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Sustainability is increasingly shaping up to be a significant driver of change in how we build and operate in New Zealand. Over the past five years a raft of new statutory and regulatory requirements have been passed or come into force.

Legislation such as the Zero Carbon Act, Waste Minimisation Act, Resource Management Act (RMA), and Environmental Reporting Act, have been passed to push a more sustainable approach to managing resources.

We profile some of these in this article, and this blog will guide you through key dates in 2023 and beyond.

Zero Carbon Act

The Zero Carbon Act (also known as the Climate Change Response Act) is one of the most prominent New Zealand Government Acts relating to sustainability. It aims to help limit the global average temperature to 1.5 degrees celsius under the Paris Climate Agreement. This requirement that forms the Act spans decades, so vigilance in knowing what’s coming up is needed.

Zero Carbon Act NZ

The largest target for this act is known as “Target for 2050”. This Act requires:

BY THE BEGINNING OF 1ST OF JANUARY 2030:

BY THE BEGINNING OF 1ST OF JANUARY 2050:

POTENTIAL RECOMMENDATIONS TO AMEND 2050 TARGET

With the 2050 target being over two decades away, the Commission may recommend some changes. Keeping this in mind is a good idea to know as it has the potential to impact individuals & businesses.

In order for the Commission to recommend these changes a significant change has to occur. This includes the scientific understanding of climate change, New Zealand’s economy, New Zealand’s obligations under international agreements (like the Paris Climate Agreement), and technological developments.

Waste Minimisation Act

The Waste Minimisation Act aims to push New Zealand towards a circular economy. It encourages a reduction in the amount of waste by putting a cost on waste and encouraging product stewardship.

The circular economy

One of the largest components of the Waste Minimisation Act is the Waste Levy. From the 1st of July 2023, this is set to increase. Presently, the increase in levies is set to stop on the 1st of July 2024.

CURRENT, AS OF APRIL 2023

1 JULY 2023

1 JULY 2024

To help support the growth of a circular economy, mandatory product stewardships schemes are being implemented. Product stewardship asks manufacturers to take responsibility for the product at the end of their useful life. By doing this, it’s hoped that manufacturers will design products that maximise resource efficiency and reduce long-term waste.

With product stewardships, there are voluntary and regulated options. Regulated product stewardships are used for the 6 priority products that the Government has deemed a priority. These products are:

The upcoming regulated product stewardships are tyres and large batteries. Accreditation for tyres has been completed and is expected to launch in late 2023. For batteries, the accreditation is expected to be finalized in late 2023, with the scheme launching in 2024.

The Agrecoverey Foundation will be consulted on regulations to support farm waste (plastics, Agrichemicals, and their containers) in late 2023.

Resource Management Amended Act 2020

The purpose of the existing RMA is to balance the economic and environmental trade offs in resource use.. Not only does the RMA manage air, soil, fresh water and coastal marine areas, it also regulates land use and the provision of infrastructure that are integral to the country’s planning system (Ministry for the Environment)

Over the coming years, the RMA is getting a major overhaul. Three pieces of legislation are planned to replace the current RMA (Resource Management Act 1991). They are:

Confirmation of these changes is expected mid-2023. Soon after the new legislation comes into force the Government will release the National Planning Framework (NPF) which will provide more detailed national direction on how decision-makers in the new resource management system will give effect to the new legislation. The intention is that this comes into effect in early 2025.

Resource management reforms will play an instrumental role in planning for natural hazards. The NPF will provide national direction on risk reduction and resilience to natural hazards and the effects of climate change. The NPF will guide regions on how to undertake risk assessments, respond to, and prepare for future hazard and climate events, supporting consistency across New Zealand.

How Envirocon Is Helping Build a Greener Future

Since we were established in 2004, we’ve always been working towards building a greener future. With all of the changes coming to sustainability Acts and agreements, here is we make following the changes easy.

Our Interbloc concrete blocks are low carbon, zero waste (They’re CarbonSmar®t). At the tail end of 2022 we were independently verified with an EPD demonstrating we’re New Zealand’s only precast construction system that has a low carbon profile. This is made possible with a voluntary product stewardship that we have with leading concrete suppliers - we take high-quality, wet excess concrete that would’ve otherwise ended up in landfill and pour it into our Interbloc moulds. Using this concrete means fewer emissions are created, helping support New Zealand's construction industry to achieve the 2050 Zero Caron Act targets.

