We've got some exciting updates to share from the Envirocon team. This summer, we rolled up our sleeves and got to work on a major overhaul of our Penrose factory. The result? A revamped layout that's all about boosting efficiency, safety, and sustainability in the world of ready mix concrete.
Here's the lowdown: we've implemented a slick one-way traffic flow system within our factory grounds. This simple change might not sound like much, but it's making a world of difference. By minimising truck reversing and simplifying traffic flow, we're slashing turnaround times and keeping operations running smoothly. This has a big impact on our members who rely on fast efficient truck turn around times.
But that's not the only improvement we've made. We've also ramped up our factory's capacity, going from handling just two trucks at a time to up to five at a time! That means we can process more concrete, faster, and with fewer bottlenecks along the way.
Of course, safety is always top of mind for us. By eliminating truck reversing and improving visibility, we're reducing risks and creating a safer work environment for everyone involved. And by separating traffic within the factory, we're adding an extra layer of protection to ensure smooth operations.
But wait, there's more! We've got some other exciting projects in the pipeline too. Keep your eyes peeled for updates on two new locations opening soon, as well as some handy tools to help track zero waste in the construction industry.
About Envirocon:
Envirocon is a leader in sustainability, zero waste, and circular economy solutions. Envirocon is a Product Stewardship Scheme Accredited by the Minister for the Environment under the Waste Minimisation Act 2008, we're leading the charge in sustainable solutions for excess ready mix concrete.
From transforming excess concrete into reusable precast elements to diverting thousands of tons of waste from landfills, we're committed to making a positive impact on the environment - including reducing carbon emissions by an estimated 2.8mill kgCO2e over the next twelve months. With a dedicated team spread across the country, we're working tirelessly to build a greener, more sustainable future for the construction industry.
Join us on our journey towards a zero-waste tomorrow.
3 Concrete Mix Options Offer You More Choice
We're excited to announce the launch of Total Precast Solutions (TPS), an initiative that gives you the ability to minimise embodied carbon impact without comprimising the technical requirements. TPS offers three concrete mix options across all Envirocon product ranges, including Interbloc and Stonebloc.
 | Ultra Low Carbon: This is the standard choice, with an EPD-certified ~ 97% reduction in embodied carbon compared to standard concrete mixes. |
 | Low Carbon: This option is available for those who want more certainty with their concrete mix. It incorporates a 30% fly ash replacement 30MPa 19mm aggregate mix, resulting in a ~30% reduction in embodied carbon compared to standard mixes. |
 | Standard Mix: This mix is ideal if you have specific manufacturing timelines and/or technical requirements. This option features a standard 30MPa 19mm aggregate mix with no carbon reduction. |
The Benefits of TPS
TPS gives you and the environment access to many benefits:
- Improved Consistency: TPS gives you confidence to specify Envirocon blocks for your projects. Giving you the choice of concrete mixes means you can control design outcomes more effectively.
- Improved sustainability: TPS helps you meet your sustainability targets by providing options for ultra-low-carbon and low-carbon concrete mixes.
- Reduced embodied carbon: TPS can significantly reduce the embodied carbon of construction projects. The most effective is the ultra-low-carbon-mix followed by the low-carbon mix.
Greater design flexibility: TPS allows you to balance the technical requirements of consistent concrete mixes against potential sustainability impacts.
Envirocon's Commitment to Sustainability
Envirocon is a leader in construction sustainability. Our comprehensive circular economy approach incorporates:
- Accredited product stewardship
- Design for deconstruction
- Low-carbon products
- A registered EPD
- A unique buyback guarantee
Giving You Concrete Choices & Easy Sustainability Solutions
Adding TPS expands your options, making it easy for you to have well-engineered and sustainable choices. With TPS, you can control design outcomes, reduce embodied carbon, and make informed decisions about your project's environmental impact.
If you're ready to take advantage of Envirocon's sustainable concrete solutions and TPS's flexibility, reach out to our team today to discuss how we can work together on your next project.
Stonebloc Expands Product Offering with Innovative Wedge and Stair
When we launched Stonebloc in 2015, it was in response to the demand for a longer lasting, better looking, and faster to install residential retaining wall product. Since then we’ve remained committed to innovation, and . We're proud to announce the launch of two new products; the Stonebloc Wedge Block and the Stonebloc Stair Block.
These new products round out the range allowing curves to be built into Stonebloc walls, and more importantly eliminating the need for boxing and pouring steps instiu on site.
