Raft Foundations

A rib raft concrete foundation offers a range of benefits over conventional concrete foundations and floors.

At Otago Foundations & Concrete we specialise in raft foundations as we recognise the need for houses and buildings in this area to be warmer, stronger and more economical.

Our professional team will ensure the right foundation is installed for you...

Our System

Our preferred solution is the Allied READY Super Slab raft foundation system, an above ground engineered flooring system designed to deliver significant benefits over conventional floors and foundations.

A grillage of beams within the concrete slab provides a stiffer and stronger final product than a conventional 100mm slab, and because of its inherent strength a deepened perimeter footing can usually be omitted.

READY Slab Benefits include:

  • Faster installation resulting in a more cost effective build
  • Minimal excavation requiring less soil removal
  • Low soil-bearing capabilities (perfect for soft ground)
  • Thermally insulated meaning a higher R value (and can be fully insulated)
  • Service installation is easy!

Where to use it?

READY Super Slab can be used on all ground conditions regardless of your land classification, including:

  • House slabs
  • Shed floors
  • Small commercial buildings
  • Warehouses

BRANZ & CodeMark Certified

READY Super Slab has a BRANZ appraisal and is now CodeMark Certified. Having a CodeMark Certification means building consent authorities will accept READY Super Slab as complying with the New Zealand Building Code (when used as specified in the CodeMark certificate). You will still need to apply for building consent, however the CodeMark means no delays at council.

Documents required as per CodeMark specification:

  • Allied READY Super Slab Technical Manual
  • CodeMark Certificate of Conformity
  • BRANZ Appraisal

Our Process

We can profile and set out your foundation position, arrange the scrape and preparation of the building site and organise for sub-trades to install drainage and other services.

From there we install the foundation boxing, raft components (polystyrene pods, steel reinforcing mesh and bars) as per plans, arrange concrete pour and placing and strip once cured. Once a site is ready for its foundation we can typically have a standard foundation boxed and poured within 5 days.

You will benefit from having one of the owners of the company dedicated to your project from end to end. Every project is important to us and our ability to handle projects sets apart from much of our competition.

Our Philosophy

Continuous improvement is at the heart of our business culture, we constantly challenge what we do and how we do it to ensure that we are leaders in our industry.

We use the latest in formwork and installation methodology to increase efficiency and ensure that we have a minimum of waste leaving site.

We make substantial investments in technology both on and off site to ensure our projects are delivered on time and our staff are maintaining health and safety standards to the highest level.

Get in touch today - call 0508 OFC LTD

Otago Foundations



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