Allied Concrete truck leaving Envirocon Penrose Yard, Stonebloc in the foreground of photo

By using high-quality, wet excess concrete, we’re avoiding another waste stream being created. With the help of product stewardship, Interbloc works towards accomplishing the desired outcome of the Waste Minimisation Act - to reduce waste. Both of Envirocon’s ranges - Interbloc and Stonebloc - are modular concrete block systems meaning structures can be deconstructed when they’re no longer needed. Having solutions that are modular reduces the need for more materials/products being created, further supporting the Waste Minimisation Act.

Interbloc non-destructive dismantling for deconstruction

For a solution that works with New Zealand’s sustainability acts & agreements, ask about Interbloc or Stonebloc.

Having proper fertilizer storage is important

To maintain the quality and integrity of fertiliser, good storage is a must (CSBP).Fertiliser is used as a food source for plants, designed to break down in moist conditions so it’s easy to absorb. In order to keep the fertiliser high quality until it’s time to seed, it’s vital that it’s kept dry and safe from harsh weather (Yara).

The requirements for fertiliser storage vary on many factors, including whether the product is placed in indoor or outdoor storage.

Indoor Fertiliser Storage   Outdoor Fertiliser Storage 
Best storage practice involves placing the fertiliser in an enclosed building Store on a raised level, well-drained, dry and smooth surface
Needs to be made of a non-combustible material (e.g concrete, brick, or steel) and be well ventilated All fertilisers that’s stored outside should be protected from the elements by covering. This could be a roof on a bunker, tarpaulin, etc.
The floor needs to have a level, dry, and even surface, free from potholes
Typically need more ventilation, which comes with additional cost and maintenance

 

Challenges with storing fertilizer

WEATHER PROTECTION

Fertiliser is highly susceptible to moisture, as a result weatherproof storage is a must. Two common approaches to this is the use of an industrial shed or building, lined with concrete to provide a durable corrosion resistant storage solution. For smaller storage requirements, a concrete bunker with a roof is a common solution.

Common Example of Fert Bin

VENTILATION

Getting ventilation right for fertiliser storage is vital - it prevents the buildup of toxic gasses and maintains the product’s quality. In most cases, ventilation is more of a challenge for indoor fertiliser storage.

Largely, ventilation is a more pressing concern for long-term storage. In many cases, sturdy structures made of plastic, metal, or concrete are important. The downside of this, though, is that these structures can be inappropriate for storing organic fertilisers that are still producing methane and other gasses. To combat this, venting or flexible covers are required.

LIGHT EXPOSURE

When light hits most chemical fertilisers, it can break down into a product less valuable. This can even occur after a few hours of exposure. Providing an opaque solution to storage fertiliser is essential in order to maintain a high-quality fertiliser that might react to UV exposure. For outdoor storage, opaque solutions could come with the main structure themselves - made with concrete or timber, for example - and with the roofing. If fertiliser is granular in texture, exposure to UV rays can result in combustion. Keeping fertiliser away from light/UV rays is vital to ensure high quality product (Van Iperen)

HEAT CONTROL

The ideal temperature to store fertilizer in is between 5 and 27℃ (Van Iperen) Compared to light exposure, many fertilizers are far more sensitive to high temperatures. With some fertilizers, they can shift forms or lose the desired quality when exposed to temperatures above 27°C for more than a few hours at a time. At extreme temperatures of 38℃F and above, combustion risks arise from many urea and ammonia-based, nitrogen fertilizers. There’s no need for air conditioning in most fertilizer storage areas, but ventilation can help control both heat and moisture that leads to fertilizer degradation and loss.

MAINTAINING GRANULE SIZE

Fertiliser granules are designed to protect the nutrients contained within, often with a coating that stops air and moisture from reaching the active materials. When granules break down, they lower the fertiliser’s quality. Other compounds may form when this happens, causing too much sodium or heavy metals into the soil. Granules can break down because of vibration/movement from as soon as when the fertiliser is stored.

The benefits of using Interbloc for Fertiliser storage

Interbloc Mass Concrete Block Dimensions and Weight

Interbloc is designed to adapt to your needs and different environments. At the heart of the Interbloc system is an interlocking, precast concrete block. These blocks stack together easily - much like LEGO - to create durable, flexible structures. One common example of these structures are fertiliser bins, but other examples also include PKE/Feed Bins, Silage Bunkers, Retaining Walls etc.

