Product Detail

Description

FOAMULAR 250 R-20 XPS Foam Board, 4x4x8, Square Edge

High-performance extruded polystyrene (XPS) rigid foam board delivering R-20 thermal resistance in a 4 in. thickness. Designed for interior/exterior walls, foundations, and sheathing, it offers 25 psi compressive strength with excellent moisture resistance and easy score-and-snap installation.

Key Features:

High R-Value: R-20 thermal resistance at 4 in. thickness for strong energy savings
Durable Strength: 25 psi compressive strength handles foundation and wall loads
Moisture Resistant: XPS core resists water absorption to help maintain R-value
Easy to Work With: Lightweight board scores and snaps cleanly for quick installs
Versatile Use: Suitable for basements, exterior sheathing, cavity walls, and below slabs

Please check the Product Data Sheet Here

Specifications Table:

Specification	Details
Insulation Type	XPS Rigid Foam Board (Extruded Polystyrene)
Series	FOAMULAR NGX 250
Compressive Strength	25 psi
R-Value	R-20
Thickness	4 in.
Width	48 in.
Length	8 ft (96 in.)
Coverage Area	32 sq ft per board
Edge Profile	Square Edge
Faced or Unfaced	Unfaced
Compatible Install Surface	Concrete, Plywood, Wood
Interior/Exterior	Interior/Exterior
Insulation Location	Basement, Exterior Sheathing, Interior Wall; Below slabs; Crawl spaces
Insulation Features	Formaldehyde Free, Moisture Retardant, Mold Resistant, Water Resistant
Number of Pieces	1
Pack Size	1
Product Weight (lb.)	18 lb
Warranty	Limited Lifetime
Environmental Note	>80% reduction in global warming potential vs. legacy FOAMULAR; HFC134a eliminated
Certifications	GREENGUARD Certified; Listed in ENERGY STAR Seals and Insulates program

Frequently Asked Questions (FAQ):

Q: Can this foam board be used below grade or under slabs?
A: Yes. It is suitable for foundation walls, basements/crawl spaces, and below slabs; check local codes for required coverings and vapor control.

Q: Does it need to be covered when left exposed indoors?
A: Yes. It cannot be left exposed and must be covered by a 15minute thermal barrier such as drywall.

Q: Is the board faced or unfaced?
A: Unfaced XPS rigid foam board.

Q: What are the board dimensions and coverage?
A: Each board is 4 in. thick, 48 in. wide, and 8 ft. long, covering 32 sq. ft.

Q: What is the environmental profile of NGX?
A: Manufactured with a nextgeneration blowing agent with >8090% reduction in global warming potential versus legacy FOAMULAR formulations.

Sculpted Thermal Armor in Signature Pink

This sleek, squareedge XPS panel wraps a space in quiet confidence, delivering crisp lines and a flush fit that feels thoughtfully engineered. I love the bold pink surfacean unexpected pop during construction that signals performance and polish. Layer it behind refined cladding or concrete to create a home thats warm, dry, and impeccably detailed. Its a discreet essentialpractical luxury that underpins elevated living.

Upgrade your envelope with FOAMULAR 250 and lock in longlasting R20 performanceadd it to your project today.

Warranty

Installation

Owens Corning FOAMULAR 250 (25 psi) R-20 XPS Foam Board Insulation, 4 in. x 4 ft. x 8 ft., Square Edge

$55.71