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St Kilda’s bayside blocks and older infill sites can mean variable fill, tight boundaries and higher moisture exposure—so getting the slab base right before the pour is critical.
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Our comprehensive service includes everything you need to make an informed decision about your property.
We check the slab area for suitable preparation, including removal of soft spots, evidence of uncontrolled fill and whether the base looks consistent and properly trimmed. This matters because uneven or poorly prepared bases can contribute to slab movement, cracking and level issues later.
We review formwork alignment, beam widths and critical set-out points that affect room sizes, boundary clearances and finished floor levels. In St Kilda’s tighter sites, small set-out errors can create big problems with fences, driveways and adjoining structures.
We assess mesh and bar positioning, overlaps (laps), tie-downs and whether reinforcement is adequately supported on bar chairs to achieve correct cover. If steel sits too low, too high or shifts during the pour, the slab may not perform as designed.
We check the membrane condition, laps and taping, penetrations, and whether it is laid to minimise tears and gaps. This is essential in a bayside suburb like St Kilda, where moisture control under slabs helps reduce the risk of dampness migrating into floor finishes and walls.
We confirm plumbing and electrical penetrations are in the correct locations, appropriately sleeved and positioned to avoid cutting reinforcement. Fixing incorrect penetrations after the pour often means core drilling and patching, which can be expensive and disruptive.
Where a termite management system is part of the build, we look for correct placement and continuity at vulnerable points such as penetrations and perimeter junctions. Getting this right before the pour helps avoid gaps that can compromise the intended protection.
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Get Stage 1 – Pre-Slab (Base Stage) Inspection as part of a comprehensive inspection package
Find answers to the most frequently asked questions about our inspection service.
Book it after the site is prepared and the formwork, reinforcement and vapour barrier are installed, but before concrete is poured. In St Kilda, where access can be tight and pours are often scheduled early, it’s best to line up the inspection as soon as you get the pour date. That way there’s time to fix any issues without delaying the concrete truck.
Yes. The pre-slab stage is the best time to confirm the membrane is continuous, correctly lapped and sealed, and not damaged by foot traffic or steel placement. We also look at how the slab area is prepared for moisture management, including practical detailing around edges and penetrations. These checks matter in St Kilda, where moisture control can impact finishes long after handover.
Common issues include reinforcement not properly supported on chairs, insufficient lap lengths, steel too close to formwork, torn or poorly sealed vapour barriers, and penetrations placed in the wrong spot or without adequate sleeves. We also see formwork alignment problems that affect slab dimensions. Finding these before the pour gives your builder a clear chance to correct them without major rework.
It can. Redeveloped blocks may have variable fill, remnants of previous footings, or service run complexities that influence slab preparation and penetrations. We pay close attention to the visible consistency of the base, set-out accuracy and detailing at boundaries where space is limited. While we’re not doing geotechnical testing, we can flag warning signs that should be addressed before concrete goes down.
You’ll receive a detailed report with photos, clear descriptions of what was observed, and actionable recommendations to take back to your builder or site supervisor. The report focuses on items that must be correct before the pour—formwork, steel, membrane and penetrations—so it’s easy to prioritise rectifications. If you need clarification, you can call us to talk through the findings.
Still have questions?
Get in TouchCall ACE Building and Pest Inspections on 0485 857 077 for a Stage 1 – Pre-Slab (Base Stage) Inspection in St Kilda, with photo-backed findings you can act on straight away.