Interbloc retaining wall, pke bin, fertsilier bin, silage bunker

Interbloc fertiliser bins have been designed to provide fast, effective storage with a unique flexibility to accommodate changes in the storage requirements. With over 10 years of experience and hundreds of fertiliser bins around the country, Interbloc is a proven fertiliser storage solution

By choosing Interbloc for your fertiliser storage, you also gain more benefits including:

Interbloc installation GIF

Interbloc Fertilizer Bin Success Stories

Lex Norton Small Fertiliser Bin

Small, Outdoor Fertilizer Bin - Lex Norton

Lex Norton owns and operates the lime prill storage facility for the far north located in Kaikohe. The bin has a capacity of 500 tonnes and was constructed in February 2008 using Interbloc with a simple externally supplied shelter roof.

Interbloc was chosen because:

“I was very happy with the Interbloc fertiliser bin and would recommend Interbloc structures for smaller farm storage requirements”. - Lex Norton

Read more

Large, Indoor Bulk Fertiliser Bin - Viterra

Interbloc Viterra Bin

Viterra needed to replace their existing retaining walls in their Geelong and Adelaide fertiliser stores, but ran into problems with traditional building techniques. Adding to that was the additional complication of the landlord wanting the 150 x 70 m retaining wall to be removed at Geelong.

Interbloc was chosen because:

"Viterra was considering a number of solutions. They needed an engineer-designed system and the walls had to be removable. Interbloc provided them with what they needed at a price they were comfortable with. The solution exceeded Viterra’s requirements in every way.” (Blueprint Consulting Engineers)

Read more

Interbloc fertiliser bins offer a practical solution to the challenges of fertiliser storage. Their unique design allows for secure and organized storage, while also minimizing the risk of environmental contamination. If you are looking for an efficient and sustainable way to store your fertiliser, consider Interbloc.

Contact us for a quote and take the first step towards hassle-free fertiliser storage

https://www.envirocon.co.nz/pages/contact-us

Stonebloc retaining walls combine strength and timeless design. To ensure that your wall is looking its best throughout its life, make sure you’re maintaining it. Stonebloc is made to be low maintenance, so it won’t take you much time.

What happens when you don’t keep up with maintenance

If you don’t complete regular maintenance, there could be a number of things that could occur. These are all avoidable if Stonebloc is designed as it should be and regular maintenance is conducted.

  1. Moss and other buildups on the facia of the wall
  2. Water leakage
  3. Graffiti

Here are some examples:

What happens when you don't maintain your retaining wall

For the easiest maintenance, it starts with the design & installation

Design

Stonebloc is made to be a low-maintenance retaining wall, but there are ways to reduce the time and effort you need to put in. Often, this comes at the design stage of your project - before a single block has been placed.

A waterproof barrier (like a mudguard) can be engineered into the design. Adding this will ensure that unsightly leakage between the blocks is prevented. If you’re considering this for your Stonebloc retaining wall, make sure to take a thicker wall design into consideration at the calculation stage.

Along with a waterproof barrier, it is vital to have good draining with your retaining wall. For Stonebloc designs, we’d recommend a drainage system that allows for a high crush resistance that can be used vertically or horizontally.

Here’s what to consider for retaining wall drainage:

On its own, Stonebloc is strong with a minimum 20MPa. If you’re needing something stronger, however, you can custom order Stonebloc with a range of specialist blends. This strengthening is done at the production stage when the wet concrete is poured into the Stonebloc mould. The agents that we add to these specialist blocks will help with added durability.

Installation

When installing, use this time to ensure all blocks are aligned correctly. Getting this correct the first time around, means future maintenance is easier.

To get your Stonebloc installation right, watch this video with James:

With installation, you need to ensure you’ve brushed all the blocks of debris. By not brushing away debris, stacked blocks will not sit flush on top of each other. Not only does this cause issues in installation, it also will cause maintenance issues to arise. Chipping of the blocks can occur if installation is not correctly done, and water/moisture drainage can be affected.

One thing you may encounter during installation is block gaps on alternative layers. Stonebloc is not made to be mm precise so they’re quite forgiving during installation. This can be remedied quickly at installation with shims, however, in most cases, these gaps will level out over time. This can still be corrected once the wall is installed, but it can take longer, costing you more money and time as you need to deconstruct the wall.

To help create accurate retaining walls fast, you can use one of our Stonebloc Installation Templates. Getting the base layer of a Stonebloc retaining wall correctly aligned is vital; getting it misaligned will not only make the remaining layers’ installation difficult, it will also lead to inaccuracy. This inaccuracy leads to retaining walls that are harder to maintain over the walls lifetime.

