
Defends against wind-driven moisture penetrating a wall system, providing an effective layer of protection for wood components and cavity insulation while moderating temperature in the wall cavity
Minimum compressive strength of 15 PSI
New formulation reduces global warming potential (GWP) and greenhouse gas (GHG) emissions - you will get aesthetics, performance and sustainability
Can be placed directly over uninsulated studs using let-in bracing or metal strappings to provide the code-required lateral structural bracing, or as an insulating and weather barrier layer over wood panel sheathings such as OSB or plywood
30 year limited warranty for peace of mind
General | |||
|---|---|---|---|
Series Name | Residential Sheathing | Compression Strength (PSI) | 15 |
Package Quantity | 1 | Edge Profile | square edge |
Use Location | Indoor/Outdoor | Paintable | Yes |
Insulation Type | Polystyrene | ||
Dimensions | |||
|---|---|---|---|
Actual Length (Feet) | 8 | Common Width (Feet) | 4 |
Actual Thickness (Inches) | 1 | Coverage Area (Sq. Feet) | 32 |
Actual Width (Feet) | 4 | Package Weight (lbs.) | 4.53 |
Common Length (Feet) | 8 | R-Value per Inch | 5 |
Common Thickness (Inches) | 1 | Maximum R-Value | 5 |
Features | |||
|---|---|---|---|
Fire Resistant | No | Water Resistant | Yes |
Formaldehyde Free | Yes | Sound Insulation | No |
Mold Resistant | Yes | Facing Material | Faced |
Sound Barrier | No | Pre-Cut | No |
Vapor Retardant | Yes | ||
Certifications | |||
|---|---|---|---|
CA Residents: Prop 65 Warning(s) | No | GREENGUARD Gold Certified | No |
ENERGY STAR Certified | Yes | Fire Rating | Class A |
Warranty | |||
|---|---|---|---|
Warranty | 30-year limited | ||
Compatibility | |||
|---|---|---|---|
For Use in Basements | Yes | For Use in Floors | No |
For Use in Crawlspaces | Yes | For Use in Garage Doors | No |
For Use on Plastic | Yes | For Use in Masonry | Yes |
For Use on Metal | Yes | 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 cutting with basic tools like utility knives and cordless saws, producing clean precise cuts without debris. Most highlight its effective insulation performance, blocking heat and cold reliably in garages, attics, and trailers with high R-value. Reviewers appreciate its lightweight yet sturdy construction, versatility across diverse applications from model building to protective backing, and ability to conform to irregular surfaces without warping. A few note concerns about thickness for heavy outdoor use or availability, but these isolated issues do not diminish the strong overall satisfaction with core functionality and performance.
Customer review summary generated by AI, including incentivized reviews.Good
From Residential Sheathing R- 2.75 , 0.55-in x 4-ft x 8-ft Faced Polystyrene Board Insulation Verified Purchaser
easy to use
good product
From Residential Sheathing R- 2.75 , 0.55-in x 4-ft x 8-ft Faced Polystyrene Board Insulation Verified Purchaser
Great for outdoor decorations
We use this product for outdoor decorations. Very durable and easy to cut.
From Residential Sheathing R- 3.9 , 0.78-in x 4-ft x 8-ft Faced Polystyrene Board Insulation Verified Purchaser
Works
Local
From Residential Sheathing R- 3.9 , 0.78-in x 4-ft x 8-ft Faced Polystyrene Board Insulation Verified Purchaser
Good quality
Very sturdy and reliable
From Residential Sheathing R- 3.9 , 0.78-in x 4-ft x 8-ft Faced Polystyrene Board Insulation Verified Purchaser
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