SKU: 4314077904

Owens Corning R-15 (40 PSI) FOAMULAR NGX 400 Extruded Polystyrene Foam Board Insulation, 3 in x 4 ft x 8 ft, Square Edge

Sale price$172.35 Regular price$191.50
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Ships within 48 hours · Estimated delivery Jul 31 - Aug 5

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For Your Every Summer RSVP, with Code: SUMMER15

Description

Owens Corning R-15 (40 PSI) FOAMULAR NGX 400 Extruded Polystyrene Foam Board Insulation, 3 in x 4 ft x 8 ft, Square EdgeFOAMULAR NGX 400 R 15 XPS Foam Board, 3 in x 4 ft x 8 ft High performance extruded polystyrene (XPS) foam board delivering R 15 thermal resistance in a 3 inch panel. Engineered for moisture resistance and durability with 40 PSI compressive strength, ideal for walls, sheathing, and commercial applications. Key Features: High R Value: R 5 per inch delivers R 15 in a 3 inch panel for energy efficiency Moisture Resistant: Low water absorption helps retain

FOAMULAR NGX 400 R-15 XPS Foam Board, 3 in x 4 ft x 8 ft

High-performance extruded polystyrene (XPS) foam board delivering R-15 thermal resistance in a 3-inch panel. Engineered for moisture resistance and durability with 40 PSI compressive strength, ideal for walls, sheathing, and commercial applications.


Key Features:

  • High R-Value: R-5 per inch delivers R-15 in a 3-inch panel for energy efficiency
  • Moisture Resistant: Low water absorption helps retain R-value in damp conditions
  • Strong & Lightweight: 40 PSI compressive strength; easy to cut and install
  • Versatile Use: Suitable for exterior and interior foundation walls, exterior sheathing, cavity walls, and commercial applications
  • Sustainable Blowing Agent: NGX technology reduces global warming potential vs. legacy XPS

Specifications Table:

Specification Details
Series Name FOAMULAR NGX F-400
Actual Length (Feet) 8
Actual Thickness (Inches) 3
Actual Width (Feet) 4
Coverage Area (Sq. Feet) 32
Compressive Strength 40 PSI
Faced/Unfaced Unfaced
Insulation Type Polystyrene (XPS)
Maximum R-Value 15
R-Value per Inch 5
Mold Resistant Yes
Water Resistant Yes
Fire Resistant No
Sound Barrier No
Use Location Outdoor
For Use in Walls Yes
For Use on Wood Yes
Formaldehyde Free Yes
ENERGY STAR Certified Yes
GREENGUARD Gold Certified Yes
Warranty Limited lifetime
Package Quantity 1
Package Weight (lbs.) 15.1

Frequently Asked Questions (FAQ):

Q: Can this insulation be used on exterior sheathing?
A: Yes, it is suitable for exterior sheathing, foundation walls, cavity walls, and commercial applications.


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


Q: What is the R-value per inch?
A: R-5 per inch; the 3-inch panel provides R-15.


Q: Does it resist mold and mildew?
A: Yes, it is mold/mildew resistant with excellent moisture resistance.


Q: Is special tooling required to cut it?
A: No, panels are lightweight and easy to cut with standard tools.


Sculptural Warmth Meets Industrial Strength

This sleek pink board brings modern performance to the envelope of your home, streamlining thermal comfort with a polished, architectural presence. The squared edges and 3-inch profile create crisp lines that layer beautifully behind cladding, supporting a clean, tailored aesthetic. Style it as continuous exterior insulation to elevate energy efficiency and reduce thermal bridging—smart luxury you can feel. A refined essential for resilient, high-design living.


Upgrade your envelope with FOAMULAR NGX 400 and lock in R-15 performance—add to cart today.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 4314077904

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Amazon Customer
New York, US
★★★★★ 5
So just use it in the long run you’ll love it
Style: Full Synthetic High Mileage, Size: 5 qt (Pack of 1), Configuration: 5W-30
The best quality , compatible with any engine advanced synthetic oil. Great value for the money it will save you money in the future. The fit is great easy to pour. The color is beautiful amber gold. I’ve been using Valvoline oil for 48 years. I’ve been a mechanic for 48 years and if you take apart an engine that has been using it , it is clean inside. If you take apart an engine that has been using a different brand they have a tar like build up in them. Like the old commercial use to say mechanics that know use only valvoline oil.
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Reviewed in the United States on May 27, 2026
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Milo
Chelsea, US
★★★★★ 5
Good Oil and Great Price
Style: Full Synthetic High Mileage, Size: 5 qt (Pack of 1), Configuration: 0W-20
I get this oil for my daughter’s 2016 Corolla. It’s such a great price compared to auto part store. I do hope it’s the same quality as I get elsewhere! It seems to be a quality oil for my daughter’s 4cyl Corolla.
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Reviewed in the United States on June 1, 2026
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Alan 77
Battle Creek, US
★★★★★ 5
Works well
Style: Full Synthetic High Mileage, Size: 5 qt (Pack of 1), Configuration: 10W-30
I really like Valvaline oil for my vehicle, have for years
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Reviewed in the United States on May 30, 2026
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Howard
Port Orchard, US
★★★★★ 5
There’s oil in those yarn Hills!
Style: Full Synthetic High Mileage, Size: 1 qt (Pack of 1), Configuration: 5W-20
It’s great oil at a fair price. The shipping was expeditious and glad it was.
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Reviewed in the United States on May 22, 2026
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Robert
Louisville, US
★★★★★ 5
Great value, cheaper than local.
Style: Full Synthetic High Mileage, Size: 5 qt (Pack of 1), Configuration: 0W-20
Good value, fast shipping, Valvoline quality.
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Reviewed in the United States on May 16, 2026

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