Stonebloc single template installation

The templates are available in two size

Tips for keeping your Stonebloc retaining wall in good condition

ADD GRAFFITI PROTECTION

For walls that are facing the public, it may be worthwhile to consider an anti-graffiti coating. Without adding a coating, graffiti removal from an unprotecting retaining wall can be costly and cause damage to Stonebloc’s facia. This needs to be applied annually

Some of the benefits of using protective coating include:

ADD A MOSS GROWTH PREVENTION COATING

If moss occurs, growths can be controlled with a 1: dilution of bleach/water. Just apply over the affected area using a watering can and leave for 2-3 minutes then wash off with a hose and brush. Make sure you use a lot of water to dilute the residue as the bleach will not only kill the moss & algae but other plants as well. It may also change the colour of the block walls. To fully control the spread, you may need to add 2 or 3 applications.

If weeds do appear between the joints of blocks in your Stonebloc wall, they can typically be removed by hand, hot water, steam water blaster, or controlled with weed killer. When using weed killer, make sure it's suitable for retaining walls specifically as it’ll be less likely to stain or discolour the blocks. Always follow the manufacturer’s directions on use and application.

WATER BLAST REGULARLY

Waterblasting is the most effective way to keep Stonebloc clean.

We do not recommend high pressure water blasters as this can damage Stonebloc’s facia, causing an unsightly finish of the wall.

HIDING THE LIFTING PINS

Over time, you may want to hide the lifting pins that sit on top of Stonebloc. This will give you a smooth, polished look. Depending on your project, you could use a cementitious leveling mortar to create an even finish.

Here are the features of a mortar that we’d recommend:

Stonebloc top

For any questions about maintaining your Stonebloc wall, reach out to us.

Interbloc and timber are materials commonly used for retaining walls across various industries like civil and construction. Both solutions come with their advantages and disadvantages depending on the project. This blog will help you determine which material is best for your current or upcoming project.

Interbloc Precast Concrete Block Walls

Made of wet excess concrete, Interbloc is a low carbon, zero waste precast concrete construction system - it’s CarbonSmart®. Central to the system is an interlocking, modular concrete block. Being modular, Interbloc can work across many applications (including retaining walls).

The features of the Interbloc concrete block system are:

Interbloc mass concrete block

Timber Walls

In New Zealand, cantilevered timber walls are often viewed as the go-to for retaining walls. Not only are they used for residential retaining walls, they are also used for commercial and industrial settings, even as retention walls.

Common features of a timber wall are:

Timber walls posts and rails

Interbloc vs Timer: Pros and Cons

Across the board, Interbloc offers you the most advantages and least disadvantages compared to timber walls.

The areas that Interbloc wins out are

The Pros of Interbloc and Timber

INTERBLOC

Interbloc precast concrete blocks form a modular system full of benefits. One of the noticeable advantages of using Interbloc is the productivity gains. 2 laborers can install up to 160m2 of wall per day. And thanks to the interlocking shear key on every block, you can rearrange as you build. The shear key is what turns Interbloc into a modular system and allows for the speed of construction with the strength of concrete.

Interbloc installation

Interbloc is unique in that is holds New Zealand’s only registered Environmental Product Declaration for a precast concrete product. This EPD demonstrates that blocks have an ultra low embodied carbon footprint. The result is that Interbloc offers a sustainable alternative to timber. Combining the origin of Interbloc’s concrete with the modularity of the system makes it a perfect system to support a circular economy. If an Interbloc structure is no longer needed, you can deconstruct and sell the blocks back to us via the buyback guarantee.

Interbloc's interlocking blocks are designed for reuse; they’re very durable. Every block in the range is 600mm wide giving you a long-lasting solution. In many instances, concrete is one of the strongest building materials used in construction so be rest-assured your walls will be up for years to come. Durability can also be found with Interbloc’s code-compliant engineering and vertical reinforcement options.

When choosing Interbloc over timber, there are 2 actions you don’t need to consider. The first one being a pre-build inspection. As there are no timber poles being concrete into the ground, council consent is not required in this instance. Compared to timber, there are minimal foundations required. Interbloc structures can be built straight on a concrete foundation, or have vertical reinforcing added to create a well-engineered, strong retaining wall.

TIMBER

Timber Wall

Timber is an acceptable solution under the NZ building code, and as such tends to be the go to for retaining in NZ. In most cases, walls under 1.5m do not need to be engineered. Over 1.5m, they need to be engineered in order to be consented by your local council.

In the general sense, adjustments are easy to be made during installation due to the ability to saw down materials as you need. Combined with the relatively light weight of the materials, construction can be completed fast (excluding concreting posts into the ground, which needs to be consented by the council).