Stonebloc Wedge Block
Creating curved walls is simple with Stonebloc's Wedge Block. Available in left and right, and standard and flat top variations, this block offers the same benefits as seen across the whole Stonebloc range:
- Easy installation: Two labourers can build up to 120m2 of wall per day. The self-aligning and interlocking elements of these modular concrete blocks make it quick to create retaining walls.
- Vertical walls on the boundary: Stonebloc walls are built vertically on the boundary with no incline, maximising land availability.
- Designed for Deconstruction: Stonebloc is a modular concrete block building solution. This means it's just as easy to deconstruct a wall for maintenance as it is to build it.
- Timeless Aesthetic: The split stone facia is designed to work across many different designs with a timeless finish.
- Durable concrete: Made from a minimum 20MPa concrete, you can trust these interlocking blocks are designed to withstand the elements.
- Sustainability: By using our Total Precast Solution offering, you can choose one of three concrete mixes and control the reduction in embodied carbon.
Stonebloc Stair
Like the Stonebloc Wedge Blocks, the Stair Blocks also offer the same benefits as the rest of the range. Two benefits that are specific to the Stair Blocks are:
Benefits of the Stonebloc Stair include:
- Complement Stonebloc retaining walls: Often there are challenges associated with traditional methods of construction stairs alongside retaining walls, which often involve costly and time-consuming processes like concrete pouring or the use of less durable timber. Stonebloc Stair Blocks have been designed to complement the whole retaining wall, extending the split stone facia throughout the design.
- Code-compliant rise and tread dimensions: These blocks are designed to meet all relevant building codes.
Bespoke Stonebloc Retaining Wall Designs
With the addition of the Stonebloc Wedge Block and the Stonebloc Stair, Stonebloc you now have the ability to create more bespoke Stonebloc retaining wall designs.
To start using the Wedge and Stair Blocks in your Stonebloc designs, reach out to us today
Interbloc's Had a Facelift!
Interbloc+ is Purposely Designed for MSE Walls
Interbloc+ is designed for MSE walls (although, you can still use these concrete blocks for gravity retaining walls). MSE is a method of reinforcing a wall to withstand high loads. It’s common with bridge culverts and retaining walls above 2.4m. Essentially, it ties the wall elements (Interbloc concrete blocks), to the retained soil using a geogrid matt.
MSE is a faster, more cost-effective, and stronger solution when building retaining walls with large loadings. There are numerous different MSE systems out on the market, however its only when MSE and Interbloc are combined that you truly get the unique benefits of speed, durability, and flexibility.
Benefits of Interbloc+
Interbloc+ walls offer a number of benefits over traditional retaining walls, including:
- Enhanced aesthetics: A split stone facia means the structures you build with Interbloc+ look great and are also well-engineered.
- Durability: Interbloc+ MSE walls are designed to withstand the harshest of environmental conditions, and they are resistant to damage from earthquakes and other natural disasters.
- Rapid construction: Interbloc+ MSE walls can be installed quickly and easily, and the construction process is predictable and repetitive.
- Reduced environmental impact: Interbloc+ with TPS provides a combination of low carbon and high quality
MSE-Wall Specific Benefits:
- Extreme wall heights: Interbloc+ MSE walls can be built to heights of up to 20 metres, making them ideal if you're designing walls with extreme heights.
- Extreme loads can be carried. Interbloc+ MSE walls can carry heavy loads, such as bridge abutment footings or cranes.
- Built-in Geogrid Technology. Interbloc+ incorporates a unique built-in geogrid technology that enhances the overall stability and reinforcement of retaining walls.
Interbloc+ Retains Core Features
Despite its enhanced aesthetics and MSE offering, Interbloc+ retains the core features that have made Interbloc a trusted choice across multiple industries.
- Installation up to 5 times faster than traditional products. Interbloc can be installed at a rate of 160m2 of wall per day with two labourer.
- Interlocking shear key. This feature ensures compliance with the NZS3101 code Part 1 2006 Section 7.5 requirements.
- Up to 97% reduction in embodied carbon compared to other concrete construction systems. Made from high-quality, wet excess concrete, Interbloc is a low carbon, zero waste construction system. It's independently verified by an EPD.
- A minimum of 20MPa concrete or greater. Interbloc utilises high-strength concrete for exceptional durability and structural integrity. Specific concrete mixes can be requested through our Total Precast Solutions offer.
Interbloc+ - Combining Engineering, Aesthetics, and Sustainability.
