SKU: 4660028124

Owens Corning FOAMULAR 250 (25 PSI) R-15 XPS Foam Board Insulation, 3 in. x 4 ft. x 8 ft., Square Edge

Sale price$116.89 Regular price$129.88
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Ships within 48 hours · Estimated delivery Jul 15 - Jul 20

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For Your Every Summer RSVP, with Code: SUMMER15

Description

Owens Corning FOAMULAR 250 (25 PSI) R-15 XPS Foam Board Insulation, 3 in. x 4 ft. x 8 ft., Square EdgeFOAMULAR 250 R 15 XPS Foam Board, 3" x 4' x 8' Rigid extruded polystyrene (XPS) foam board with 25 PSI compressive strength delivers R 15 thermal performance in a 3 inch panel. Durable, moisture resistant board for foundations, sheathing, under slab and cavity walls; easy to score, snap, and install. Key Features: High R Value: R 15 at 3 inches for strong thermal resistance Durable Strength: 25 PSI compressive strength handles jobsite loads Moisture

FOAMULAR 250 R-15 XPS Foam Board, 3" x 4' x 8'

Rigid extruded polystyrene (XPS) foam board with 25 PSI compressive strength delivers R-15 thermal performance in a 3-inch panel. Durable, moisture-resistant board for foundations, sheathing, under-slab and cavity walls; easy to score, snap, and install.


Key Features:

  • High R-Value: R-15 at 3 inches for strong thermal resistance
  • Durable Strength: 25 PSI compressive strength handles jobsite loads
  • Moisture Resistant: XPS core resists water absorption to retain R-value
  • Easy to Work With: Lightweight panels score and snap cleanly; no special tools needed
  • Versatile Use: Suitable for exterior/interior foundation walls, sheathing, under slab, and cavity walls
  • *Special order item

Please check the Product Data Sheet Here


Specifications Table:

Specification Details
Insulation Type XPS (Extruded Polystyrene) Rigid Foam Board
Compressive Strength 25 PSI
R-Value R-15
Thickness 3 in
Width 48 in
Length 96 in (8 ft)
Coverage Area 32 sq ft per board
Edges Square Edge; scored
Faced or Unfaced Unfaced
Compatible Install Surface Concrete, Plywood, Wood
Interior/Exterior Interior/Exterior
Insulation Features Formaldehyde Free, Moisture Retardant, Mold Resistant, Water Resistant
Number of Pieces 1
Pack Size 1
Warranty Limited Lifetime

Frequently Asked Questions (FAQ):

Q: Can this be used below grade or under a slab?
A: Yes—FOAMULAR 250 XPS is rated for below-grade applications including exterior foundation walls and under-slab use.


Q: Is the board faced or unfaced?
A: Unfaced XPS; a separate thermal barrier like drywall is required when left exposed indoors.


Q: What are the panel dimensions and coverage?
A: Each panel measures 3 in. thick x 48 in. wide x 96 in. long and covers 32 sq. ft.


Q: What tools are needed to cut it?
A: Score with a utility knife and snap; no special tools required.


Q: Is it mold or moisture resistant?
A: Yes—XPS resists moisture absorption and is mold resistant, helping maintain thermal performance.


Sculpted Thermal Armor for Modern Envelopes

This crisp, pink XPS panel brings a tailored precision to walls and foundations, creating a seamless thermal envelope that feels intentional and refined. The standout is its confident 3-inch profile—R-15 performance with a sleek, square edge that lines up beautifully. Pair it with clean-detailed cladding and polished concrete for a minimalist, high-performance shell. It’s an essential layer of quiet luxury, where form meets formidable function.


Upgrade your envelope with FOAMULAR 250 and lock in durable, R‑15 performance—add to cart and start insulating today.

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: 4660028124

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mike litchfield
Grantham, US
★★★★★ 5
Works great
Is there a little expensive but they work great to add counter space. My wife liked it so much I bought a second one.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 11, 2026
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Placeholder
Houston, US
★★★★★ 4
Looks great.
Nice quality with sturdy hardware. Size could be a little larger.
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Reviewed in the United States on August 30, 2025
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Stephanie Adams
Cuba, US
★★★★★ 5
Great addition to my sewing table!
I ordered two of these to give me a little more room on my sewing table. One for the backside and one for the left side. Worked out great! Very sturdy and not hard to install (followed directions). I just extended when I need room and fold when not in use. I would recommend these to anyone who just needs a little more table/room.
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Reviewed in the United States on May 12, 2020
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Verified Purchase
Melanie Miguelgorry
Houston, US
★★★★★ 3
Not very sturdy
The oak that this is made of is very nice. The little bit of extra counter space is nice. The problem is the bracket to hold it up is kind of small and flimsy, so the shelf won't bear much weight. It will be ok for putting light things on. Also had a problem getting it to hang flat in the down position.
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Reviewed in the United States on February 22, 2022
C
Verified Purchase
curtiskuhr
Cuba, US
★★★★★ 5
A good product at a good price. this is easy to install, and very sturdy.
This will expand our counter space in our camper, it is very sturdy and well built, solid wood, and a nice hinge.
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Reviewed in the United States on December 13, 2023

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