Concrete Slabs & Foundations Brisbane — Residential & Commercial
A quality concrete slab is the foundation of every great build. At Concrete Concepts Group, we pour residential and commercial slabs across Brisbane and South East Queensland — from house pads and shed floors to garage slabs and commercial foundations. Every slab is engineered, reinforced, and finished to Australian standards, giving you a rock-solid base that will last for decades.
The concrete slab is arguably the most important element of any building project. It's the foundation that everything else sits on, and getting it wrong can lead to costly structural problems down the track. At Concrete Concepts Group, we take slab work seriously — every slab we pour is designed to meet or exceed Australian Standard AS 2870 (Residential Slabs and Footings), with proper engineering, reinforcement, and quality control throughout the process.
Brisbane's reactive clay soils present particular challenges for slab construction. Many suburbs — especially in the western corridor (Springfield, Forest Lake, Ipswich) and southern suburbs (Logan, Beenleigh) — have highly reactive soils that expand and contract with moisture changes. This movement can crack poorly designed slabs and damage the structures above them. Our slabs are engineered specifically for your site's soil classification (from Class A to Class H2), with appropriate beam depths, reinforcement, and moisture management.
We pour several types of slabs depending on the application. Raft slabs (also called waffle pod slabs) are the most common for residential construction — they use polystyrene void formers to create a stiffened raft that sits on the ground surface. Strip footings with suspended slabs are used on sloping sites or where greater ground clearance is needed. Post-tensioned slabs use steel cables tensioned after pouring to create extremely strong, thin slabs ideal for commercial applications.
For shed slabs and garage floors, the requirements are different from house slabs. A typical shed slab is 100mm thick with SL72 mesh reinforcement and 20MPa concrete — sufficient for storage and light workshop use. If you're parking heavy vehicles or installing a hoist, we upgrade to 150mm thickness, SL82 mesh, and 32MPa concrete. Every shed slab we pour includes proper edge beams, a vapour barrier, and control joints to prevent cracking.
Why Choose Concrete Concepts for Concrete Slabs Brisbane
Our Process
Engineering & Planning
We work with structural engineers to design your slab based on soil classification, building loads, and site conditions. You receive engineering drawings and a detailed quote before any work begins.
Excavation & Preparation
The site is excavated to engineering specifications, levelled, and compacted. Vapour barrier is installed, followed by formwork, edge beams, and steel reinforcement mesh positioned on bar chairs at the correct height.
Concrete Pour
Concrete is poured using a pump or direct pour (depending on access), vibrated to remove air pockets, screeded to level, and finished to a smooth surface. We coordinate timing with concrete suppliers to ensure continuous pours.
Curing & Inspection
Curing compound is applied immediately after finishing. Control joints are cut within 24 hours. The slab is inspected against engineering specifications, and you receive Form 15 certification for building approval.
Concrete Slabs Brisbane Pricing
Concrete slab costs depend on size, thickness, reinforcement, soil conditions, and engineering requirements. Here are current Brisbane rates:
| Type | Price Range | Estimate | Notes |
|---|---|---|---|
| Shed Slab (100mm) | $75 – $100/m² | $3,750 – $5,000 | Standard shed/garage floor |
| Shed Slab (150mm heavy-duty) | $95 – $130/m² | $4,750 – $6,500 | Workshop, heavy vehicles |
| House Slab (raft/waffle pod) | $100 – $160/m² | N/A | Engineered, Class A-H2 soils |
| Commercial Slab | $120 – $200/m² | N/A | Heavy-duty, post-tensioned options |
All prices include GST, concrete supply, reinforcement, formwork, finishing, and curing. Engineering fees ($2,000-$5,000 for house slabs) are additional. Excavation and site preparation quoted based on conditions.
Frequently Asked Questions
How much does a concrete slab cost in Brisbane?
Concrete slab costs depend on type and size. Shed slabs start from $75/m² (100mm thick), heavy-duty slabs from $95/m², and house slabs from $100/m². A 50m² shed slab typically costs $3,750-$5,000, while a 100m² house slab ranges from $10,000-$16,000 plus engineering. We provide free, detailed quotes.
How thick should a concrete slab be?
Standard shed/garage slabs are 100mm thick. Heavy-duty slabs (workshops, heavy vehicles) should be 150mm. House slabs are designed by engineers based on soil classification — typically 100-150mm with deeper edge beams (300-600mm). Your engineer specifies the correct thickness for your project.
How long does a concrete slab take to cure?
Concrete reaches approximately 70% strength at 7 days and full design strength at 28 days. Light foot traffic is safe after 24-48 hours. Building work can typically begin after 7 days. The slab should not be loaded with heavy materials or equipment for at least 14 days.
Do I need engineering for a shed slab?
Simple shed slabs under 10m x 10m on stable soil generally don't require engineering. However, if your site has reactive soils, a slope, or the shed will be used as a workshop with heavy equipment, engineering is recommended. House slabs always require engineering. We'll advise during our site inspection.
What is a waffle pod slab?
A waffle pod (or raft) slab uses polystyrene void formers arranged in a grid pattern, with reinforced concrete beams between them. This creates a stiffened raft that distributes loads evenly and resists soil movement. It's the most common house slab type in Brisbane and is suitable for most soil classifications.
Can you pour a slab on a sloping site?
Yes! Sloping sites may require a suspended slab on strip footings, a cut-and-fill approach, or a split-level design. These are more complex and costly than flat-site slabs, but we have extensive experience with Brisbane's hilly terrain. Engineering design is essential for sloping sites.
Need a slab quote? Call us for a free site inspection.
QBCC Licensed #15299707 · Fully Insured · Free On-Site Quotes · Serving All of Brisbane & SEQ
Concrete Slabs Brisbane — Areas We Service
We provide concrete slabs brisbane services across Brisbane and South East Queensland, including: