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MAXRaft is the solution for an insulated slab being built on less stable ground, in particular the TC2 type ground encountered in Christchurch. MAXRaft is engineered to be seismically stronger in earthquake conditions compared to traditional concrete foundations. 

The perimeter footings and load bearing thickenings from the standard MAXRaft remain similar, ensuring that your perimeter and load bearing walls can be supported while maintaining the thermal envelope around the house.

With MAXRaft, the infill area of the slab is engineered to provide stiffened ribs throughout the floor with the additional advantage of maintaining a thermal break around the foundation rather than transferring heat directly to the ground between the ribs where it is lost, as is the case with traditional waffle floors.

Key Features
  • Suitable for TC2 ground
  • Increased thermal efficiency
  • Less time required on site
  • Site-specific engineering
  • Reliable, proven construction details
  • Achieves an R Value of R4.5 according to floor type
  • MAXRaft R-value Calculator — find the product to exceed the requirements of H1
Scope of Use
  • Suitable for TC2 ground
  • Site-specific engineering
  • Achieves an R Value of R4.5 according to floor type
  • Use the MAXRaft R-value Calculator to find the product from the MAXRaft range to meet & exceed the requirements of H1
MAXRaft R-value Calculator
Technical Resources
BRANZ Appraisal 1054

1054 [2019]

Product Guide


CAD/PDF Details
MAXRaft Products
MAXRaft 320
MAXRaft 340
MAXRaft 400
MAXRaft 400 (Steel fibre concrete)
MAXRaft 420

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

Product Enquiries

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