Styrofoam™ Brand Perimate™

Commercial | Residential | Multifamily | Wall

Moisture-resistant protection for basement walls

Designed for exterior foundation walls, Perimate™ XPS Insulation provides a lightweight, durable system that protects the waterproofing membrane while it fends water drainage away from the foundation.


Styrofoam™ Brand Perimate™

Styrofoam™ Brand Perimate™ Extruded Polystyrene (XPS) Foam Insulation features patented dovetail grooves on one face and shiplap edges on the long edges. When installed on the exterior of basement walls, it provides insulation, protects the waterproofing membrane and assists water drainage away from the foundation.


Features & benefits

Grooves face the soil to channel water down to the footing drains or weeping tiles
  • Suitable for use in pervious, semi-pervious and practically impervious soils
  • Resists moisture
  • Used on exterior foundation walls to assist water drainage away from the foundation

    Physical Properties

      Method Unit Value
    Water Absorption, max.<sup></sup> ASTM C272 Vol % 0.3
    Thermal resistance (per inch)<sup></sup> ASTM C518 ft2•h•°F/Btu. R-value, min. 1.063” R-5-0; 2.125” R-10-0
    Compressive Strength<sup></sup> D1621 Psi, min (kPa) 30 (210)
    Drainage Capacity<sup></sup> D4716 Gal/min/ft (m3 /hr/m) 3.0 (>0.72)
    Water Vapor Permeance<sup></sup> E96 perm (ng/Pa•s•m2 ), max. 1.1 (60)
    Maximum Use Temperature<sup></sup> - °F (°C) 165 (74)
    Coefficient of Linear Thermal Expansion<sup></sup> D696 in/in•°F (mm/m•°C) 3.5 x 10-5 (6.3 x 10-2)
    Flexural Strength<sup></sup> C203 psi (kPa), min. 50 (350)

    Available Sizes

    Width Length
    24 96
    24 96