Introduction
Whether it’s for mining tunnels, retaining walls, or structural rehabilitation, shotcrete has become the go-to solution for fast, durable, and versatile concrete application. But for anyone planning a project, two questions inevitably come up: “Who should I hire?” and “What will it cost per square metre?”
In this post, we’ll walk you through what makes a great shotcrete contractor, the key skills and qualifications to look for, and how pricing per m² is typically calculated. We’ll also look at why working with experienced specialists—like the team at Altcrete—is a smart investment in both quality and safety. By the end, you’ll have a clear understanding of the process, the costs, and the critical factors that make a shotcrete project successful.
1. What Makes Shotcrete Different From Traditional Concrete
Shotcrete, also known as sprayed concrete, is applied pneumatically through a hose at high velocity. Unlike traditional poured concrete, it doesn’t require formwork for most applications. This means it can be sprayed directly onto surfaces, even those with complex curves, overhead angles, or irregular shapes.
For mining and tunnel environments, this speed and adaptability are game-changing. With minimal setup, a shotcrete crew can stabilise ground conditions quickly, reducing the risk of rock falls or delays. For above-ground works like retaining walls or pool shells, the same principles apply—fast coverage, strong adhesion, and long-lasting results.
2. The Role of a Shotcrete Contractor
A shotcrete contractor is not just someone with the right equipment—they’re specialists who understand the entire process from site preparation to finishing. Their responsibilities typically include:
- Assessing the site to determine surface preparation needs.
- Selecting the right mix based on structural requirements, environmental conditions, and desired finish.
- Coordinating logistics so the shotcrete arrives on site and is applied before it loses workability.
- Operating specialised equipment with trained nozzle operators.
- Ensuring quality control by monitoring rebound, layer thickness, and curing.
Contractors like Altcrete bring years of field experience, enabling them to anticipate challenges and apply solutions before problems arise. This is particularly important in mining and industrial environments, where access constraints and safety regulations are strict.
3. Why Experience Matters in Shotcrete Application
The quality of a shotcrete job is determined by a mix of science, skill, and timing. Even with the best materials, inexperienced operators can cause issues like uneven layers, excessive rebound (material that bounces off the surface), or weak bonding.
Experienced contractors understand:
- The correct nozzle angle for optimal compaction.
- How to layer shotcrete without creating cold joints.
- Adjustments for temperature, humidity, and wind.
- Safety protocols for confined spaces and high-risk areas.
This is why reputable companies invest heavily in training and certification. When you choose an established contractor, you’re not just paying for the material—you’re paying for the expertise that ensures long-term performance.
4. How Shotcrete Pricing is Calculated (Per m²)
One of the most common questions clients ask is, “What’s the price per m²?” The answer isn’t always a flat number, because several variables influence cost. According to Altcrete’s Minecrete product sheet, shotcrete projects are priced by considering:
- Thickness of Application – A 50 mm layer costs less than a 150 mm structural layer.
- Type of Mix – High-performance mixes with accelerators or fibres have higher material costs.
- Surface Condition – Smooth, clean surfaces need less prep than rough, fractured rock.
- Accessibility – Tight spaces or deep underground work require more labour and setup time.
- Project Scale – Larger jobs often benefit from economies of scale, reducing per-m² rates.
- Equipment & Crew – Specialised gear like robotic sprayers can change labour costs.
While each project is unique, Altcrete’s approach ensures you get a tailored quote that reflects actual site conditions rather than a generic per-m² figure.
5. Example: Mining Tunnel vs. Surface Retaining Wall
To illustrate how pricing might vary, let’s compare two scenarios:
- Mining Tunnel
Requires underground access, ventilation, and potentially wet-mix shotcrete for rapid coverage. Labour costs are higher due to confined space safety measures. Mix designs may include accelerators to speed up setting times for immediate ground support. - Surface Retaining Wall
Easier access, fewer ventilation needs, and potentially less reinforcement required. The crew can work more efficiently, lowering per-m² costs.
Even though both projects use shotcrete, the logistical differences can result in very different cost structures.
6. Why Altcrete is a Trusted Choice for Shotcrete Projects
Choosing the right contractor isn’t just about price—it’s about value. Altcrete has built a reputation on delivering durable, high-quality shotcrete solutions across mining, civil, and industrial projects.
Their strengths include:
- Proven Track Record – Years of successful applications in challenging environments.
- Specialised Mix Designs – Products like Minecrete, engineered for superior adhesion, reduced rebound, and long-term durability.
- Comprehensive Service – From surface preparation to final inspection.
- Safety & Compliance – Meeting or exceeding industry safety standards.
This combination of technical know-how, quality control, and safety awareness ensures that every project meets performance expectations while staying on schedule.
7. Getting the Most from Your Shotcrete Investment
To maximise the value of your project:
- Engage your contractor early so they can advise on design considerations.
- Be clear about performance goals—whether it’s structural support, waterproofing, or both.
- Allow adequate curing time before applying finishes or subjecting the shotcrete to load.
- Request samples or trial panels for large projects to confirm quality and finish.
These steps, combined with the expertise of an experienced contractor, can save time, reduce costs, and ensure long-lasting results.
Conclusion
Shotcrete offers unmatched flexibility and strength for mining, civil, and industrial applications. But achieving the best results requires two things: a skilled shotcrete contractor and a clear understanding of pricing factors per m².
By partnering with experienced providers like Altcrete, you get more than just concrete sprayed on a surface—you get engineered solutions that are safe, durable, and cost-effective. Whether you’re reinforcing a mining tunnel or building a retaining wall, investing in quality application pays dividends for years to come.
Frequently Asked Questions (FAQs)
1. How do I choose the right shotcrete contractor?
Look for proven experience, specialised training, quality control processes, and a track record of successful projects in environments similar to yours.
2. Is shotcrete more expensive than traditional concrete?
Per m², shotcrete can cost more due to equipment and labour, but it often saves time and reduces formwork costs—making the overall project more economical.
3. What factors affect shotcrete price per m²?
Application thickness, mix type, surface preparation, site accessibility, project size, and equipment choice all play a role.
4. Can shotcrete be used for decorative finishes?
Yes, skilled contractors can achieve smooth or textured finishes, making shotcrete suitable for both structural and aesthetic applications.
5. How quickly can shotcrete be applied?
With the right equipment and crew, large areas can be covered in a single day, making it one of the fastest concrete application methods.
6. Where can I learn more about Altcrete’s shotcrete solutions?
Visit Altcrete for detailed service information and the Minecrete Product Sheet for technical specifications.
