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Owens Corning FOAMULAR 250 XPS Insulation Board - All Sizes 1 in Owens Corning
Owens Corning FOAMULAR 250 XPS Insulation Board - All Sizes 2 in Owens Corning
Owens Corning FOAMULAR 250 XPS Insulation Board - All Sizes 3 in Owens Corning
Owens Corning FOAMULAR 250 XPS Insulation Board - All Sizes 1.5 in Owens Corning
Owens Corning FOAMULAR 250 XPS Insulation Board - All Sizes 2.5 in Owens Corning
Owens Corning FOAMULAR 250 XPS Insulation Board - All Sizes 3/4 in Owens Corning
Owens Corning FOAMULAR 250 XPS Insulation Board - All Sizes 4 in Owens Corning
Owens Corning FOAMULAR 250 XPS Insulation Board - All Sizes Owens Corning
Owens Corning FOAMULAR 250 XPS Insulation Board - All Sizes Owens Corning
Owens Corning FOAMULAR 250 XPS Insulation Board - All Sizes Owens Corning
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OWENS CORNING

Owens Corning FOAMULAR 250 XPS Insulation Board - All Sizes

SKU: OWCFOAM2503/4In

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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
3/4" 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

Product Data Table

Property Test Method2 Value
Thermal Resistance3, R-Value (180 days) minimum,
hr·ft2·°F/Btu (RSI, °C·m2/W)
@ 75°F (24°C) mean temperature
ASTM C518
¾" Thickness 4.0 (0.70)
1" Thickness 5.0 (0.88)
1½" Thickness 7.5 (1.32)
2" Thickness 10 (1.76)
2½" Thickness 12.5 (2.20)
3" Thickness 15 (2.64)
4" Thickness 20 (3.52)
@ 40°F (4.4°C) mean temperature
¾" Thickness 4.3 (0.76)
1" Thickness 5.4 (0.95)
1½" Thickness 8.1 (1.43)
2" Thickness 10.8 (1.90)
2½" Thickness 13.5 (2.38)
3" Thickness 16.2 (2.85)
4" Thickness 21.6 (3.80)
Long Term Thermal Resistance, LTTR-Value3, minimum
hr·ft2·°F/Btu (RSI, °C·2/W)
@ 75°F (24°C) mean temperature
CAN/ULC S770-03
¾" Thickness N/A
1" Thickness 5.0 (0.88)
1½" Thickness 7.8 (1.37)
2" Thickness 10.6 (1.87)
2½" Thickness 13.4 (2.36)
3" Thickness 16.2 (2.85)
4" Thickness 22.0 (3.87)
Compressive Strength, minimum psi (kPa) ASTM D1621 25 (172)
Flexural Strength, minimum psi (kPa) ASTM C203 75 (517)
Water Absorption, maximum % by volume ASTM C272 0.10
Water Vapor Permeance, maximum perm (ng/Pa·s·m2) ASTM E96 1.5 (86)
Dimensional Stability, maximum % linear change ASTM D2126 2.0
Flame Spread ASTM E84 5
Smoke Developed ASTM E84 45-175
Oxygen Index, minimum % by volume ASTM D2863 24
Service Temperature, maximum °F (°C) 165 (74)
Linear Coefficient of Thermal Expansion, in/in/°F (m/m°C) ASTM E228 3.5 x 10-5 (6.3 x 10-5)
Product Length 96"
Product Width 48"
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 Type Rigid Board
Smoke Developed 45-175
Temperature Range 74°C
Water Absorption 0.10% by volume
Water Vapor Permeance 1.5 perm

Est Delivery between and

Delivery will always take place on a weekday (Mon - Fri).
For information on delivery costs and more view our delivery info page.