The Cons of Interbloc & Timber

The upfront cost of installing an Interbloc wall can be greater than a timber wall. However, there is less maintenance and material replacement required compared to timber walls, so over time Interbloc will be much more cost-effective.

There are 2 main areas where Interbloc outperforms timber: longevity and installation. Even with treatment, timber walls can be suspect to rotting, warping, splitting, or termites. This leads to a building life of between 20 to 25 years (Green Future Construction). Compared to Interbloc, which will last for a minimum of 60 years, timber walls fail in comparison. Short-term maintenance for timber walls is relatively strategy forward - it’s the long-term maintenance that can be difficult.

However, timber lacks the long term durability of concrete. Even with the use of H5 treated timber, as required by the building code, the timber wall will degrade over time. We’ve all walked past a 20-year-old timber wall that is starting to sag forward with rotted rails. The solution in this instance is to replace the affected area or the entire retaining wall, costing you time and money. In contrast to this, Interbloc won’t deteriorate as it’s made from concrete - a generally stronger material than timber.

Failed timber retaining wall

Which is more sustainable: Interbloc or Timber

INTERBLOC

Interbloc is a low carbon, zero waste construction system. Using a product stewardship, wet certified excess concrete that would’ve ended up in landfill is added to Interbloc molds. As the carbon is already allocated to the project it came from, Interbloc is low carbon. It’s New Zealand’s only precast solution that demonstrates a low carbon profile.

Low embodied carbon is not the only sustainable element of Interbloc. You also get these benefits:

TIMBER

Like concrete, timber can be unsustainable or sustainable. In this instance, we’re talking about sustainable options with timber.

One of the main ways you’ll be able to tell if timber is sustainable is via a timber certification. In the case of New Zealand, this is the Forest Stewardship Council (FSC). This certification looks at how the use of timber and plantations affects the land, and the environment communicates and ensures forest management for future generations. When a forest is properly managed, timber can be one of the most effective carbon-storing materials (ArchiPro). By choosing timber with this certification, you can be assured that you’re sourcing a sustainable solution. In contrast to this, if this certification is not there, it could mean the timber you’re using for your wall is unsustainable.

FSC

Timber also works to reduce the planet’s carbon by storing it. In recent studies, it has been found that timber holds up to 95% of carbon even after being in a landfill for 30 years (OneFortyOne). When a forest is properly managed, timber can be one of the most effective carbon-storing materials.

Although the right timber can be sustainable, there are downsides to using it as a structural solution:

Interbloc gives you options where timber doesn’t

Although timber does have its benefits for retaining walls, overall Interbloc is the standout performer. With its modularity, sustainability, and durability, you will have your retaining walls stand for decades.

For long-lasting retaining walls, reach out to us for a quote.

The amount of waste New Zealanders are sending to landfill is increasing. In the last decade, disposal in municipal landfills has increased by 48% (Ministry for the Environment). In Auckland alone, 1.6 million tonnes of waste is sent to landfill - more than 1 tonne per person (Auckland Council).

Only a small fraction of New Zealand's waste is reused or recycled because

One of the tools that local councils and central governments are using to combat this is waste levies.

What are waste levies?

To help New Zealand take responsibility for the waste they produce, tools like waste levies are being implemented.There are 2 main aims of creating waste levies: to raise revenue for initiatives that aim to reduce and encourage resource recovery, and recognize that waste disposal imposes costs on the environment, society, and the economy (MFE).

Over a duration of 4 years, the levy will be progressively increased to allow for behavioural change and system implementation.

There are 4 types of landfill that the central government has levies for or is adding waste levies to. These are municipal waste (current), construction and demolition waste (current), managed fill, and controlled fill. By July 1st 2024, the waste levy for municipal waste will be $60 per tonne, construction and demolition waste $30 per tonne, managed fill $10 per tonne and controlled fill $10 per tonne.(Waste Management).

Waste Levies

How waste levies are distributed in New Zealand

Revenue raised from the levy is to be spent on waste minimisation activities. The process of how it needs to be spent:

How the Waste Levy is Distributed

THE WASTE MINIMISATION FUND

This fund is used to build recycling infrastructure across New Zealand. A long-term plan for managing the country’s waste and how the increased revenue will be spent is being strategized by the Government (EnviroWaste). Likely, this will include large scale investments in recycling and other alternatives to landfill combined with smaller-scale initiatives for innovative approaches and increasing public awareness.