Interbloc+ is a great choice for your next project. It is a well-designed, aesthetic, and durable retaining wall solution that offers the same benefits and more as Interbloc.
Request a quote today to see how Interbloc+ can help you with your next project.
Finding the right storage solution is vital for New Zealand farmers. Interbloc provides a range of customizable storage solutions that are made for the rural industry. With interlocking concrete blocks forming the modular system, durability and design flexibility are given. Combining this with weather protection, a buyback guarantee, and sustainability accreditation, Interbloc works for the 21st century farmer.
Challenges with Rural Storage
WORSENING WEATHER
New Zealand’s farmers are facing significant weather challenges - from too much rain to drought and from hail to excessive heat (Deloitte). In the first half of 2023 alone, farmers have been impacted by weather events like Cyclone Gabrielle (which caused about half a billion dollars worth of production mainly in agriculture and horticulture). Our rural industry is heavily reliant on the environment, and events like droughts, floods and storms are adding to the list that farmers need to grapple with. With severe weather events increasing, challenges are exacerbated leading to reduced yields, crop failures, and increased costs to farmers (passing on to the New Zealand consumer).
INFLEXIBLE DESIGNS
With traditional farming solutions like sheds and silos, inflexible designs can result in inefficient use of space and wasted resources. Storage solutions that are inflexible make increasing or decreasing grain or feed capacity difficult. Down the line, this can cause revenue loss and reduced productivity.
LABOUR SHORTAGES
Like many instances in New Zealand, the agricultural sector is facing a labour shortage (one of the largest in history). In dairy farms alone, there is an estimated shortage of between 4000 and 6000.
"Late last year DairyNZ did a survey and it had 22 percent of dairy farmers who employ staff saying that they were short-staffed, and on average it was by 1.2 people."
-Dairy NZ Spokesperson Jane Muir
The future of rural storage is modular
In modular construction, building components are made off-site. These components are then transported to site, where installation of the complete structure takes place (Science Direct). Modular construction boasts a list of benefits, all being valuable to the rural industry. From faster installation and higher productivity to less waste and lower costs, modular construction is the way forward. Interbloc is one of these modular systems, giving you these benefits.
Interbloc can be used for a variety of rural applications, most commonly those is the industry build:
- PKE/Feed bins
- Fertiliser Bins
- Silage Bunkers
- Retaining Walls
PKE/Feed Bins
The ability to change the capacity of PKE/Feed bins is important. Interbloc’s modular design allows you to easily change up the capacity of the bin - a 400 tonne bin can be increased to 450 tonne by simply adding an extra layer of blocks.
All in all, Interbloc PKE bins help modern NZ farmers provide a secure and convenient way to manage palm kernel extract (PKE). Getting this storage right improves the feed quality, increases feed efficiency, and saves time on feeding operations.
For best results from an Interbloc PKE/Feed Bins, follow these tips:
- For easier installation, maintenance, and operations, we’d recommend placing your PKE/Feed bin on a concrete pad. Typically around 160-300mm thick depending on the height of the wall and ground conditions
- For a seamless joint between the base of the wall and concrete pad, use Interbloc Flat Bottom Blocks. They come in 1200, and 1800mm lengths
- For waterproofing, use a sealant between the interlocking joints of the Interbloc wall layers
- For weather protection, add a roof to your bin. Typically for these applications, we’d recommend a retractable roof for great useability
Fertiliser Bins
Incorrect storage of fertiliser results in unnecessary wastage, in some cases up to 25% – this is an expensive problem. Getting fertiliser storage right ensures the product retains quality, maximizing their effectiveness in promoting crop growth and yield. Ultimately, this contributes to the growth and sustainability of the New Zealand rural industry.
Interbloc's fertilizer bins address several challenges that modern farmers face. Firstly, with worsening weather patterns, secure storage of fertilizers becomes critical to prevent loss due to flooding or waterlogging. Secondly, with labour shortages, Interbloc's bins offer a modular and easy-to-assemble design, reducing the need for extensive manual labor during installation and maintenance.
Lastly, traditional storage designs can be inflexible and unsuitable for different types of fertilizers. Interbloc's bins, on the other hand, can be customized to meet specific storage requirements, making them a versatile and practical option for modern farmers.
