Owens Corning FOAMULAR 400 (40 PSI) R-15 Extruded Polystyrene Foam Board Insulation, 3 in x 4 ft x 8 ft, Square Edge
Regular price $191.50FOAMULAR 400 R-15 XPS Foam Board, 3" x 4' x 8'
High-performance extruded polystyrene (XPS) foam board delivering R-15 insulation in a durable 3-inch panel. Designed for high-load applications and exterior sheathing, it resists moisture and is easy to cut and install.
Key Features:
- High Compressive Strength: 400 series XPS rated at 40 PSI for demanding applications
- Moisture Resistant: Low water absorption helps retain R-value over time
- Energy Efficient: R-5 per inch delivers R-15 in a 3-inch board
- Easy to Work With: Lightweight panels cut cleanly with basic tools
- Versatile Use: Suitable for exterior foundation walls, sheathing, cavity walls, and commercial projects
Specifications Table:
| Specification | Details |
|---|---|
| Series Name | FOAMULAR NGX F-400 |
| Actual Length (Feet) | 8 |
| Actual Thickness (Inches) | 3 |
| Actual Width (Feet) | 4 |
| Common Length (Feet) | 8 |
| Common Thickness (Inches) | 3 |
| Common Width (Feet) | 4 |
| Coverage Area (Sq. Feet) | 32 |
| Package Weight (lbs.) | 15.1 |
| Faced/Unfaced | Unfaced |
| Fire Resistant | No |
| For Use in Walls | Yes |
| For Use on Wood | Yes |
| Formaldehyde Free | Yes |
| Insulation Type | Polystyrene (XPS) |
| Maximum R-Value | 15 |
| Mold Resistant | Yes |
| Package Quantity | 1 |
| R-Value per Inch | 5 |
| Sound Barrier | No |
| Use Location | Outdoor |
| Vapor Retardant | No |
| Water Resistant | Yes |
| ENERGY STAR Certified | Yes |
| GREENGUARD Gold Certified | Yes |
| Warranty | Limited lifetime |
| Compressive Strength | 40 PSI |
Frequently Asked Questions (FAQ):
Q: Can this board be used below grade or under slabs?
A: Yes—FOAMULAR 400 is intended for high-load applications including exterior foundation walls and under slabs; follow local codes.
Q: Does it come faced or unfaced?
A: Unfaced XPS foam board.
Q: What are the exact dimensions and coverage?
A: Each board is 3 in thick, 4 ft wide, and 8 ft long, covering 32 sq ft.
Q: Is it mold or mildew resistant?
A: Yes, XPS construction provides mold and mildew resistance.
Q: What is the R-value?
A: R-15 total (R-5 per inch).
Sculpted Strength Meets Sleek Thermal Performance
This streamlined pink panel brings architectural confidence to utility spaces, sealing envelopes with crisp, modern precision. The 3-inch profile and square edges create a clean, continuous plane that elevates foundations and sheathing alike. Pair it with exposed concrete and black hardware for an industrial-chic moment that’s as functional as it is refined. It’s an essential layer for luxurious comfort and enduring efficiency.
Upgrade your envelope with FOAMULAR 400 and lock in long-lasting R-15 performance—add to cart today.
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