Plazamate™ XPS Insulation

Commercial | Residential | Multifamily | Wall

Defend commercial decks against the weather

Reduce the risk that weather holds for commercial plaza roof decks. Installing Styrofoam­™ Brand Plazamate™ XPS Insulation above waterproofing membranes in plaza deck applications helps membrane resist the freeze-thaw cycles that can inflict damage during and after construction. 


Plazamate™ XPS Insulation

Plazamate™ extruded polystyrene (XPS) foam insulation is a Styrofoam™ Brand Insulation designed for installation above waterproofing membranes in plaza deck applications. Plazamate™ Insulation helps the roof membrane maintain a steady temperature, minimizing the harmful effects of freeze-thaw cycles weathering and physical damage during and after construction.


Features & benefits

Feature Benefit
Designed for installation above waterproofing membrane
  • Protects roof membrane from weathering
  • Customizable to size and shape
  • Easy to use
  • Cost effective

    Physical properties

    Method Unit Value
    Thermal Resistance ASTM C518 ft2 •h•°F/Btu 5.0
    Compressive Strength1 ASTM D1621 psi, min. 60
    Water Absorption ASTM C272 % by volume, max. 0.3
    Water Vapor Permeance2 - °F 165
    Coefficient of Linear Thermal Expansion ASTM D696 in/in•°F 3.5 x 10-5
    Flexural Strength ASTM C203 psi, min. 75
    Dimensional Stability ASTM D2126 % linear change, max. 2.0
    Surface Burning Characteristics ASTM E84 - -
    Flame Spread Index3 - 15
    Smoke - 165

    1 Vertical compressive strength is measured at 10 percent deformation or at yield, whichever occurs first. Since Styrofoam™ Extruded Polystyrene Foam Insulations are visco-elastic materials, adequate design safety factors should be used to prevent long-term creep and fatigue deformation.

    2 Based on 1” thickness.

    3 This numerical flame spread rating is not intended to reflect hazards presented by this or any other material under actual fire conditions


    Available sizes


    Thickness1 (in.) R-Value Board Size (in.) Edge Treatment

    1 Not all product sizes are available in all regions.