Worker installing a standard 1200 Interbloc concrete block on top of the already-built 2 rows underneath.
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Interbloc - Concrete Blocks Build Faster, Stronger, Safer

Interbloc is a large modular precast concrete construction system, designed to create a mass concrete block with a unique interlocking design. Although primarily a gravity system, this design incorporates a number of features that allow structures to be reinforced vertically or with geogrid. The design allows Interbloc to self-align during the install process, delivering an incredibly fast build time. Over the past 16 years, we’ve built 4200 structures across New Zealand and Australia using Interbloc.

Interbloc is perfect for both temporary and permanent solutions. Applicable across a range of sectors, it is commonly used for bulk material storage, separation walls, feed and fertilizer storage hoardings, and to build retaining walls in Auckland, the South Island, and beyond.

How We Started & Our Values

Interbloc is a sub-brand of Envircon and was launched in 2004. With our goal of reducing waste, we developed a product that upcycles this leftover concrete. This product is Interbloc; one of the best modular systems in New Zealand. Through excellent engineering and high sustainability goals, we believe Interbloc offers you unique benefits not offered elsewhere. Because we are confident you’ll love Interbloc, we also offer a BuyBack Guarantee!

Interested? Request More Info

Why Choose Interbloc?

Precast blocks stack together with easer; two people can build up to 160m² of wall per day.

600mm thick solid concrete blocks and a unique interlocking shear key delivers unparalleled strength in even the harshest environments.

Use our generic engineering solutions or request specific engineering designs from our competent team. Walls can be engineered to PS1 standard.

Blocks can be unstacked with ease and moved for reuse, or on-sold when no longer required.

All our premium blocks come with comprehensive warranties; we even offer a unique BuyBack Guarantee. Minimum MPa can be supplied on request.

From design through to commissioning, Interbloc provides unbeatable support throughout the whole process

Annotated diagram of an Interbloc block showing its benefits. (1) Our comprehensive quality control system delivers true to size blocks, consistent in colour and texture (2) Certified central lifting anchor allows ease of movement and efficiency in (3) Central holes provide for reinforcing using threaded bar (4) Each standard 600 series block is 1000kg, equivalent to 14.7kN/m2 (5) Sheer Strength is inherent in the block' unique cruciform tongue and groove, registered design. This increased the overall stability of the wall and ensures the integrity of each joint. The design also allows the blocks to positively locate ensuring accuracy and ease of installation.

Our Concrete Block Range

Browse the full range of our concrete blocks, usable in a variety of applications as a cost-effective building solution.

Interbloc Solutions and Applications

Commercial Solutions

A wide view of aggregate storage being constructued using concrete blocks.
A quarry built with Interbloc

Civil Solutions

A wide view of a retaining wall made with concrete blocks

What Our Clients Say About Interbloc

Great product, Great people and great service on what was a very last minute order. Thanks Heaps.
Cathy Kenna
Quick and easy to install, ultra fast delivery and great service for a good price. Whats not to like?
Dave Millar
Fairly small order but Joanne and Dion were extremely helpful and the items were delivered where and when required. 5 Stars.
David Jenkinson

Overall, my experience was amazing ! Klaudia is a Superstar ! We had multiply changes and she dealt with it so positively ! love the attitude !

Avikesh Kumar
easy, hassle free process
It’s efficient, reliable, and flexible – that is why we choose Interbloc. And the service is excellent.
The Interbloc approach doubled the factor of safety at the stores. That was important to Viterra; it’s a large company and needs surety in its health and safety systems
Rohan Pollard
Interbloc is a company with a proven record of doing things correctly, they have formed many significant partnerships in the construction industry and we are happy to be included in that group.
Alwyn van der Linde
Great product & great service - highly recommend Interbloc
Rubbish Direct
We recently purchased Interbloc Blocks and the whole process from initial contact to delivery and installation was a breeze. The team at Interbloc were helpful, prompt and even when I increased our order after half the blocks had been delivered it wasn't a problem. The Interbloc locking system makes it easy to construct and an end product that looks great. Thanks to Dion & the team a pleasure doing business.
Darren Harris
We had a small crisis at work, our loading bank for chip and residues was falling. The would stop our operation. The team at Interbloc gave us a solution that we could dismantle and rebuild our wall in 1½ days. The advice was good, the service prompt and the result was great. I would recommend Interbloc when you need a fast, stable wall for a competitive price.
Conrad Whittle

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Case Studies

Southbase Concrete Weights
Fulton Hogan has a long history of operations as one of the founding contracting businesses in New Zealand. More recently, Fulton Hogan has extended its operations into Australia and is rapidly growing a presence and reputation as a major contractor who delivers what they promise.
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Fulton Hogan
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Well Connected
Well Connected Alliance has been tasked with constructing an infrastructure development that ranks as the largest roading project ever seen in the country.
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Viterra has operations in North America, Australia, New Zealand and China. The Regina, Saskatchewan-based company is organised as three business units including an agri-products business that, among other things, makes and sells fertilizer.
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