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Accuthermax™ XPS 400

Accumen Shapes

Accumen is the New Zealand manufacturer of Accuthermax™ XPS. We stock standard sheets and can also cut custom shapes to meet your project requirements. Accuthermax™ XPS is also used in the manufacture of our Slab Edge Insulation – Accumen SEI Boards.

Accuthermax™ XPS has become a material of choice for home builders, specifiers, architects and engineers thanks to its high compressive strength and superior thermal performance. It is produced with high levels of recycled expanded polystyrene diverted from landfill, making it a genuinely sustainable building product.

Accuthermax™ XPS delivers higher long-term R-values and consistent thermal performance. Resilient and robust, Accuthermax™ XPS is suitable for a wide range of residential and commercial applications.

Because insulation performance drops when it absorbs water, Accuthermax™ XPS is engineered with a high-density, closed-cell structure that makes it practically impervious to moisture. Even under extreme weather conditions it maintains its thermal and physical properties.

Details
General
  • Country of origin
    Australia
  • Type of use
    Commercial and Residential
  • Package type
    Special packaging required
  • Care and cleaning
    Easy maintenance
  • Installation
    Professional installation recommended
Scope of use

Dimensionally stable, organically inert and moisture resistant, Accuthermax™ XPS meets key requirements in structural and civil engineering. With superior compressive strength and long-term R-values, it is ideal for:

  • Floors subject to engineered loads and constant traffic
  • Inverted roofs and rooftop gardens
  • Parking decks
  • Slab edge insulation
  • Commercial purlin roof spacers

All Accuthermax™ XPS products are manufactured from a fire-retardant raw material and do not present a fire hazard when correctly installed. Like other organic materials, polystyrene will burn in direct contact with flame, but will self-extinguish once the fire source is removed.

Produced without refrigerants and free from HCFCs, Accuthermax™ XPS helps limit external temperature influences, reduce internal temperature swings and lower reliance on air-conditioning. That means less energy use and fewer greenhouse gas emissions over the life of the building.

Key benefits of Accuthermax™ XPS

  • Superior compressive strength
  • Extremely durable for long-lasting applications
  • Lightweight and easy to handle
  • Practically impervious to water
  • Delivers long-term retained R-values
  • Environmentally friendly – CFC & HCFC free
  • Complies with all relevant building codes
  • Tested for compliance with NZS 4859.1
Performance

When insulation comes into contact with water it can have an adverse effect on its ability to thermally insulate; but when faced with extreme weather conditions, Styroboard XPS still preserves its thermal and physical properties thanks to its high-density cell structure, making it practically impervious to water.

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About the
Seller

Accumen delivers excellence across two specialised sectors: premium lightweight architectural mouldings and high-performance insulation solutions.

In our Mouldings division, we create striking façades and design features with precision-crafted columns, cornices, parapets, chimney surrounds, and custom profiles — all manufactured using our signature DecraShape®, fourPLUS®, and ShapeCrete® systems for lasting beauty and strength.

In our Insulation division, we supply and support advanced systems designed for maximum energy efficiency and fire protection, with a focus on Phenolic Pipe Sections and Pre-Formed Fibreglass Pipe Insulation for industrial and commercial applications.

Our range also includes FOAMGLAS® Cellular Glass and Ravatherm XPS, delivering proven performance in the most demanding environments.

With decades of experience, innovative manufacturing, and a commitment to quality, Accumen is the trusted partner for projects that demand both aesthetic impact and technical performance — delivered on time, on budget, and to the highest standard.

Verified ArchiPro Member11 years · Since 2015