Understanding Pool Concreting
Pool concreting refers to the process of building a swimming pool using reinforced concrete, typically shotcrete or gunite, applied over a steel framework. Unlike prefabricated fibreglass or vinyl pools, concrete pools are cast on-site, allowing for unlimited shapes, sizes, and finishes.
Concrete pool construction has long been considered the premium choice for homeowners who value design freedom, structural durability, and a long lifespan. While the process takes longer and involves more technical steps, the end result is a completely bespoke, durable, and luxurious addition to your home.
In Brisbane and across Australia, leading builders such as Environ Pools specialise in creating architecturally designed concrete pools and spa combinations, demonstrating how advanced concreting techniques can transform a backyard into a resort-style retreat.
The Phases of Concrete Pool Construction
Building a concrete pool involves multiple, carefully sequenced stages. Each phase must be completed with precision to ensure a strong, watertight structure that lasts for decades.
Design and Engineering
The process begins with design and planning. This stage involves site surveys, soil testing, and engineering design to determine the pool’s shape, depth, and structural requirements. Builders assess access points, drainage, and any slope issues before excavation begins.
Excavation and Site Preparation
Excavation shapes the cavity where the pool shell will sit. Soil stability and drainage are key concerns at this stage. In Brisbane, clay and reactive soils require careful handling to prevent future cracking.
Steel Reinforcement, Plumbing, and Electrical Setup
Once the hole is ready, steel reinforcement is installed to form a cage-like structure that gives the pool its strength. Plumbing lines for filtration, jets, and skimmers are fitted at the same time. Conduits for lighting and electrical systems are also laid before concrete is sprayed.
Spraying the Concrete: Shotcrete or Gunite
The defining step of pool concreting is the spraying process. Builders use either shotcrete (wet mix) or gunite (dry mix) to form the shell. The concrete is pneumatically applied under pressure to the steel reinforcement, then shaped and smoothed by hand.
This method creates dense, high-strength concrete that can be sculpted to complex forms, perfect for custom pools with curves, benches, or integrated spas.
Curing and Waterproofing
After spraying, the concrete shell must cure properly to reach full strength. This typically takes 4 weeks for optimal strength.. During this time, the surface must remain moist to prevent cracking.
Poor curing or inadequate waterproofing is a common cause of long-term issues, so following best practices is essential.
Finishing, Tiling, and Coping
Once the structure is cured, the pool interior is finished using materials such as pebblecrete, glass mosaic tiles, or quartz plaster. Waterline tiles, coping stones, and decking are added for aesthetics and function.
Equipment Installation and Handover
The final phase includes installing pumps, filters, heaters, lighting, and control systems. Once the pool is filled, the builder conducts inspections, water testing, and a handover walkthrough, to show you how to operate and maintain your new system.
Concrete Pool Construction Methods and Materials
Shotcrete vs. Gunite
Both shotcrete and gunite involve spraying concrete through a hose under high pressure, but the difference lies in how water is mixed in. Shotcrete combines water and cement before spraying, while gunite mixes dry materials that combine with water at the nozzle. Both methods produce a strong, dense shell when applied correctly.
Learn more about the technical aspects on Wikipedia’s Shotcrete page.
Reinforcement and Shell Thickness
Concrete pool shells are usually 150–200 mm thick, reinforced with steel rebar or mesh. Structural engineering determines how thick the shell should be, depending on soil type, hydrostatic pressure, and pool design.
Finishing Materials
Interior finishes vary in texture and cost. Options include smooth plaster, pebblecrete, quartz render, or glass mosaic tiles. Each affects water colour, feel, and maintenance. For a premium look, tiled interiors remain popular across high-end Brisbane builds by companies like Environ Pools.
Timeframes, Costs, and Trade-Offs
How Long Does Pool Concreting Take?
Concrete pool construction is a slower process than fibreglass installation, often taking 8–12 weeks or longer depending on complexity and weather. Each stage, excavation, reinforcement, concreting, curing, and finishing, must be completed before the next begins.
Visit our latest project for a detailed outline of the complete pool installation process
A small to medium concrete pool in Australia generally costs between $50,000 and $70,000, while larger or more intricate designs can exceed $100,000. Costs vary based on size, finish, site access, and additional features such as spas or heating systems.
Advantages of Concrete Pools
- Complete Customisation: Choose any shape, size, or depth.
- Structural Strength: Reinforced shells last decades.
- Longevity: Surfaces can be resurfaced or retiled over time.
- Luxury Finishes: Pebblecrete, tiles, and unique features create a high-end look.
Challenges and Considerations
- Higher Upfront Cost: Concrete pools are a premium investment.
- Longer Build Time: Multiple curing stages and weather dependencies.
- Maintenance: Surfaces may need resurfacing or retiling after 15–20 years.
- Technical Risk: Requires experienced builders to prevent leaks or cracking.
Best Practices for a Successful Pool Concreting Project
- Hire experienced, licensed pool builders with proven concrete expertise.
- Ensure proper structural engineering is completed before excavation.
- Monitor site drainage and soil conditions to avoid movement and cracking.
- Follow strict curing protocols to maintain concrete strength.
- Invest in quality waterproofing to prevent future leaks.
- Choose the right interior finish for durability and ease of maintenance.
- Plan for long-term maintenance such as resealing or resurfacing.
Final Thoughts
Pool concreting is a complex, technical, yet deeply rewarding process. When executed correctly, it delivers unmatched design flexibility, durability, and aesthetic appeal. While concrete pools require higher upfront investment and longer build times, they provide exceptional long-term value, especially for homeowners who want a completely customised outdoor oasis.
Whether you’re adding a sleek lap pool, an infinity edge design, or an integrated spa, concrete construction remains the gold standard for bespoke, high-performance swimming pools in Australia. For your Brisbane pool, get in touch with Environ Pools today