For best results, follow the PKE/Feed Bins tips and:
- Having adequate heat control is vital for fertsilier. Consider adding quality ventilation systems to your Interbloc storage, allowing to maintain a high quality product
- Combine the thickness of Interbloc’s 600mm blocks, roof, and hinged doors to create a solution that limits light exposure. This will also maintain a high quality product
- For bulks fertsilier storage bins, consider adding the 1200 base block to your design. These concrete blocks helps to increase the wall’s load capacities.
Silage Bunkers
Interbloc's silage bunkers offer an efficient and reliable storage solution for New Zealand farmers. The bunkers are designed to withstand the harsh weather conditions that are common in the country, providing long-lasting protection for silage. The modular design of the bunkers also allows for easy assembly and customization, enabling farmers to adapt to changing storage requirements and optimize their silage production.
Before designing your bunker, understand what you want to achieve. Ask yourself these questions
- How much feed do you need to store immediately?
- What are your future plans for the farm?
- How many cows do you have, and how often do you intend to feed them?
- Ensure that you feed across the face of the bunker at least every three days; cutting into the face at 15 – 20cm
More Interbloc Benefits For the Rural Industry
BUYBACK GUARANTEE
The buyback guarantee gives you peace of mind, allowing you to build for now and plan for the future. If you no longer need your blocks on-site, you can sell them back to us. The offer is:
- We’ll buy back Interbloc manufactured and sold blocks only
- The minimum price is calculated as a percentage of the original purchase price, quality, and age of the block as set out in the table below.
- Blocks originally sold as seconds, rejects, special blocks, flat top, flat bottom, and capper blocks are excluded, however, we may still choose to offer a buyback on these blocks on an adhoc basis.
- The guarantee is only available to the original purchaser and is not transferable
- We may, at our discretion, offer different rates than shown in the table below
LONG-LASTING, STRONG, CERTIFIED CONCRETE
With heavy machinery frequently operating on a farm, you need a storage solution that’s strong. All Interbloc precast blocks are made with a minimum of 20 MPA and are 600mm thick. These concrete blocks also provide a strong solution for the worsening weather conditions across the country.
You can combine Interbloc with vertical reinforcing and/or geogrid for a stronger solution. For these options, you’ll need an engineered design.
FAST INSTALLATION & NON-DESTRUCTIVE DISMANTLING
160m2 of wall can be installed per day with Interbloc, making for a quick solution. This is all down to the modularity of the Interbloc system, giving you the ability to build storage for worsening weather conditions.
By using Interbloc’s modular concrete blocks, you can build strong structures in a fraction of the time compared to traditional storage methods. This means you can do more with less, reducing dependence on manual labour and freeing up time for other essential tasks.
If you need to adapt your designs, or no longer need your blocks, Interbloc can be non-destructively dismantled.
SUSTAINABILITY
We’ve made sustainability easy so you can focus on your day-to-day operations and future planning. Largely, this is done with our low carbon, zero waste interlocking concrete blocks - Interbloc. Independently verified by an EPD, you don’t need to drastically change what you’re doing on the farm to reach sustainability requirements.
Here’s the sustainability acts that Interbloc works with so you don't have to:
- Waste Minimisation Act
- Zero Carbon Act
For 2023 and beyond, Interbloc works rural storage
Interbloc continues to offer practical and reliable storage solutions for the rural industry in New Zealand. With the increasing unpredictability of weather patterns and challenges such as labor shortages, Interbloc's modular and durable designs offer a flexible and sustainable solution. From fertilizers and animal feed to silage and general storage, Interbloc's concrete blocks and bins are designed to withstand the harshest conditions and provide long-lasting protection. As the industry continues to evolve, Interbloc's commitment to quality and innovation ensures that they will remain a trusted partner for farmers seeking efficient and effective storage solutions.
When it comes to building retaining walls, sea walls, or other large-scale structures, concrete blocks are often the go-to solution due to their durability and strength. However, choosing between large modular concrete blocks or small modular concrete blocks can be tricky. Large blocks may be more efficient for quickly constructing a large wall, while small blocks can offer more flexibility and customization options. In this blog, we will compare both and explore the benefits and drawbacks to help you make an informed decision for your next project.
What are modular concrete blocks?
Modular blocks (also known as interlocking blocks), are precast concrete elements that are designed to fit together seamlessly. They come in a variety of sizes and shapes and can be used in a wide range of construction projects.
With modular construction, comes design flexibility. No matter what you’ve chosen, you can often use large or small blocks for retaining walls, seawalls and erosion protection. Their interlocking design allows them to be stacked on top of each other without the need for mortar or other adhesives, making them quick and easy to install. Made from concrete, blocks are durable, weather-resistant, and require minimal maintenance. This makes them a popular choice for a variety of commercial and residential applications.
