Owens Corning
Owens Corning FOAMULAR 250 XPS Insulation Board - All Sizes
Owens Corning FOAMULAR 250 XPS Insulation Board - All Sizes
SKU:OWCFOAM2503/4In
Est Delivery between 6th Feb and
12th Feb.
The option you have selected may be in short supply. To make an enquiry please call us on 786-224-0029 or email us at sales@4us-group.com.
How much will I need?
We recommend adding 10% of additional product to the calculation to account for errors, damages, and obstacles in your project


Product Information
Please Note We Can Not Ship To The Following States: California, Colorado, Connecticut, Delaware, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Rhode Island, Vermont, Virginia, Washington
Owens Corning FOAMULAR 250 Extruded Polystyrene (XPS) Insulation is a closed-cell, moisture-resistant rigid foam board well suited to meet the needs for a wide variety of building applications. FOAMULAR 250 XPS insulation board is great for many residential and commercial construction applications such as wall furring, perimeter/foundation, cavity wall, pre-cast concrete, under a slab, crawl spaces, sheathing, and other applications.
Thickness | Sq Ft Per Board | R-Value |
---|---|---|
0.75" | 32 Sq Ft | R4 |
1" | 32 Sq Ft | R5 |
1.5" | 32 Sq Ft | R7.5 |
2" | 32 Sq Ft | R10 |
2.5" | 32 Sq Ft | R12.5 |
3" | 32 Sq Ft | R15 |
4" | 32 Sq Ft | R20 |
Features
- Excellent long-term stable insulating performance at R-5 per inch
- Exceptional moisture resistance, long-term durability
- Lightweight, durable rigid foam panels are easy to handle and install
- Easy to saw, cut or score
- Scored Square Edge
Applications
- Slows the transmission of water vapor and moisture in masonry walls
- Provides continuous insulation over wood or steel stud framing, in insulated concrete sandwich panel walls, in masonry unit cavity walls, or when used with non-penetrating, surface mounted furring systems over masonry or concrete walls
- Insulates and retains its properties in below-grade perimeter and foundation applications, or directly beneath the concrete slab to complement the insulating sheathing envelope around the building framing
- FOAMULAR 250 XPS insulation is great for below-grade applications
- FOAMULAR XPS insulation is resistant to degradation from the components of common soils and will retain its insulating performance characteristics even after prolonged exposure to moisture
- Extruded Polystyrene Provides a weather-resistant barrier (when joints are sealed) to enhance the building’s resistance to air and moisture penetration
Frequently Asked Questions
What is the R-value of FOAMULAR® 250 XPS insulation? FOAMULAR® 250 XPS insulation has an excellent long-term stable insulating performance at R-5 per inch.
Can FOAMULAR® 250 XPS insulation be used in below-grade applications? Yes, FOAMULAR® 250 XPS insulation is great for below-grade applications. It is resistant to degradation from common soil components and retains its insulating performance even after prolonged exposure to moisture.
What is the maximum service temperature of FOAMULAR® XPS insulation? FOAMULAR® XPS insulation has a maximum service temperature of 165°F.
Do I need to use a vapor retarder with FOAMULAR® XPS insulation? All construction should be evaluated for the necessity to provide vapor retarders. Consult the current ASHRAE Handbook of Fundamentals for more information.
What applications is FOAMULAR® 250 XPS insulation suitable for? FOAMULAR® 250 XPS insulation is great for a variety of residential and commercial construction applications such as wall furring, perimeter/foundation, cavity wall, pre-cast concrete, under slab, crawl spaces, sheathing, and more.
Does FOAMULAR® 250 XPS insulation provide a weather-resistant barrier? Yes, when the joints are sealed, FOAMULAR® 250 XPS insulation provides a weather-resistant barrier that enhances the building's resistance to air and moisture penetration.
Other XPS Products:
Dow XPS 150 Blue Board: This product offers a lower compressive strength compared to FOAMULAR® 250, making it suitable for applications where less strength is required.
Kingspan GreenGuard LG Type IV 25 PSI: This insulation board is designed for general-purpose insulation, providing excellent thermal performance and moisture resistance.
Kingspan GreenGuard LG Type VII 60 PSI XPS Insulation Board (4ft x 8ft): With a higher compressive strength, this product is ideal for applications requiring extra load-bearing capabilities.
