What to Know Before Pouring a Concrete Slab in Brisbane
Pouring a concrete slab might seem straightforward, but there's more to it than just mixing and pouring. Whether you're building a patio, shed, or house extension, planning your concrete slab correctly from the start is key to ensuring durability, compliance, and a smooth finish.
If you're in Brisbane and planning a concrete slab project, here’s what you need to know before you get started.
Understand the Purpose of the Concrete Slab
First, get clear on what your slab will support. A simple garden shed won’t require the same specifications as a garage or a home extension. The slab’s intended use will determine the thickness, reinforcement, and concrete mix needed.
For example, a standard 100mm slab might be suitable for non-structural use like a shed base, while anything load-bearing—like a garage or structural addition—may need a slab 150mm thick or more. Heavier structures also call for stronger reinforcement, such as steel mesh or rebar, and a higher strength concrete mix.
This planning stage helps your contractor choose the right method, materials, and equipment to deliver the best results.
Check Local Regulations and Permits
Some concrete slab projects require approval from your local council—especially if the slab is large or part of a structural build.
In Brisbane, it's important to:
Confirm whether you need development or building approval
Check setback requirements from fences and boundaries
Ensure the slab won’t interfere with drainage or stormwater systems
Working with experienced professionals who understand Brisbane City Council regulations can help you avoid costly delays and ensure your project meets all legal requirements.
Consider Site Conditions and Soil Type
Your site’s condition plays a big role in how your concrete slab will be prepared and poured. Sloping land, poor drainage, or soft soil will often require excavation, soil stabilisation, or the installation of formwork and drainage systems.
Failing to address site issues can lead to cracking, movement, or water pooling under the slab later on. A well-prepared base ensures the slab stays strong and stable over time.
Plan for Drainage and Expansion
Brisbane’s weather can bring heavy rain, so drainage is a key part of slab design. A slight slope in the slab helps water run off and away from buildings, protecting your home or structure from future water damage.
Expansion joints are also necessary in most slabs. These allow the concrete to expand and contract with temperature changes, reducing the risk of cracking.
A good contractor will assess run-off and ensure the surrounding areas aren’t affected by changes in drainage flow once the slab is installed.
Choose the Right Team for the Job
Concrete slab installation is not a weekend DIY job—it takes skill, equipment, and experience. The right team can make a big difference in both the process and the outcome.
Professional concrete contractors will:
Advise you on necessary approvals and permits
Prepare your site thoroughly
Use the right mix and reinforcements for your needs
Deliver a smooth, durable finish built to last
Need a Slab Poured? Scavate & Crete Are Your Local Experts
At Scavate & Crete, we offer full-service concrete solutions—from excavation and site prep to pouring and finishing your concrete slab. Our team has extensive experience across Brisbane and knows exactly how to handle local conditions, compliance, and quality assurance.
Get in touch today to book a site assessment or request a quote. We’re here to help you build a strong foundation with expert workmanship and friendly service every step of the way.