Large and Small Modular Block Retaining Walls
Large modular concrete blocks have to be installed with machinery as they’re too heavy/big to place by hand. Depending on what range you choose, blocks can weigh from 150 kgs to over 1500 kgs (1.5 tonnes). Because of their size and weight, they are often used instead of traditional options like tilt slab or timber, as they can be assembled quickly and with less labor inputs. The Interbloc and Stonebloc systems have large modular concrete blocks as the primary element in their ranges.
Interbloc Installation
Stonebloc Installation
In many instances, small modular blocks can be installed by hand. Ranging from around 100-300mm wide and weighing from 8-30 kgs, heavy machinery is not often needed for installation. Like their large block counterparts, you can use these blocks for larger structures such as tall (above 2m) retaining walls and seawalls. They are more catered to smaller projects, however. Commonly used in landscaping projects, garden walls, and other smaller scale structures. Despite their smaller size, small modular concrete blocks are still durable and long-lasting, making them a practical choice for a variety of residential and commercial projects.
Features of Large and Small Modular Blocks
- Size and Weight: Large modular concrete blocks are significantly larger and heavier than standard concrete blocks, making them capable of withstanding high amounts of pressure and weight. Small modular blocks can still achieve much of the outcomes that larger blocks can, they may just need more components to do so
- Interlocking Design: Much like LEGO, these blocks have an interlocking design that allows them to be stacked and locked together. This feature makes them quick and easy to install, saving time and labour costs. In the case of Interbloc and Stonebloc, the combination of their size, weight, and interlocking shear key allows overturning forces to be resisted
- Durability: Concrete is designed to withstand harsh weather conditions, erosion, and other environmental factors, making them long-lasting and low-maintenance. For Interbloc and Stonebloc, there is a minimum 20 MPA.
- Versatility: These blocks can be used for a wide range of applications for various industries including construction, civil, rural, and more.
- Cost-Effective: Overtime, the cost of large modular blocks can be more efficient compared to traditional systems. With lower maintenance requirements and non-destructive dismantling you can build for now and plan for the future.
With these blocks, try building:
| Application | Large Modular Concrete Blocks | Small Modular Concrete Blocks | Image Example | |
| Gravity retaining walls | ✅ | ✅ |  | |
| MSE retaining walls | ✅ | ✅ |  | |
| Seawalls | ✅ |  | ||
| Aggregate Bins | ✅ |  | ||
| PKE/Feed Bins | ✅ | | ||
| Fertilizer Bins | ✅ | | ||
| Culverts | ✅ |  | ||
| Silage Bunkers | ✅ | | ||
| ✅ |  | ||
| ✅ |  |
Pros and cons of Large and Small Modular Blocks
LARGE MODULAR BLOCKS
Speed of installation is one of the largest benefits you’ll gain with a large modular concrete block. With our own ranges - Interbloc and Stonebloc - two people can build from 120-160m2 of wall per day. Adding to the installation efficiency, you don’t need to add mortar or other adhesives. Being made of strong concrete (for our blocks, it’s a minimum of 20 MPA), large modular concrete blocks are resistant to harsh weather conditions, erosion, and other environmental factors . With worsening weather throughout New Zealand, this will reassure you that your structures will be long-lasting.
Typically, large modular concrete blocks have low maintenance requirements making them a practical and sustainable option. Interbloc is more sustainable than the standard large blocks. Made for high-quality certified wet excess concrete, they’re low carbon, zero waste (verified by an EPD). Overall, the combination of these advantages makes large modular concrete blocks an attractive option for construction projects that require a durable, efficient, and cost-effective solution.
Access and design flexibility are the two main areas where large modular concrete blocks perform weakly. With blocks being around 1m long and up, equipment large enough to lift the blocks is needed. Getting this machinery on-site requires space for loading/unloading, ruling out tight sites (and therefore large modular blocks).
For larger concrete blocks like Stonebloc, heavy machinery like an excavator is needed for installation.
Depending on the range that you choose, large modular concrete blocks may not be able to accommodate complex curves or angles. This will result in changes to a design or custom blocks to fit the project - both which Interbloc and Stonebloc can assist you with.
