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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.
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