FOAMULAR NGX 250 R-20 XPS Rigid Foam Board (4 in. x 48 in. x 96 in.)

Owens Corning FOAMULAR NGX 250 is a closed-cell XPS rigid foam insulation board designed for strong, moisture-resistant thermal performance. The 4 in. square-edge panel delivers R-20 insulation for a wide range of residential and commercial applications, including foundation walls, exterior sheathing, and under-slab use.

Key Features:

• Moisture-Resistant XPS Foam: Closed-cell extruded polystyrene helps resist water absorption for reliable performance in demanding areas like foundations and slabs.
• High Insulating Value: R-20 performance in a 4-inch board helps improve comfort and energy efficiency.
• Strong & Durable: FOAMULAR NGX 250 is designed for jobsite toughness and 25 psi compressive strength applications.
• Easy to Cut & Fit: Lightweight rigid board cuts and shapes easily for a precise fit around edges and penetrations.
• Next-Gen Sustainability: NGX formulation is designed to reduce Global Warming Potential (GWP) versus prior-generation foam.

Please check the Product Data Sheet Here

Specifications Table:

Frequently Asked Questions (FAQ):

Q: What is the coverage per board?
A: One 48 in. x 96 in. board covers 32 sq ft.

Q: What applications is this board commonly used for?
A: Its commonly used for exterior and interior foundation walls, exterior sheathing, cavity walls, and other residential/commercial insulation applications (including below-grade uses when installed per local code).

Q: What R-value and thickness is this product?
A: R-20 at 4 inches thick.

Q: Is this insulation moisture resistant?
A: YesFOAMULAR NGX is a closed-cell XPS board designed for superior moisture resistance.

Q: Can I cut it with common tools?
A: Yesit’s designed to be easy to cut, shape, and handle for fitting and installation.

A Clean, Quiet Layer of ComfortHidden, but Transformative

Great design begins with what you dont see: a calm, consistent envelope that makes a space feel effortless. FOAMULAR NGX 250 brings a sleek, architectural confidence to the buildrigid, precise, and moisture-resistant for those foundation and wall moments that demand performance. Use it to refine the thermal layer behind minimalist finishes so the room reads serene, not drafty. Its the kind of behind-the-scenes essential that elevates everyday living into something quietly luxurious.

Upgrade your building envelope with FOAMULAR NGX 250 for durable, moisture-resistant R-20 performance where it matters most.

Warranty

Installation