Rigid Insulation

Rigid insulation, also known as rigid foam board, is a high-performance insulation material designed to improve a building's thermal efficiency. Installed in walls, roofs, foundations, and other building assemblies, rigid insulation helps slow heat transfer, keeping interiors warmer in the winter and cooler in the summer.

Benefits of Rigid Insulation

  • High R-value for efficient thermal performance
  • Helps reduce energy costs
  • Available for a wide range of residential and commercial applications
  • Select products offer added moisture resistance

Learn more about the brands we carry: 

DuPont

DuPont has been a trusted name in building materials for decades, offering rigid insulation products that help improve energy efficiency and long-term building performance. No matter the project, DuPont's foam board insulation delivers reliable, durable products designed for straightforward installation.

Thermax™ Sheathing

DuPont™ Thermax™ Sheathing combines dependable insulation and moisture management into a single rigid wall sheathing solution. Its glass-fiber-infused foam core provides thermal performance, fire resistance, and dimensional stability, while reflective aluminum facers help keep water and water vapor out of the wall assembly.

Key Features

  • High, long-term thermal resistance
  • Helps reduce moisture condensation within and behind the insulation
  • Lightweight and easy to cut, handle, and install
  • Can eliminate the need for a separate membrane or building wrap in some applications
  • UV-stable technology allows the product to remain uncovered for up to six months
  • Available in R-values from approximately R-3.3 to R-24 depending on thickness
  • Available in 4' × 8' and 4' × 12' boards

Styrofoam™ Brand Scoreboard™ XPS Foam Insulation

DuPont™ Styrofoam™ Brand Scoreboard™ XPS Foam Insulation is an extruded polystyrene (XPS) foam board designed for exterior cavity wall and foundation applications. Its scored surface makes it easy to cut to common jobsite sizes, while its resistance to water and water vapor helps maintain consistent thermal performance over time.

Key Features

  • Excellent insulating characteristics with an R-value of 5.0 per inch
  • High resistance to water and water vapor
  • Exceptional compressive strength and long-term durability
  • Scored at 16" and 24" centers for easy sizing and installation
  • Available in thicknesses from ¾" to 3"
  • Available in 4' × 8' boards
  • Meets ASTM C578, Type IV requirements for rigid cellular polystyrene thermal insulation