Name: Owens Corning FOAMULAR NGX F-250 R- 10 , 2-in x 4-ft x 8-ft Unfaced Polystyrene Board Insulation
Brand: Owens Corning
SKU: 5005553115
Rating: 4.7 (156 reviews)

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Owens Corning FOAMULAR NGX (Next Generation Extruded) insulation, is produced with a proprietary blowing agent that delivers a 90% reduction to Global Warming Potential (100 year) compared to current FOAMULAR. The new formulation and production process meets or exceeds new, more stringent regulatory standards without sacrificing product performance and offers a comprehensive line of products in a wide choice of sizes, thicknesses and edges with a Lifetime limited warranty for the life of the home or building. The products are easy to handle, score, cut and install and no special tools are needed. Products can be used on wood, steel framing or concrete walls. FOAMULAR NGX resists moisture and retains R-value even after exposure to standing water and wet soil. Owens Corning FOAMULAR NGX insulation offers all the physical properties and ease-of-use you expect from Owens Corning FOAMULAR insulation with industry-leading sustainability.

Saves energy and resists moisture with limited lifetime warranty
Blocks mildew, corrosion and rot; easy to cut and install
Strong, lightweight pink foam panels don't require special tools

General
Series Name	FOAMULAR NGX F-250	Compression Strength (PSI)	25
Package Quantity	1	Edge Profile	Scored Square Edge
Use Location	Indoor/Outdoor	Paintable	No
Insulation Type	Polystyrene

Dimensions
Actual Length (Feet)	8	Common Width (Feet)	4
Actual Thickness (Inches)	2	Coverage Area (Sq. Feet)	32
Actual Width (Feet)	4	Package Weight (lbs.)	7.5
Common Length (Feet)	8	R-Value per Inch	5
Common Thickness (Inches)	2	Maximum R-Value	10

Features
Fire Resistant	No	Water Resistant	Yes
Formaldehyde Free	Yes	Sound Insulation	No
Mold Resistant	Yes	Facing Material	Unfaced
Sound Barrier	No	Pre-Cut	Yes
Vapor Retardant	Yes

Certifications
CA Residents: Prop 65 Warning(s)	No	GREENGUARD Gold Certified	Yes
ENERGY STAR Certified	Yes	Fire Rating	Class A

Warranty
Warranty	Limited lifetime

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	No	For Use in Masonry	No
For Use on Metal	No	For Use in Plumbing	No
For Use on Wood	Yes	For Use in Vents	No
For Use in Ceilings	No	For Use in Walls	Yes
For Use on Insulation	No	For Use in Windows	No
For Use in Attics	No	Fits 2 x 4 Walls	No
For Use in Doors	No	Fits 2 x 6 Walls	No
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

Review

4.7 out of 5

156 Reviews

94% Recommend this product

Ratings may include incentivized customer reviews.

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+ 10

What Customers Are Saying

Customers overwhelmingly praise the foam board for exceptional ease of cutting with basic tools like utility knives and saws, producing clean, precise results. Reviewers consistently report excellent insulation performance in walls, ceilings, trailers, and garage doors, with accurate R-values and effective heat and noise reduction. Many appreciate its lightweight durability, ability to support significant weight, and versatility—it's sandable, paintable, and drillable for crafts, props, and custom projects. A few note fragility if bent or mishandled during transport, though most consider these minor concerns. Overall, customers strongly recommend it for both beginners and experienced DIYers.

Customer review summary generated by AI, including incentivized reviews.

156 Customer Reviews

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FOAMULAR NGX F-150 R- 5 , 1-in x 4-ft x 8-ft

Would Recommend

I bought the insulation to insulate two garage door during the hot summer in Tucson, the FOAMULAR NGX F-150 R- 5 worked great!

DukeAugust 29, 2026
From FOAMULAR NGX F-150 R- 5 , 1-in x 4-ft x 8-ft Unfaced Polystyrene Board Insulation Verified Purchaser

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Great option for cutting and routing

Would Recommend

I use this to protect my workbench top when cutting plywood and other wood with my track saw. Also great for supporting plywood panels when routing circles and half circles. Saw blades and router bits cut into poly board smoothly and it helps reduce tear out.

Willy BAugust 12, 2026

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Great sacrificial cutting surface for a track saw

Would Recommend

These foam sheets make a great lightweight cutting surface for using a track saw to cut up sheet goods. The track saw and foam insulation board combo has been a game changer for building cabinets in my very small garage workshop

SeattleMade26July 12, 2026
From FOAMULAR NGX F-150 R- 5 , 1-in x 4-ft x 8-ft Unfaced Polystyrene Board Insulation Verified Purchaser

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		Name	Current Item Owens CorningFOAMULAR NGX F-250 R- 10 , 2-in x 4-ft x 8-ft Unfaced Polystyrene Board Insulation
		Ratings	156
		Water Resistant
		Maximum R-Value	10
		Insulation Type	Polystyrene
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