SMALL MODULAR BLOCKS
Maneuverability and flexibility are the biggest advantages to small modular concrete blocks. Although you can build large developments with this, small projects can be more difficult to use. Additionally, small modular concrete blocks are highly versatile and customizable, coming in a variety of sizes, shapes, and colors, allowing for creative design options. Another advantage of small modular concrete blocks is their durability. They are made of high-quality concrete materials that can withstand harsh weather conditions, erosion, and other environmental factors, making them a long-lasting option for construction projects. Finally, small modular concrete blocks are cost-effective, as they require less labor than traditional masonry construction methods, resulting in cost savings for construction projects. Overall, the combination of these advantages makes small modular concrete blocks a practical and efficient option for construction projects that require a durable, cost-effective, and customizable solution.
To achieve great heights and lengths of retaining walls, small modular blocks can be inefficient. With smaller facial m2, installation for larger projects can be labored. Coupling this with some smaller block solutions needing fiberglass pins per block for vertical reinforcing, you may have an installation with a long duration (costing you time and money).
Comparison of Large and Small modular concrete block retaining walls
Both large and small modular block options have their advantages and disadvantages. However, large modular concrete blocks offer several distinct advantages that make them a superior option for many construction projects.
One of the main advantages of large modular concrete blocks is their size and weight. While this can be seen as a potential disadvantage, their size and weight also make them highly durable and able to withstand harsh weather conditions and environmental factors. Large modular concrete blocks are ideal for large-scale projects that require significant structural support, such as retaining walls, sea walls, bins, and bunkers.
In addition to their durability, large modular concrete blocks also offer an efficient and cost-effective solution for construction projects. Their easy and quick installation process, requiring less labour than traditional poured concrete construction, makes them a practical option for projects with tight timelines and budgets. Additionally, their interlocking design eliminates the need for mortar or other adhesives, resulting in a faster and more efficient assembly process.
Large modular concrete blocks are also highly versatile, coming in a variety of sizes, shapes, and colors. This allows for creative design options and customization for specific project requirements. Finally, large modular concrete blocks are a low-maintenance option, requiring minimal upkeep and providing a long-lasting solution for construction projects.
While small modular concrete blocks may have some advantages, such as ease of installation and high customizability, they may not be suitable for larger-scale projects that require significant structural support. Additionally, their interlocking design may limit the complexity of design options available.
In conclusion, large modular concrete blocks offer several advantages that make them a practical and efficient option for many construction projects. Their durability, easy installation process, versatility, and low maintenance requirements make them a superior option over small modular concrete blocks for large-scale projects that require significant structural support.
Government has a clear goal of increasing housing density within urban areas. Higher density housing often requires extensive retaining to flatten land and make the construction of houses easier. There is also an increasing focus on the environmental effects of how we build, and the sustainability of the materials we use.
Why are retaining walls needed?
Retaining walls are used to hold back a bank of earth when there is a change of level. There are many types of retaining walls including gravity, cantilever, and mechanically stabilised earth (MSE) (Build Magazine).
Common examples of using a retaining wall include:
- When there is a sudden & steep change of gradient in the level of the land
- Multi-tierred or terraced garden
- There is erosion
- Needing better water drainage
Stonebloc is primarily a gravity- based retaining wall system. This type of retaining wall relies on the combined weight of concrete blocks to resist overturning forces. Simply, gravity retaining walls work by using their own weight and the weight of the soil they are holding back to provide stability.
Subdividing and maximising land with Stonebloc
Land subdivision is the process of dividing a piece of land into smaller sections or lots. These lots can then be sold, developed, or used for different purposes. Typically thought of as a residential process, subdividing land also benefits the wider community. Usually, this is done by creating public spaces and infrastructure. All land subdivisions must meet council requirements to meet safety and sustainability standards.
Stonebloc retaining walls offer a versatile solution for land subdivision. When subdividing with Stonebloc, you’ll benefit from:
- Generic Designs: Off-the-shelf retaining walls designs ranging from 5kPa to 12kPa and up to 2 meters high which meet building consents
- Maximised Land: Build retaining walls right up to the boundary line
- Fast Installation: 2 labour units can build up to 120m2 per day, allowing your subdivision to finish faster
For more specific designs, we can provide contacts for independent engineers experienced in designing with Stonebloc. By using Stonebloc for subdivision, property owners can divide their land in a way that meets council requirements while maximizing space. The modularity of Stonebloc makes it an ideal option for both greenfield developments and existing properties. With Stonebloc, land subdivision can be done efficiently and cost-effectively, while still meeting all necessary requirements for safety and sustainability.
