Slabs, Site Prep & Installation

For permitted sheds, yes - a concrete slab is mandatory. SteelChief does not have supporting engineering for permitted sheds installed on timber floors, pier-only bases, compacted gravel, or any other alternative base. This is a hard limit, no workarounds.

For sheds that do not need a permit, a concrete slab is still strongly recommended - the N3 wind rating requires a slab.

If concrete is not workable for your site (a steep slope, rocky ground, or somewhere a slab pour is not practical), a raised timber sub-floor on treated pine bearers is available - but it is not an option for any shed that requires a building permit.

For non-permit sheds, a raised timber sub-floor on treated pine bearers is available - useful on sloped, rocky or hard-to-level sites where concrete is not practical. The shed sits on a level timber sub-floor, not directly on the ground.

For permit sheds, no - only a concrete slab. We do not have supporting engineering for any other base option on permitted sheds.

Pavers can be a great option for smaller sheds in protected areas. Talk to your sales specialist for design and prep ideas.

Yes - slab service is available in most of our service areas. We can prepare the site, set the formwork, pour the slab to your shed dimensions, and let it cure for around 1 to 2 weeks before installation. The standard slab thickness for permitted sheds is 100mm.

Slab pricing is quoted per job - it depends on shed size, site access, ground conditions, and any prep work needed. We quote it as a separate line item so you can compare against arranging your own concreter locally.

If you are using your own concreter (common in Victoria for owner-builder arrangements), the slab still has to match the shed footprint and be engineered to support a permitted shed - talk to us about the spec before pouring.

When getting quotes from trades, make sure you don't get caught out with dodgy work. Check that the slab is a minimum 100mm thick with a minimum SL62 reinforcing mesh. Discuss level and water runoff with your contractor before you commit to the job. Compare apples with apples, you don't want to end up with a lemon.

SteelChief sheds attach to the slab through BaseSmart®, our L-shaped flashing along the bottom edge of the steel wall panels. BaseSmart is a standard inclusion on all vertical-clad steel sheds (heavy duty and steel frame) at no extra cost.

The anchoring works like this:

1. Concrete fixing brackets (CFKs) attach to the BaseSmart flashing on the shed.
2. The CFKs are fixed to the slab using screw bolts.
3. The load path runs from the wall panel to the CFK to the slab.

BaseSmart also solves a long-standing shed problem: most other shed manufacturers use a U-shaped base channel, which traps leaves, dirt, lawn clippings and water against the steel. That trapped moisture is the leading cause of premature rust at the base of a shed. The L-shape lets debris and water fall away from the wall rather than sitting against it.

BaseSmart is fitted to vertical-clad steel sheds only. Horizontal corrugated (Horri Corri) and timber sheds use different base details.

Yes - DIY installation is available on all of our range. Every SteelChief shed ships as pre-assembled wall and roof panels rather than a flat-pack box of individual parts, which makes the install significantly faster than building a kit from scratch.

For DIY:

• The customer arranges site preparation, slab pour (or raised timber sub-floor for non-permit sheds), and anchoring.
• We deliver or you pick up the panels.
• You assemble them on site.

For DIY non-permit sheds in wind-protected positions, anchor packs with star pickets and self-drilling screws through BaseSmart are available. This option is not N3-rated and is not suitable for any shed that requires a building permit - permitted sheds must be on a slab with proper anchoring.

For larger sheds, anything requiring a permit, builds in exposed locations, or anyone who would prefer the work handled, we offer full delivery and installation including site preparation, slab pour, and anchoring.