Platinum Board

    Platinum Board is a high-performance Graphite EPS Insulation Board for Premium Builds

    Download Datasheet

    Graphite Infused – Premium Expanded Polystyrene Sheet

    Building Product Information Sheet

    Platinum Board is Expol's premium rigid insulation solution — a graphite-infused Expanded Polystyrene (EPS) board engineered to provide superior thermal insulation, enhanced R-values and long-lasting performance across a wide range of building applications. Its advanced insulation properties deliver excellent thermal resistance even at reduced board thickness, enabling smarter, space-efficient construction without sacrificing comfort or energy efficiency.

    Ideal for residential, commercial, and industrial projects, Platinum Board offers a balance of high thermal performance, structural reliability and design flexibility. Whether used in wall cavities, roof assemblies or specialty building zones, it supports energy efficiency, improved indoor comfort, and long-term durability in New Zealand's varied climate.

    +20%
    Higher R-Value compared to standard grade EPS
    Various sizes
    EXPOL Platinum Board Product Sheet

    Key Features & Benefits

    20% Higher R-Value
    Superior thermal performance (R-Value) that doesn't degrade over time
    Exceptional rigidity and strength
    High water resistance
    Lightweight and easy to cut, handle and install
    Excess product easily recycled in other EXPOL products
    Fire-retardant material
    100% Recyclable

    Why Choose Platinum Board?

    Enhanced Performance

    Graphite particles reflect radiant heat, providing up to 20% better thermal performance than standard EPS.

    Premium Quality

    Manufactured to the highest standards with consistent quality and performance you can rely on.

    Versatile Applications

    Suitable for walls, roofs, floors, and specialty applications where premium performance is required.

    Technical Support & Specification Tools

    Platinum Board is supported by full technical data sheets, specification guidelines and thermal performance charts — enabling architects, builders and specifiers to confidently design for compliance and performance.

    Learn more about specific applications

    Click a solution below to view installation guides and full system details

    CladdingCladding
    Masonry WallsMasonry Walls
    Concrete FloorsConcrete Floors
    Wall InsulationWall Insulation
    Skillion RoofSkillion Roof

    Technical Data

    PropertiesTest Results
    MaterialExpanded Polystyrene with Graphite
    Density18 kg / m³
    Sheet Size2400 mm x 1200 mm | 2700 mm x 1200 mm | 3600 mm x 1200 mm | 4800 mm x 1200 mm | 1200 mm x 355 mm | 1200 mm x 555 mm | 2450 mm x 1200 mm
    Thickness / R Value
    10mm-
    20mmR 0.63
    25mmR 0.78
    30mmR 0.94
    35mmR 1.09
    40mmR 1.25
    45mmR 1.41
    50mmR 1.56
    55mmR 1.72
    60mmR 1.88
    65mmR 2.03
    70mmR 2.19
    75mmR 2.34
    80mmR 2.50
    85mmR 2.66
    90mmR 2.81
    95mmR 2.97
    100mmR 3.13
    110mmR 3.44
    120mmR 3.75
    Thermal Conductivity (ATSM 168)K – Value 0.032
    Rate of water vapour transmission (max) measured parallel to rise at 23°C (AS 2498.5)- mg/m²s
    Permeability- m/s
    Compressive Resistance KPA at 1% (AS 2498.3)- KPA
    Compressive Resistance KPA at 2% (AS 2498.3)- KPA
    Compressive Resistance KPA at 5% (AS 2498.3)- KPA
    Compressive Resistance KPA at 10% (AS 2498.3)105 KPA
    Young's Modulus- MPA
    Cross breaking strength KPA (AS 2498.4)200 KPA
    Dimensional stability of length, width & thickness (max) at 70°C for 7 days (AS2498.6)1%
    Long term water absorption by immersion (ASTM C72)- %v / v
    Determination of flame propagation surface ignition (AS2122.1-1993)Medium flame duration (max): 2 sec
    Eighth vale: 3 sec
    Fire behavior (AS/NZS 1530.3:1999)Spread of flame index (0 – 10): 0
    Smoke developed index (0 – 10): 5
    Recycled Content0%
    RecyclabilityEPS is 100% recyclable
    Environmental StatementEPS is inert and non-toxic. There are no chemicals or gases harmful to the environment emitted from EPS either during manufacture or within use.
    Ozone Depleting PotentialEPS does not contain ozone-depleting CFC or HCFC gases, nor use them in its manufacture. As a result, EPS has zero ozone depletion potential.
    Vermin ResistanceEPS does not offer any nutritive value.

    Warranty & Compliance

    Warranty and New Zealand Building Code information as published in the Platinum Board technical data sheet.

    EXPOL Platinum Board warranty and compliance
    SpecificationDetail
    Warranty20-year warranty on EXPOL EPS foam insulation products
    Building Act 2004Platinum Board (EPS) is not subject to a warning or ban under the Building Act 2004
    Place of manufactureManufactured in New Zealand by EXPOL

    For full warranty details see the Warranty page, or download the technical data sheet above.