Envirocon’s Role in Waste Levies; Using Product Stewardship

Envirocon is the concrete industry’s answer to eliminating waste. In 2015 we created the Envirocon Product Stewardship Scheme with New Zealand’s leading concrete suppliers. Accredited by the Minister for the Environment under the Waste Minimisation Act 2008, wet excess certified concrete is upcycled - eliminating a waste stream and reducing associate cost.

The future of waste levies in New Zealand

As of June 2022, revenues raised from the landfill levy is about $36million per annum - and it has to be spent on waste minimisation. Increases in the waste levy is projected to reach between $220 and $247 million by 2023 (Ministry for the Environment). This gives more revenue for waste management and waste minimisation activity.

For New Zealand to have a low-waste future, there is a high demand to develop large-scale resource recovery infrastructure. Rather than exporting our waste overseas, we need to deal with it ourselves. Some of these actions (that use revenue from the waste levies) may include:

Envirocon’s Interbloc range helps achieve waste minimization goals

Interbloc refuse and recycling bins

Interbloc’s refuse and recycling bins can help New Zealand get closer to achieving these actions. By choosing Interbloc for resource recovery centers, a host of benefits are obtained:

LOW CARBON, ZERO WASTE

Every year about 300,000 tonnes (or seven sky towers) of high quality, certified concrete ends up as waste. Interbloc helps to change that with its CarbonSmart system, closing the loop on concrete waste for good.

Because Interbloc is made for wet, certified excess concrete it’s low carbon, zero waste. Backed by an EPD, Interbloc supports the goals of reducing waste as well as other acts like the Waste Minimisation Act 2008, Zero Carbon Act, and the Paris Climate Agreement.

By using Interbloc for your refuse and recycling bins, you are helping New Zealand reduce was in 2 ways:

  1. The wet certified excess concrete is used to create Interbloc, diverting from landfill (and avoiding a waste stream)
  2. The blocks are used to create the infrastructure to manage New Zealand’s waste

MADE FOR DECONSTRUCTION

Interbloc is a modular precast construction system, meaning blocks can be easily stacked and unstacked. This makes the Interbloc system, one that’s purpose-built for deconstruction. Thanks to the interlocking shear key in every block, blocks can be sold back to us via the buyback guarantee after you’ve finished with them.

Interbloc interlocking gif

Combining the low-carbon elements of Interbloc along with its ability to deconstruct, a circular economy is created.

The modularity of Interbloc means that it can grow or shrink to New Zealand’s waste needs. It can be used initially to sort and store waste, but if there is a reduction in waste and a lack of need for bins, you can non-destructively dismantle the blocks and stop more waste from entering New Zealand’s landfills.

CODE COMPLIANT

Interbloc is backed by comprehensive, code-compliant, structural design methodologies. If needed, PS1s can also be issued.

To fit different engineering and council requirements, there are many configurations and solutions available with Interbloc. The modular system can be vertically reinforced to form a cantilever wall which increases the loads the walls can take.

By using Interbloc for waste management & minimisation structures, you’ll have a strong and safe solution that will stand for years to come.

HIGH PRODUCTIVITY

New Zealand needs to act fast to effectively reduce waste; Interbloc can help.

From the start, Interbloc has been designed to be a high productivity precast modular wall system. This means you can install more walls with less effort compared to other systems. Achieving the productivity of 160m2 of wall per day (with 2 people), is all done with the interlocking shear key.

Choose Interbloc to help New Zealand become more sustainable
New Zealand needs a waste management and minimsation solution that is adaptable, sustainable, and strong. Interbloc offers this and more.

Reach out to us today for a quote.

The increasing demand for sustainable and resource-efficient construction processes presents significant opportunities for specifiers, suppliers, and contractors to transform their business practices for the better. This demand is fueled by several factors, including the government’s desire to reduce carbon emissions. The ultimate goal of sustainability is to ensure that we do things today in a way that can be sustained for the future. At Envirocon, we understand that these changes can be painless, practical, and cost-effective, as we have successfully implemented them for the past 18 years.

A Practical Approach to Sustainable Construction

Implementing sustainability doesn't have to be a daunting task, but it often requires partnering with experts in the field. This is where Envirocon comes in. Approximately 300,000 tonnes of high-quality, certified, wet concrete - equivalent to seven Sky Towers worth - would go to waste because it cannot be used before it cures. Envirocon was established to eliminate this waste. We work closely with some of New Zealand's largest concrete companies to permanently close the loop on concrete waste by transforming excess high-quality concrete into precast concrete products that can be reused repeatedly. Our expertise lies in matching insecure and volatile supply with mass market demand. We do the hard work on sustainability so our customers can unlock exceptional benefits.

