Factors Affecting the Cost of Exposed Aggregate Concrete Per Square Metre

The cost of installing exposed aggregate standard concrete in Melbourne can vary widely based on several factors. Here’s a closer look at what influences the overall cost:

1. Material Costs

Material costs are a significant factor in determining the final price of your concreting project. These costs can vary depending on several aspects:

• Types of Aggregates: The type of concrete aggregates you choose, such as pebbles, stones, and other decorative elements, can impact the price. More exotic or rare aggregates will be more expensive..
• Concrete Mix: The specific mix used for the concrete can also affect the cost. High-quality mixes designed for durability and aesthetic appeal cost more.
• Colour Options: Coloured concrete costs more than plain concrete due to the additional materials and processes required to achieve the desired hue.
• Concrete Supplier: The supplier dictates the price of the mix. Depending on demand the concrete supplier will adjust the price.

2. Labour Costs

Labour costs are another crucial component of the overall cost. Several factors influence these costs:

• Professional Installation: Hiring experienced Concrete Contractors ensures quality work but comes at a higher price. Professional installation is essential for a durable and visually appealing finish.
• Complexity of the Project: The complexity and size of the project will significantly impact labour costs. More intricate designs and larger areas require more time and expertise, increasing the cost per m2.  
• Type of Finish: Different types of exposed aggregate finishes, such as polished or matte, can also affect the labour costs due to varying levels of effort, skill and time required to complete the job. 
  

3. Preparation Work

Proper preparation is key to a successful exposed aggregate concrete project. This involves several steps that contribute to the overall cost:

• Site Preparation: This includes clearing the area, removing any existing materials, and levelling the ground. The more extensive the preparation work, the higher the cost.
• Setting Up Forms: Forms are essential to shape the concrete. Complex shapes or designs can increase the cost due to the additional time and materials required.
• Surface Retarder Application: A surface retarder is applied to prevent the top layer of concrete from setting too quickly. This process allows the aggregates to be exposed and can add to the preparation costs.
  

4. Concrete Grade

The grade of concrete refers to its strength and durability, typically measured in megapascals (MPa). Choosing a higher-grade concrete can increase the cost but provides greater strength and longevity.

• Normal Class Concrete (20-25 MPa): Suitable for most residential projects, this grade is typically used for standard driveways, pathways, and patios.
• High-Strength Concrete (32 MPa and above): Used in heavy traffic areas and commercial applications, this type of concrete offers enhanced durability and resistance to wear and tear.
• Reinforced Concrete: This includes steel reinforcements to provide additional strength and is often used for structural elements like retaining walls and large slabs.

5. Additional Factors

Other factors can also influence the cost of exposed concrete:

• High-Traffic Areas: If the concrete is being used in high-traffic areas like driveways or commercial spaces, it may require a stronger mix or additional reinforcement, increasing the cost.
• Choice of Aggregates: The cost can vary based on the specific choice of aggregates. More decorative or coloured aggregates tend to be pricier.
• Retaining Walls and Additional Structures: If your project includes retaining walls or other structures, this will add to the overall cost. Retaining walls often require reinforced concrete, which is more expensive.
• Size and Scope of the Project: Larger projects naturally cost more due to the increased amount of materials and labour required.
  

How Much Does Exposed Aggregate Driveway Cost in Melbourne per M2?

The total cost for your concreting project will depend on the size of the area, the type of aggregates used, and the complexity of the design. For a standard driveway, you're expecting to pay between $90 to $150 per square meter, while a pool deck will cost from $100 to $180 per square meter.

Understanding the average costs can help you budget for your project. Here’s a cost guide breakdown for different concreting projects:

Driveways

• Average Cost: $90 to $150 per square meter.
• Factors: Size of the driveway, type of aggregates, and design complexity.
  
  

Pool Decks

• Average Cost: $100 to $180 per square meter
• Factors: Size of the pool, chosen aggregate, and additional features like borders or patterns.
  
  

House Slabs and Floors

• Average Cost: $90 to $160 per square meter.
• Includes: Site preparation, concrete pouring, and finishing.
  
  

Retaining Walls

• Average Cost: $150 to $300 per square meter.
• Factors: Wall height, length, and aggregate type.
  

Long-Term Maintenance and Costs

One of the major benefits of exposed aggregate concrete is its low-maintenance nature. Proper care can extend the lifespan of your concrete surface, keeping it looking great and functioning well for years to come. Here are some maintenance tips:

1. Regular Cleaning

• Sweep Away Debris: Regularly sweep away leaves, dirt, and other debris.
• Wash with Water: Periodically wash the surface with water to prevent dirt buildup.
  
  

2. Sealing

• Apply a Sealer: Sealing the surface helps protect it from stains, weathering, and heavy traffic.
• Enhance Durability: A sealer can also enhance the durability and appearance of the concrete.
  
  

3. Repairs

• Address Cracks Promptly: Fix minor cracks or damage quickly to prevent further deterioration.
• Prevent Costly Fixes: Prompt repairs can save you from more extensive and expensive repairs in the future.

Looking for concreting experts for your next project?

Exposed aggregate concrete is a fantastic option for enhancing the beauty and functionality of your home in Melbourne.

While the costs can vary based on several factors, understanding these key elements will help you plan your budget effectively.

Whether you’re looking to install a new driveway, pool deck, or pathway, exposed aggregate offers a unique and durable solution.