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Boronia blocks often sit on sloping terrain near the Dandenong foothills, where drainage, cut-and-fill and wet-weather run-off can affect how a slab performs. A pre-slab check catches base and reinforcement issues before concrete locks them in.
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Checks the exposed ground and prepared base for conditions that can compromise the slab, including soft spots, uncontrolled fill, uneven bearing areas and inadequate preparation around the footprint. This matters in Boronia where cut-and-fill and reworked sites can leave variable ground if not properly prepared.
Assesses formwork straightness, bracing and set-out where visible, including slab edge lines and beam locations. Correct formwork helps maintain slab shape and edge thickness, reducing the chance of thin edges that can crack or allow moisture to bridge into the slab.
Inspects reinforcement layout, laps, placement and support (chairs/spacers) so steel is more likely to sit at the intended height within the concrete. Steel that sags onto the ground or sits too high reduces performance and can contribute to cracking and durability issues.
Reviews the vapour barrier for tears, penetrations, joins and general continuity, particularly around internal corners and service penetrations. In wetter parts of Melbourne’s east, maintaining a continuous barrier helps reduce rising damp and moisture migrating into floor finishes.
Checks plumbing and other penetrations for positioning, spacing and whether penetrations are appropriately detailed to reduce leakage paths and slab weakening. Also reviews set-downs (for showers or wet areas) to help avoid costly rework after the pour.
Looks for obvious site drainage risks while the footprint is open, such as ponding potential, blocked flow paths or missing allowances around the slab edge. On Boronia’s sloping blocks, managing where water will go during and after the build is critical to slab performance.
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Find answers to the most frequently asked questions about our inspection service.
Book it once the site is prepared and the slab is set up—formwork, reinforcement and the vapour barrier installed—but before any concrete is poured. In Boronia, weather can change quickly, so aim to lock in the inspection as soon as your builder confirms the pour date. If the pour is brought forward, call to reschedule so we can still attend pre-pour.
A Stage 1 inspection focuses on what’s been built on site at the base stage and what’s visible before the pour. We don’t replace your geotechnical report or structural engineering design, but we can identify workmanship and installation issues—such as reinforcement placement, membrane continuity and obvious base preparation concerns—that may not match what should be on site.
Typical issues include reinforcement sitting too low due to missing or inadequate chairs, poorly positioned laps, tears or gaps in the vapour barrier around penetrations, and formwork that’s not well braced. We also see problems where service penetrations are crowded or set-downs aren’t formed correctly. These items are far easier to fix before concrete is placed.
Yes. Sloping sites can increase the likelihood of cut-and-fill, stepped footings, retaining interfaces and complex drainage paths. At the base stage, small shortcuts—like poor edge preparation, inadequate detailing around fill transitions, or water pooling near the slab edge—can contribute to movement and moisture problems later. A pre-slab inspection is timed to catch these risks while everything is still exposed.
Knock-down rebuilds often involve disturbed ground, old service lines and reworked levels. At Stage 1, it’s important to look closely at base preparation quality, how penetrations are located and sealed, and whether the vapour barrier is intact around any leftover infrastructure. It’s also worth checking visible drainage paths so water is directed away from the slab during the build.
Still have questions?
Get in TouchACE Building and Pest Inspections provides a Stage 1 report with photos and clear, practical rectification items you can action immediately with your builder. Call 0485 857 077 to secure your inspection in Boronia (3155).