Shed Slabs

What is a Shed Slab?

A shed slab is a concrete foundation designed specifically for garden sheds, tool sheds, workshops, and storage structures. Unlike house slabs or structural foundations, shed slabs are purpose-built for light to moderate load-bearing applications and provide a level, durable base for your shed.

A properly constructed shed slab prevents moisture ingress from the ground, protects against termites, and provides a stable platform for years of reliable storage. Whether you're planning to store garden tools, build a workshop, or create additional storage space, a quality concrete slab is essential for longevity and functionality.

Common Shed Slab Sizes

The ideal size for your shed slab depends on your intended use and available space. We provide slabs in a range of standard sizes to suit most shed requirements:

Slab Thickness Guide for Sheds

Concrete slab thickness is critical for structural integrity and longevity. The right thickness depends on the intended use and expected loads:

• 75mm thickness: Ideal for light storage sheds (garden tools, equipment) with no vehicle access. Provides adequate durability for minimal foot traffic and light loads.
• 100mm thickness: Recommended for workshops, tool sheds with occasional light vehicle access, or areas with heavier equipment storage. Offers superior strength and longevity.

Thicker slabs provide better protection against cracking, settlement, and load distribution, making 100mm our standard recommendation for most Queensland climates and soil conditions.

Reinforcement Options

Reinforcement strengthens concrete and prevents cracking:

• Wire mesh: Standard reinforcement for smaller slabs. Wire mesh (typically 6mm diameter at 150mm spacing) distributes loads evenly and controls surface cracking.
• Rebar (reinforcing bars): Recommended for larger slabs or areas with heavier loads. Rebar provides superior tensile strength and is ideal for workshop slabs or storage areas with heavy equipment.

The choice depends on slab size, load requirements, and soil conditions. We assess each site individually to recommend the most appropriate reinforcement.

Queensland-Specific Considerations

Queensland's climate and soil conditions require specialised slab construction:

• Soil types: Brisbane's variable soil composition (clay, silt, sandy soils) requires proper assessment. Poor soil bearing capacity may require additional preparation or thickened slabs.
• Drainage: Queensland's wet season demands excellent drainage around slabs. We ensure adequate fall (typically 1:100) and perimeter drainage to prevent water pooling and subsurface saturation.
• Termite barriers: Termites are common in Brisbane. We incorporate termite barriers as part of our standard slab preparation to protect your shed structure from infestation.
• Moisture control: Damp-proof membranes prevent moisture rising from the ground, protecting stored goods and preventing mould.

Our Shed Slab Preparation Process

A quality shed slab begins with meticulous preparation:

1. Site assessment: We inspect soil conditions, drainage patterns, and the intended use to determine slab specifications.
2. Excavation: The site is cleared and excavated to the required depth, typically 200-250mm below finished level.
3. Compaction: The subgrade is compacted in layers to achieve proper density and prevent settling.
4. Base preparation: A gravel or recycled rock base layer improves drainage and provides consistent support.
5. Formwork: Timber or metal forms are set to the correct height and line, ensuring a level and accurate finished slab.
6. Reinforcement placement: Wire mesh or rebar is positioned at the correct height within the slab.
7. Pour and finish: Concrete is poured, screeded to level, and finished to your specified texture (smooth, broom, or textured).
8. Curing: Concrete is properly cured to achieve maximum strength (typically 7-14 days depending on weather).

Common Shed Slab Use Cases

Our shed slabs serve a variety of purposes across Brisbane:

• Garden sheds: Secure storage for garden tools, equipment, and seasonal items.
• Tool sheds: Dedicated workshops for DIY enthusiasts and tradies.
• Storage sheds: Additional space for household items, furniture, and equipment.
• Workshops: Bases for small-scale manufacturing, fabrication, or hobby workshops.
• Hobby spaces: Foundations for creative spaces, studios, or craft workshops.