Owens Corning FOAMULAR 250 (25 psi) R-20 XPS Foam Board Insulation, 4 in. x 4 ft. x 8 ft., Square Edge
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; HFC‑134a 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 15‑minute 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 next‑generation blowing agent with >80–90% reduction in global warming potential versus legacy FOAMULAR formulations.
Sculpted Thermal Armor in Signature Pink
This sleek, square‑edge XPS panel wraps a space in quiet confidence, delivering crisp lines and a flush fit that feels thoughtfully engineered. I love the bold pink surface—an unexpected pop during construction that signals performance and polish. Layer it behind refined cladding or concrete to create a home that’s warm, dry, and impeccably detailed. It’s a discreet essential—practical luxury that underpins elevated living.
Upgrade your envelope with FOAMULAR 250 and lock in long‑lasting R‑20 performance—add it to your project today.
Original: $111.42
-70%$111.42
$33.43Product Information
Product Information
Shipping & Returns
Shipping & Returns
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; HFC‑134a 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 15‑minute 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 next‑generation blowing agent with >80–90% reduction in global warming potential versus legacy FOAMULAR formulations.
Sculpted Thermal Armor in Signature Pink
This sleek, square‑edge XPS panel wraps a space in quiet confidence, delivering crisp lines and a flush fit that feels thoughtfully engineered. I love the bold pink surface—an unexpected pop during construction that signals performance and polish. Layer it behind refined cladding or concrete to create a home that’s warm, dry, and impeccably detailed. It’s a discreet essential—practical luxury that underpins elevated living.
Upgrade your envelope with FOAMULAR 250 and lock in long‑lasting R‑20 performance—add it to your project today.