Maximising the lifespan of your wall
Retaining wall structures is a long term structure. In New Zealand, the minimum design life of a retaining wall is 50 years, but in practice the wall will be around much longer then that. Retaining walls build using durable materials offer long term sustainability benefits, as the saying goes ‘build it once, build it right’.
Unlike traditional options (i.e timber retaining walls), Stonebloc doesn’t decay over time. This means that they are a low-maintenance and long-lasting option.
In contrast with other building systems, Stonebloc can be non-destructively dismantled during the life of the wall for easier maintenance, and at the end of life of the wall. The blocks can be reused. There is no effect on the structural integrity of the wall. This is almost unique to Stonebloc.
Divide your land and reduce environmental impact with Stonebloc
Stonebloc retaining walls divide land and reduce environmental impact. They are made of durable interlocking concrete blocks, which prevent soil erosion and runoff. These walls are visually appealing and require low maintenance, making them a practical choice for landscaping and property management. Stonebloc walls provide a reliable and eco-friendly solution for a variety of land management needs.
For retaining walls the help divide the land and reduce environmental impact, reach out to us:
https://www.envirocon.co.nz/pages/contact-us
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.
The largest target for this act is known as “Target for 2050”. This Act requires:
BY THE BEGINNING OF 1ST OF JANUARY 2030:
- Biogenic methane emissions are 10% less than 2017 emissions in a calendar year
BY THE BEGINNING OF 1ST OF JANUARY 2050:
- Net accounting emissions of greenhouse gases (apart from biogenic methane) are 0 in a calendar year
- Biogenic methane emissions are 24% to 47% less than 2017 emissions in a calendar year (and each subsequent year)
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.
- The timeframe for achievement
- The level of emission reductions required to achieve
- The greenhouse gases, emissions, and removals
- How the target is met
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.
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
- Municipal landfill: $30
- Construction and demolition fill: $20
- Managed or controlled fill facility: No levy
1 JULY 2023
- Municipal Landifill: $50
- Construction and demolition fill: $20
- Managed or controlled fill facility: $10 (New levy)
1 JULY 2024
- Municipal Landifill: $60
- Construction and demolition fill: $30
- Managed or controlled fill facility: $10
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:
- Plastic packaging
- Tyres
- Electrical and electronic products (e-waste including large batteries)
- Agrichemicals and their containers
- Refrigerants and other synthetic greenhouse gases
- Farm plastics.
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:
- Natural and Built Environment Act (NBE Act), the main replacement for the RMA, to protect and restore the environment while better-enabling development
- Spatial Planning Act (SPA), which requires the development of regional spatial strategies (RSSs) and implementation plans, to help coordinate and integrate long term-strategic decisions in each region
- Climate Adaptation Act (CAA), to address complex issues associated with managed retreat.
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.
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.
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.
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 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 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
- Weather Protection: Depending on whether you’re needing indoor or outdoor storage, Interbloc can help. Indoor solutions can be achieved with our bulk fertiliser storage solutions. For outdoor solutions, retractable roofing or hinged doors can be added to ensure ventilation is gained, without sacrificing the quality of the fertilizer.
- Light exposure: With concrete blocks at a minimum of 20 MPA and 600 mm thick, light is very hard to break through. Combine this with a retractable roof and hinged doors for a combination that reduces light exposure with great ventilation.
- Heat control: As you can implement quality ventilation for indoor and outdoor Interbloc solutions, you’ll also be able to maintain a level of heat control
- Maintaining granular size: Because of the modularity of Interbloc, you can adjust your fertiliser bin as you need without much hassle.
By choosing Interbloc for your fertiliser storage, you also gain more benefits including:
- Fast Installation: This is unique to Interbloc. The combination of the interlocking shear key and certified lifting pin means 2 labor units can install up to 160m2 of wall per day. The interlocking shear key allows the blocks to self-align and positive interlock, speeding up installation and increasing the strength of the system.
- Reinforcing options: To improve the capacity of the wall to take higher loads, you can add vertical reinforcing
- Non-destructive dismantling: The modularity of Interbloc means you can deconstruct a wall just as easily as you can build it.
- Buyback guarantee: If you no longer need your Interbloc concrete blocks, you can sell them back to us.
- EPD Backed: With its low carbon profile, Interbloc is independently verified with an EPD from think. This will give you the reassurance that using the concrete block system is sustainable for your projects.
