Owens Corning FOAMULAR 400 R-10 XPS Foam Board Insulation, 2 in x 4 ft x 8 ft, Square Edge (40 psi)
SKU: 39896880911

Owens Corning FOAMULAR 400 R-10 XPS Foam Board Insulation, 2 in x 4 ft x 8 ft, Square Edge (40 psi)

Sale price$61.66 Regular price$68.51
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Description

Owens Corning FOAMULAR 400 R-10 XPS Foam Board Insulation, 2 in x 4 ft x 8 ft, Square Edge (40 psi)FOAMULAR 400 R 10 XPS Foam Board, 2" x 4' x 8' High performance extruded polystyrene (XPS) insulation board with 40 psi compressive strength for heavy load applications. Offers R 10 thermal resistance at 2 inch thickness and square edges for flush installs. Key Features: High Compressive Strength: 40 psi for under slab, foundation, and commercial roof applications Energy Efficient: R 10 thermal resistance at 2 inch thickness helps reduce heat loss

FOAMULAR 400 R-10 XPS Foam Board, 2" x 4' x 8'

High-performance extruded polystyrene (XPS) insulation board with 40 psi compressive strength for heavy-load applications. Offers R-10 thermal resistance at 2-inch thickness and square edges for flush installs.


Key Features:

  • High Compressive Strength: 40 psi for under-slab, foundation, and commercial roof applications
  • Energy Efficient: R-10 thermal resistance at 2-inch thickness helps reduce heat loss
  • Moisture Resistant: XPS core retains R-value even in wet conditions
  • Easy to Work With: Lightweight panels score, snap, and cut cleanly without special tools
  • Sustainable NGX Formulation: Blowing agent designed to significantly reduce global warming potential

Please check the Product Data Sheet Here


Specifications Table:

Specification Details
Insulation Type XPS Rigid Foam Board
Compressive Strength 40 psi (FOAMULAR 400)
R-Value R-10
Thickness 2 in
Width 48 in
Length 8 ft
Coverage Area 32 sq ft per board
Compatible Install Surface Concrete, Plywood, Wood
Faced or Unfaced Unfaced
Insulation Location Exterior sheathing, exterior wall foundation, under slab
Interior/Exterior Exterior (must be covered if used indoors)
Number of Pieces 1
Pack Size 1
Product Weight 10 lb
Warranty Limited Lifetime
Features Formaldehyde-free; Moisture retardant; Mold resistant; Water resistant
Edge Type Square Edge
Material Extruded Polystyrene (XPS)

Frequently Asked Questions (FAQ):

Q: Can this board be used below grade or under slabs?
A: Yes—commonly used for exterior foundation walls and under-slab applications due to its 40 psi compressive strength and moisture resistance.


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


Q: What surfaces is it compatible with?
A: Concrete, wood, and plywood.


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


Q: What are the panel dimensions and coverage?
A: Each board is 2 in thick, 48 in wide, and 8 ft long, covering 32 sq ft.


Sculpted Strength, Modern Warmth

This XPS board brings precision and pink-hued confidence to high-performance builds. Its crisp square edge and slim 2-inch profile glide into tight assemblies, delivering steadfast insulation without bulk. Use it to create a clean, continuous thermal layer behind cladding or beneath polished concrete for a seamless envelope. It’s a quiet essential—powerfully functional and undeniably refined.


Upgrade your envelope with FOAMULAR 400 and lock in durable, R-10 energy savings for your next project.

Warranty

Installation

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: 39896880911

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Miss M suggestions
Grantham, US
★★★★★ 5
Good buy
Color: Rechargeable Set with Base
I bought these for my son and his wife for Christmas this year. He loves them and uses them regularly. Super good looking, easy charging. Nice flow of ground salt and pepper. I have seen him using them while cooking so I asked what he thought.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2026
M
Verified Purchase
Marty
Houston, US
★★★★★ 5
Everyone Loves My Electric Salt & Pepper Grinder Set!
Color: Rechargeable Set with Base
Very nice looking grinder set. Rechargeable is the only way to go. They function with ease. I Love that I can easily adjust the size of the grind for both the salt & pepper. It is also nice to have a holder for them to keep counters clean. My family and friends have ask me to send them them the Amazon link so that they can purchase a set for themselves.
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Reviewed in the United States on March 5, 2026
C
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Christopher Shipp
New York, US
★★★★★ 5
Great Product!
Color: Rechargeable Set with Base
Works as expected. Truly happy with the price and durability so far.
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Reviewed in the United States on March 17, 2026
S
Verified Purchase
Sheila Harricharan
Port Orchard, US
★★★★★ 4
Good pepper grinder
Color: Rechargeable Set with Base
Good grinding capabilities. When I use for salt ,it drips every where . Only suitable for pepper
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Reviewed in the United States on September 11, 2025
S
Verified Purchase
SRS
Birmingham, US
★★★★★ 5
quick set up
Color: Rechargeable Set with Base
So far, 2 weeks, it was easy to fill, charged quickly, looks lovely, easy adjustment on the course to fine dial, great value, so far. and mush less clutter-y than the four different items I had to use to get both fine and course grands. Light weight and it appears to be built to last.
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Reviewed in the United States on October 25, 2025

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