Owens Corning R-1 (25 PSI) FOAMULAR Extruded Polystyrene Foam Fanfold Underlayment Insulation

Product Overview The Owens Corning R-1 (25 PSI) FOAMULAR Extruded Polystyrene Foam Fanfold Underlayment Insulation is expertly engineered to improve your home’s energy efficiency while offering strong thermal resistance and durability. This 1/4″ x 48″ x 50′ square edge insulation is ideal for lowering heating and cooling costs. It provides a smooth, even surface for siding installation and is perforated to allow moisture to escape, ensuring long-lasting protection and performance against environmental factors.

Key Features

• High Thermal Resistance: Constructed from R-1 FOAMULAR extruded polystyrene foam, it provides effective thermal insulation.
• Moisture Management: The perforated design facilitates the escape of excess moisture, helping to prevent mold and mildew.
• Ease of Installation: The fanfold configuration with folded hinges at 24″ intervals simplifies the on-site application process.
• Strength and Reliability: Built to last with a minimum compressive strength of 25 PSI.
• Smooth Nailing Surface: Offers a flat surface for quick and efficient siding installation.
• Warranty: Backed by a limited lifetime warranty, ensuring long-term reliability.

Please check the Product Data Sheet Here

Specifications

Frequently Asked Questions (FAQ)

• What is the primary function of this underlayment insulation?

  • This product is designed to provide a smooth nailing surface for siding installation while delivering excellent thermal resistance and moisture management for exterior walls.

• How does the perforated design enhance the insulation?

  • The perforations allow excess moisture to escape, reducing the likelihood of mold and mildew, thus extending the insulation’s lifespan.

• Can this insulation be used for interior applications?

  • While primarily intended for exterior use, it can be employed in interior applications where additional thermal resistance is needed, as long as it complies with building code requirements.

• What does the R-1 value indicate?

  • The R-value measures the insulations resistance to heat flow. An R-1 value represents basic thermal resistance, suitable for situations where additional insulation layers are used or not necessary.

• Is this product environmentally friendly?

  • Yes, FOAMULAR XPS insulation contains a minimum of 20% recycled content and is GREENGUARD Gold certified, underscoring its commitment to sustainability while maintaining high performance.