A shed is only as strong as the concrete slab beneath it. Whether your shed will store tools, vehicles, machinery or household items, the slab must be built correctly to withstand weight, weather and long-term use.
Here’s everything a Queensland homeowner needs to know:
Correct Thickness for Shed Slabs
Standard Residential Sheds:
– 100 mm thickness
– SL72 mesh reinforcement
Heavy-Duty Sheds:
– 120–150 mm thickness
– SL82 mesh or N12 bar reinforcement
Commercial or Industrial Sheds:
– May require engineered slab design
– Thickened edges or extra reinforcement
Ground Preparation
A strong slab begins with correct site preparation:
1. Mark-out and measurements
2. Excavation to correct depth
3. Compaction of road base or crusher dust
4. Laser levelling for accuracy
5. Formwork installation to shape the slab
Moisture Barrier
A 200 μm plastic moisture barrier prevents:
– Moisture rising through concrete
– Rust on stored tools or machinery
– Dampness and mould issues
Reinforcement
Every quality shed slab includes reinforcement:
– SL72 or SL82 mesh
– Mesh chairs to lift steel into the correct position
– Extra steel around roller doors or high-load areas
Drainage & Fall
Proper drainage protects the shed long-term.
Our concreters ensure:
– Water flows away from the structure
– No pooling around shed edges
– Correct slab height relative to ground
– A surface finish suited to how you’ll use the shed
Anchor Bolt Placement
Accurate bolt placement is essential for:
– Durability
– Shed alignment
– Structural integrity
Quality Matters
A well-built shed slab provides:
✔ Stability
✔ Protection against moisture
✔ Even installation surface
✔ Long-lasting performance
Why Choose Us As Your Concrete Contractors:
✔ Experienced with all shed slab types
✔ Accurate levelling & clean finishing
✔ Strong reinforcement for QLD conditions
✔ Servicing Logan, Brisbane, Ipswich & Gold Coast
For shed slabs built to last in Queensland’s conditions, our professional concreters in Logan can help with expert advice and quality workmanship.
Book Your Free Measure & Assessment
Contact our team to build a shed slab that lasts.
