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MAX85 is designed to meet the minimum requirements of the new H1 building code. Unlike MAXRaft's other products MAX85 does not have insulation in the thickenings and ribs. The patented insulated edge provides a complete thermal break around the perimeter of the slab with waffle PODS throughout the rest of the floor. 

Like all other MAXRaft slabs the polystyrene materials in MAX85 are delivered to site pre-cut to ensure maximum efficiency when installing and maximum sustainability in the factory.

MAX85 R-value ranges from 1.5 to 2.48 depending on the internal A/P ratio of the building.

Key Features
  • Includes MAXRaft patent VH EPS Perimeter
  • Suitable for good ground/ soft ground / TC2/ expansive soils/ piles
  • Suitable with 90mm/140/SIPS
  • Panel plan and pre cut materials
  • Engineered design
  • 85mm concrete
  • Suitable for sloping sites
  • MAXRaft R-value Calculator — find the product to exceed the requirements of H1
Scope of Use
  • Suitable for good ground, soft ground, TC2, expansive soils, piles
  • Suitable for sloping sites
  • Suitable with 90mm/140/SIPS
  • Engineered design
  • Use The MAXRaft R-value Calculator to find the product from the MAXRaft range to meet & exceed the requirements of H1
Limitations on Use
  • MAX85 is not designed to work in conjunction with embedded Underfloor Heating — where UF Heating is specified see MAXSlab or MAXRaft Plus+
Statement of Building Code Compliance

The MAXRaft Concrete Slab Floor System (MaxSlab) can be used to construct steel reinforced, concrete slab-on-ground floors subject to specific engineering design for buildings within the following scope:

  • Ground floor slabs for timber-framed buildings, within the scope of NZS 3604, or other similar lightweight constructions where they are subject to specific engineering design; and
  • Built on 'good ground' as defined by Acceptable Solutions and Verification Methods for NZBC Clause B1 Structure; or,
  • Built on 'TC2' type ground within the 'Canterbury earthquake region' or moderately to highly expansive soils, subject to verification and assessment by a Chartered Professional Engineer

See BRANZ Appraisal 1054 for full information.

MAXRaft R-value Calculator
Technical Resources
BRANZ Appraisal 1054

1054 [2019]

Product Guide


CAD/PDF Details
MAXRaft Products

Build a healthy and more cost effective home from the foundation up with MAXRaft, New Zealand's premier fully insulated concrete slabs.

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