Kingspan GreenGuard LG Type VII 60 PSI XPS Insulation Board (2ft x 8ft): Similar to the 4ft x 8ft version, this smaller size offers the same high compressive strength for versatile use.
Dow XPS 250 Blue Board: This product is comparable to the FOAMULAR® 250 XPS insulation, offering similar insulating performance and moisture resistance.
Kingspan GreenGuard LG Type VI 40 PSI XPS Insulation Board: This insulation board provides a balance between strength and thermal performance, making it suitable for a range of applications.
Owens Corning FOAMULAR NGX 250 (4ft x 8ft x 1 in): This variant of FOAMULAR® 250 XPS insulation offers the same performance and durability in a 1-inch thickness.
Owens Corning FOAMULAR 150 XPS Insulation Board: With a lower compressive strength than the 250 series, this insulation board is suitable for less demanding applications.
Owens Corning FOAMULAR Insulpink-Z XPS Insulation Board: Designed for interior applications, this product offers enhanced moisture resistance and excellent insulating performance.
Customer Feedback
Owens Corning FOAMULAR 250 XPS Insulation Board has received positive feedback from customers who have used it in their construction projects. Many have noted that the product offers exceptional thermal performance, effectively insulating a variety of spaces while maintaining its moisture resistance.
Customers appreciate the fact that FOAMULAR 250 XPS Insulation Board is lightweight and easy to install, saving time on their projects. The versatility of the product has been praised by many, who have used it for a wide range of applications, including wall furring, perimeter/foundation, cavity wall, pre-cast concrete, and sheathing.
Overall, customers have found Owens Corning FOAMULAR 250 XPS Insulation Board to be a versatile, easy-to-install, and high-performing solution for their insulation needs. They would recommend it to others who are looking for a top-quality insulation product.
Technical Specifications
Brand | Owens Corning |
Compressive strength | 25psi (kPa) |
Edge profile | Scored Square Edge |
Fire rating | ASTM E84 |
Flame spread | 5 |
Material type | XPS (Extruded Polystyrene) |
Product length | 96" |
Product type | Rigid Board |
Product width | 48" |
Smoke developed | 45-175 |
Temperature range | 74°C |
Water absorption | 0.10% by volume |
Water vapor permeance | 1.5 perm |
Datasheets
Delivery Information
Est Delivery between 6th Feb and
12th Feb.
Delivery will always take place on a weekday (Mon - Fri excl. public holidays).
An exact shipping charge will be calculated at checkout based on your order and location.
For more information on shipping view our delivery info page.
Frequently asked questions
Can you help me pick the right insulation for my project?
Yes, of course!
Our team is ready to assist you with any questions and queries you may have.
Just reach out to us via any of the following methods:
Call us: 786-224-0029
Email us: sales@4us-group.com
or click the Livechat tab at the bottom of your screen.
How do I track my order?
As soon as your order is dispatched, you'll receive a dispatch email with delivery dates and details for your order.
If you require an update on your order, you can email deliveries@4us-group.com with your order number for assistance.
Can I order now and pay later?
Yes, we offer a variety of flexible payment options to all our customers.
When checking out online, you'll be able to avail of multiple buy now, pay later options with ShopPay, Klarna or PayPal.
The flexible payment options available to you at checkout will be based on the total value of your order.
For B2B customers, you can apply for a 30-day trade credit account, and you'll also unlock:
- Dedicated trade pricing
- Loyalty points and rewards
- A dedicated account manager
I have a large-scale project, can I get a quote?
Yes, if you are carrying out a construction project that requires a large quantity of materials, email sales@4us-group.com with the following information and we will get back to you with your very own bespoke price quote:
- Delivery postcode and address
- Mobile number
- Company name
- A list of required materials and their quantities
Can I open a pro contractor account?
Yes! Pro contractors can open a B2B account to unlock bespoke pricing, B2B discounts, trade credit, loyalty points, and a dedicated personal account manager.
You can learn more here: Open a pro contractor account
Can I cancel or amend my order after placing it?
Yes, if your order has not yet been processed for dispatch, cancellation/ amendments should be possible.
Our team works quickly to get your order delivered as soon as possible so it is likely that your order will be processed for dispatch within 2-3 hours of purchase.
Contact us immediately via sales@4us-group.com or call 786-224-0029 during opening hours.
If you wish to amend your order after it has been processed by our team, it will be treated as a return or a separate new order.
Read more: Returns