Accreditation Matters, Avoid Greenwashing

When there is a demand for a solution that is not readily available, there may be a temptation to offer an inadequate response, which is known as greenwashing in the sustainability world. Greenwashing occurs when a proposed solution may sound good but ultimately fails to make a significant impact. Specifiers, contractors, and asset owners need to feel reassured that their sustainability initiatives are genuinely effective.

Envirocon serves as an example of how to achieve this. Our company operates New Zealand's only construction-related Product Stewardship Scheme, which has been accredited by the Minister for the Environment under the Waste Minimisation Act 2008, demonstrating our zero-waste approach to handling excess concrete. Additionally, we have a registered Environmental Product Declaration that establishes the ultra low embodied carbon profile of our blocks. These two independently verified accreditations provide a comprehensive sustainability solution for contractors striving to fulfill complex and ambitious sustainability objectives.

Envirocon's Circular Economy Process

It’s Only Going to Get More Important

By putting carbon reduction plans into action, we can help mitigate further impacts including slowing down global warming. The average global temperature is projected to increase by 1.5°C above pre-industrial levels by 2040, and without immediate and significant action, the impacts of climate change will only become more severe (Intergovernmental Panel on Climate Change).

Creating more resource-efficient practices also supports a more sustainable planet. By shifting focus to resource efficiency, it’s estimated we can reduce the use of raw materials by 60% and the costs of waste management by up to 90% (European Commission). Choosing solutions that enable the ability for resource efficiency will help achieve these estimates.

Sustainable construction is a topic of growing importance, and the New Zealand government has enacted two critical pieces of legislation regarding carbon reduction and resource efficiency: the Zero Carbon Act and the Waste Minimisation Act.

Enacted in 2019, the Zero Carbon Act sets a target for New Zealand to achieve net-zero carbon emissions by 2050 and establishes an independent climate commission to provide guidance on accomplishing this goal. The Waste Minimisation Act, enacted in 2008, promotes waste reduction, reuse, and recycling, with the goal of conserving resources.

Envirocon and its product ranges demonstrate how compliance with these Act’s can be achieved without needing to reinvent the wheel;

Practical Sustainable Construction Case Studies

CITY RAIL LINK

The City Rail Link - a huge infrastructure project - aim’s set the benchmark for developing sustainable infrastructure in New Zealand. Following the ISCA framework, carbon reduction and resource efficiency are some of the projects’ highest priorities.

City Rail Link

Envirocon and the Link Alliance started working together as soon as construction commenced in 2019. Link Alliance was able to get certainty excess concrete was diverted from landfill - helping to achieve the zero waste goals of the project, and at the same time reuse low embodied carbon blocks on the project.

Nick Braxton is the Principal Sustainability Advisor for the Link Alliance. He explains that the Alliance has a “zero waste to landfill” policy that makes Envirocon a perfect partner for them. “Our non- linear approach to waste management means we’re using excess concrete for a wide range of purposes instead of sending it to landfill,” he says.

As the project comes to an end, the intention is to take the blocks back off the project and repurpose them for other structures.

WATERVIEW TUNNEL

Interbloc Settlement Ponds for the Waterview Tunnel

The $1.4 billion project, the Waterview Connection, includes the construction of 4.8km of six-lane motorway. To achieve this, extensive tunnelling needed to be conducted resulting in plenty of excess water.

Interbloc was contracted to form the settlement ponds for this project, largely due to the engineering capacity of the concrete blocks and that they could be removed easily after the project finished via the buyback guarantee. 

By using Interbloc for their settlement pounds, the Waterview Connection was able to be resource efficient.

Key Lesson - Sustainability Doesn't Have to be Hard

Envirocon demonstrates how partnering with the right suppliers can deliver innovative and comprehensive sustainable construction solutions which don’t necessarily need to be difficult, expensive, or lower quality.

We are excited to announce that we have developed a new program to recognize and reward contractors who have demonstrated exceptional skill and expertise in the installation of our Stonebloc range. Our program has four levels: Bronze, Silver, Gold, and Platinum.

As a contractor, becoming a Stonebloc Accredited Contractor is a great way to differentiate yourself from other contractors in the industry. By completing the training and meeting the required criteria, you will be demonstrating to your clients that you are fully qualified to install Stonebloc to the highest standards. Additionally, by having a proven track record of delivering outstanding results, you will be showing your clients that you are committed to providing the best possible service.

Dan, Tex, and Louesito from Ground and Pound with their certificates after completing their Stonebloc Accredited Contractor's training.

