Cladmate™ XPS Insulation

Commercial | Residential | Multifamily | Wall

The insulation advantage for walls and attics

Whether it’s new construction or a retrofit application, Styrofoam™ Brand Cladmate™ XPS Insulation is designed for easy installation in both residential and commercial buildings.


Cladmate™ XPS Insulation

Cladmate XPS Insulation is a Styrofoam™ Brand extruded polystyrene foam rigid board insulation with shiplap edges. It is designed for use in walls and attics of new and retrofit applications.


Features & benefit

Feature Benefit
Easy to handle, cut and install
  • Helps save time and money on site
  • Provides a continuous layer of insulation
  • Reduces thermal bridging
  • High moisture resistance
  • Reduced potential for condensation in wall cavities
  • Increased energy efficiency
  • Helps reduce heating and cooling costs
  • Helps keep indoor temperature consistent

    Physical properties

    Method Unit Value
    Thermal Resistance per in. (25 mm) @ 75°F (24°C) mean temp.1 ASTM C518 Btu•in/ft2•hr•°F, min. 5.0 (0.88)
    Compressive Strength2 ASTM D1621 psi (kPa) 20 psi (140 kPa)
    Water Absorption ASTM D2842 % by volume 0.7
    Water Vapor Permeance3 ASTM E96 perm (ng/Pa•s•m2) 1.5 (86)
    Maximum Use Temperature - °F (°C) 165 (74)
    Coefficient of Linear Thermal Expansion ASTM D696 in/in•°F (mm/m•°C) 3.5 x 10-5 (6.3 x 10-2)

    1 Values are consistent with criteria of CAN/ULC S 701-11

    2 Vertical compressive strength is measured at 10 percent deformation or yield, whichever occurs first.

    3 Based on 1” (25 mm) thickness.


    Available sizes


    Thickness1 (in.) R-Value2,3 Edge Treatment
    Cladmate™ XPS Insulation 2’x8’ 0.5 2.5 Buttedge
    0.75 3.75 Ship-Lap (4-sided)
    1.0 5 Buttedge, Ship-Lap (4-sided)
    1.5 7.5 Buttedge, Ship-Lap (4-sided)
    2.0 10 Buttedge, Ship-Lap (4-sided)
    2.4 12 Ship-Lap (4-sided)
    3.0 15 Buttedge, Ship-Lap (4-sided)
    4’x8’ 0.8 4 Ship-Lap (4-sided)
    1.0 5 Ship-Lap (4-sided)
    1.5 7.5 Ship-Lap (4-sided)
    2.0 10 Ship-Lap (4-sided)
    4’x9’ 0.8 4 Ship-Lap (4-sided)
    1.0 5 Ship-Lap (2-sided, 4-sided)
    1.5 7.5 Ship-Lap (4-sided)
    4’x10’ 1.0 5 Ship-Lap (2-sided, 4-sided)

    1 Not all products are available in all parts of the country. Contact your DuPont representative for more information. Not to be considered sales specifications.

    2 As per CAN/ULC S 701-11

    3 R-values expressed in ft2 •h•°F/Btu.