Interbloc Fertilizer Bin Success Stories
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:
- The strength of the blocks can withstand the odd hit from the loaded
- The blocks are freestanding
- The bin could be installed with their forklift
- The ability to expand and or relocate the bin in the future
“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
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:
- The blocks were movable/ the solution could be temporary
- The Interbloc system is engineered
- The retaining and retention walls that formed the bulk fertilizer storage doubled the factor of safety in their stores
"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.
- Moss and other buildups on the facia of the wall
- Water leakage
- Graffiti
Here are some examples:
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:
- Getting the right backfill and drain coil for your project is vital. This ensures water/moisture can be effectively drained
- Take into account the type of soil or clay - this may affect the overall design and the maintenance approach after
- Surface water needs to be taken into account. If there are gutter downspits nearby that drain near your wall, divert it away (DIY Retaining Wall)
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.
The templates are available in two size
- Single
- Double
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:
- Remove graffiti is easily
- No ghosting or shadowing is leftover
- You eliminate the need to hire a professional graffiti removal service as you can do it yourself
- A lot of graffiti protection coatings are also high weather resistance. In many instances, this will protect your Stonebloc wall from UV and salt spray
- The effects of direct and pollution can also be reduced, allowing it to keep it looking the same as when it was first installed
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:
- The ability to apply with thin layers, for easy workability
- Be able to work on materials such as concrete, mortar, and masonry
- Strong, both mechanically and with substrate adhesion
- Good resistance to water & moisture
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:
- A shear key: This is unique to Interbloc. The interlocking shear key allows the blocks to self align and positive interlock, speeding up installation and increasing the strength of the system Interbloc blocks are always installed in a running bond pattern.
- Reinforcing ducts: To improve the capacity of the wall to take higher loads, you can add vertical reinforcing
- Certified lifting: For easy block movement and installation, at least one lifting pin is added to a 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:
- Posts: These are the vertical pieces of timber that are concreted into the ground.
- Rails: These are the horizontal pieces of timber that retain the soil or act as retention for product
- Concrete: This is used to install the posts and make sure they don’t shift
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
- Minimal foundations
- Fast Installation
- No pre-build inspection
- Extended durability
- Non-destructive dismantling
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 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 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.
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:
- EPD Backed: With its low carbon profile, Interbloc is independently verified with an EPD from think. This will give you the reassurance that using the concrete block system is sustainable for your projects.
- Non-destructive dismantling: The modularity of Interbloc (achieved through its interlocking shear key) means you can deconstruct a wall just as easily as you can build it. Accessing utilities is easily done, and does not cause waste unlike timber
- Buyback guarantee: If you no longer need your Interbloc concrete blocks, you can sell them back to us. That way, someone else can use them and they’re not adding to New Zealand’s waste problem.
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.
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:
- With some fast-growing timber, there is less strength compared to an old-grown tree. Although, this can be somewhat remedied with modification and treatment. This means replacement walls (in the instance of a timber fail) are needed sooner than with concrete structures.
- If you need to deconstruct a timber structure, there is going to be waste and damaged timber. Add to this, if you need to access utilities, you need to break down the whole wall creating waste
- Wood treatment with the aim to improve longevity can harm the environment
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
- It has become much more difficult to send waste overseas for recycling with recent restrictions on importing waste for recycling, and dramatic price falls for materials for recycling in international markets; this has particularly affected recycling of plastics, paper, and card
- There is limited infrastructure in New Zealand for recycling and reusing waste
- Many products are not designed to be reused or recycled
- It is often much cheaper and easier to dispose of materials to landfill than to reuse them
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).
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:
- Firstly, any refunds are paid to operations of levied facilities. This happens when a levy payment has been waived
- Next, half of the remaining money is allocated to territorial authorities e.g local councils) on a population basis. This revenue needs to be spent on achieving waste minimisation (or promoting it) as set out in their waste management and minimisation plans
- Next, all administration costs are paid. Administration activities include the cost of collecting the levy and distributing funds to territorial authorities or through the Waste Minimisation Fund
- Any remaining levy revenue is allocated to waste minimisation projects, generally through the WMF.
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:
- Increased on-shore processing and manufacturing capacity for materials like plastics, paper, and glass
- Greater investment in improving the quality of our recycling commodities(this includes enhancing systems for collecting and sorting materials)
- More extensive networks of resource recovery centers, including construction and demolition materials
Envirocon’s Interbloc range helps achieve waste minimization goals
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:
- The wet certified excess concrete is used to create Interbloc, diverting from landfill (and avoiding a waste stream)
- 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.
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.