R-7.5 FOAMULAR XPS Tongue & Groove Foam Board (1-1/2 in. x 4 ft. x 8 ft.)

Rigid XPS foam board designed for exterior sheathing and foundation walls, delivering R-7.5 thermal performance at 1-1/2 in. thickness. Moisture-resistant, lightweight panels with tongue & groove edges for a tight fit and easy installation.

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Key Features:

• High R-Value Performance: R-7.5 at 1-1/2 in. thickness for strong thermal protection
• Moisture Resistance: XPS construction helps retain R-value even in damp conditions
• Durable Strength: 25 PSI compressive strength for robust sheathing applications
• Easy Handling: Lightweight panels cut and install quickly with basic tools
• Tongue & Groove Edge: Boards interlock to reduce air gaps and improve insulation continuity

Please check the Product Data Sheet Here

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Specifications Table:

Specification	Details
Insulation Type	Extruded Polystyrene (XPS) Foam Board
Model	FOAMULAR 250
Edge Type	Tongue & Groove
Faced/Unfaced	Unfaced
R-Value	R-7.5
Compressive Strength	25 PSI
Dimensions	1-1/2 in. thickness x 4 ft. width x 8 ft. length
Coverage Area	32 sq ft per board
Compatible Install Surface	Plywood, Wood
Interior/Exterior	Exterior
Sheathing Type	XPS
Product Weight	6.7 lb
Warranty	Limited Lifetime
Number of Pieces	1
Pack Size	Varies; commonly 8 (check retailer)

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Frequently Asked Questions (FAQ):

Q: Can this foam board be used on exterior walls?
A: Yes—commonly used for exterior wall sheathing and foundations; verify local code requirements for vapor barriers and coverings.

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Q: Do the panels need to be covered?
A: Yes—FOAMULAR NGX cannot be left exposed; cover with a 15‑minute thermal barrier such as drywall when required.

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Q: What are the panel dimensions and coverage?
A: Each board is 1-1/2 in. thick, 4 ft. wide, and 8 ft. long, covering 32 sq. ft.

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

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Q: What is the compressive strength?
A: 25 PSI (FOAMULAR 250).

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Seamless Thermal Armor with a Sleek, Modern Edge

This crisp, pink XPS board slips into a build like couture—clean lines, interlocking edges, and disciplined performance. The tongue‑and‑groove detail is the standout, creating a seamless plane that elevates both energy efficiency and the craft of the envelope. Use it to sculpt a tight, high‑performing exterior shell before layering finishes, letting the structure feel intentional and refined. It’s a quiet essential for luxurious comfort and a polished architectural presence.

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Upgrade your envelope with FOAMULAR R-7.5 tongue & groove boards and lock in lasting energy savings today.

Warranty

Installation