How Thick Does a Garden Shed Slab Need to Be?
For a standard garden shed, a 75–100mm slab is typically sufficient. If the shed will house a vehicle, heavy machinery or a workshop, we recommend 100–125mm with appropriate reinforcement. We assess the situation during the free quote and recommend the right thickness for your specific use case.
Does the Slab Need Reinforcement?
For a basic garden shed slab, reinforcement mesh (F62 or F72) is commonly used. For heavier loads or slabs in poorly draining soils, additional reinforcement or a thicker slab may be required. We'll advise on the appropriate specification for your project.
How Long After Pouring Can I Put the Shed Up?
Concrete reaches walking strength within 24–48 hours, but we recommend waiting at least 7 days — and ideally 28 days — before erecting the shed and putting full loads on the slab. We provide specific guidance for your project based on the mix used and the weather conditions.
Do I Need to Excavate for a Shed Slab?
In most cases, yes — the area needs to be excavated to the correct depth, and the subgrade needs to be compacted and prepared before pouring. The amount of excavation depends on the existing ground level, slope and soil conditions. We handle all of this as part of the job.
Can You Pour a Slab on a Sloped Block?
Absolutely. We can form up and pour a level slab on most sloped blocks. On steeper sites, this may require more formwork or fill, which affects the cost. We'll discuss all options during the free measure and quote.
What Does a Shed Slab Cost?
Costs vary depending on size, site conditions and access. We provide a free, no-obligation measure and quote — call 0411 089 227 or contact us online and we'll come out to assess the job.
Ready to Get Started?
Call us for a free measure and quote across North Brisbane, Moreton Bay and the Sunshine Coast.