(Dan, Tex, and Louesito from Ground and Pound with their certificates after completing their Stonebloc Accredited Contractor's training)

But the benefits don't stop there, as an Accredited Contractor, you will also benefit from a range of exclusive perks and support, such as:

 

It's important to note that Stonebloc isn't the best fit for every retaining wall contractor. We also have ambitious growth plans so we want to partner with contractors that share our ambition. Below is a list of what we're looking for in a Stonebloc Contractor:

If you are interested in becoming a Stonebloc Accredited Contractor, please visit contact us for more information on the requirements.

We look forward to working with you and helping you to grow your business.

Waterproofing an Interbloc system, made up of precast concrete blocks, is a crucial step in ensuring the longevity and durability of the structure. Interbloc systems are widely used in settlement ponds, retaining walls, bins, and bunkers, among other applications.In this blog, we'll discuss how to properly waterproof an Interbloc system, why it is important, and why we recommend using sealants for most Interbloc structures.

How to seal an Interbloc structure

  1. Use a suitable sealant: The first step in waterproofing an Interbloc system is to apply a sealant to the interlocking layers of the blocks. The sealant should be applied in layers to ensure complete coverage before proceeding to the next step.
  2. Seal the joints: The joints between the precast concrete blocks in an Interbloc system are a common point of water ingress. To prevent water from entering through these joints, they should be sealed with the same sealant. The sealant should be applied to the joint in a continuous bead before the structure is put into use. It is important not to apply too much sealant to the joint as it can cause the precast concrete blocks to shift and move, leading to structural issues.
  3. Regular maintenance: Waterproofing an Interbloc system is not a one-time process. It is important to conduct regular inspections and maintenance on the system to ensure that the waterproofing remains effective. This includes checking for any cracks or damage to the sealant.

Blue circle around Interbloc walls' interlocked joints showing where you would put sealant for waterproofing

(The highlighted are shows an example of where you'd add sealant if you wanted to waterproof your Interbloc structure)

Why it’s important to waterproof

Waterproofing an Interbloc system is vital because it helps to protect the structure from water damage. Water ingress can cause the system to weaken and deteriorate over time, leading to costly repairs or even complete failure. Waterproofing also prevents structural damage such as rusting of steel reinforcement.

Why we recommend sealants for most Interbloc structures:

Sealants are an excellent choice for waterproofing Interbloc systems because they are easy to apply and can provide long-lasting protection. Sealants are flexible and can move with the structure, which helps to prevent cracking and damage to the waterproofing. Finally, sealants are a cost-effective solution for waterproofing Interbloc systems, making it an attractive option for those on a budget.

Waterproofing the Waterview Tunnel’s Settlement Pond

A well-known Auckland roading project, the Waterview Connection, needed settlement ponds to store and treat liquid from the tunnelling process. Interbloc was chosen for it's combination of engineering and modularity. 

In order provide a watertight solution, sealant was added to the joints of the 1.8m high walls. It was sealed using shotcreate, allowing for a temporary solution to hold the liquid. When the settlment ponds were no longer needed, the sealant was removed and the blocks sold back to us via the buyback guarantee. 

The sealant added to the Waterview Tunnel walls to keep water at bay

By taking the steps to waterproof an Interbloc system using a waterproofing sealant, and not applying too much of it, you can ensure that the Interbloc system will remain in good condition for many years to come.

Are you in the events industry and looking for a way to add brand identity and functionality to your concrete blocks? Our new 'brand your block' service is here to help.

We can customise the look of a block so suit your brand by sticking decals to the side of the blocks. These high-quality decals are perfect for branding and customizing all of our counterweight and bollard ranges, from 10kgs to 1500kgs. They're great for a variety of events, including weddings, parties, and corporate events. With our decals, you can transform your blocks into unique and personalized pieces that will make your event stand out.

Examples of decals

(BollardBloc on the left and a decal for Tomo's Saws and Mowers on the right)

Here are a few ways you can use our 'brand your block' service:

The decals are made with a special adhesive that ensures they'll stay put with a 12 month warranty. They are easy to apply and remove. 

We offer both hire and buy options for the concrete blocks. If you're wanting to hire, any decals will be yours and are not part of the hiring process. Buying online will be offered soon but for now contact us, we will be able to help you to buy bundles of blocks with customised decals that fit their brand.

So why settle for plain, boring blocks when you can add some style and functionality with our decal service? Contact us today to start branding your blocks, elevating your space with unique and personalized concrete blocks for any occasion.