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Newmarket builds often run on tight, infill blocks and near shared boundaries, where drainage falls, edge formwork and membrane detailing can be easy to miss. A pre-slab check helps ensure the base stage is set up correctly before concrete locks everything in.
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We review the condition of the prepared subgrade and base layer for signs of soft spots, disturbance from recent rain, or uneven build-up. This matters because the slab relies on consistent support; poorly prepared areas can contribute to movement, cracking and uneven floors later.
We check formwork lines, slab edge steps and rebates, and whether the set-out appears consistent with the build documentation provided on site. Correct formwork reduces the risk of out-of-square walls, brickwork alignment issues and edge exposure that can compromise finishes and drainage at the perimeter.
We assess reinforcement positioning, lap lengths where visible, and the use of appropriate chairs/spacers to help keep steel at the intended height during the pour. Steel that sits too low or shifts can reduce slab performance and lead to cracking patterns that are difficult to rectify once the home is built.
We inspect the membrane for tears, punctures, poor overlaps and unsealed joins, including around perimeter edges where it’s often disturbed. A continuous, well-sealed vapour barrier helps limit ground moisture migrating into the slab, which can affect flooring systems and internal humidity.
We check visible plumbing/electrical penetrations for placement, protection and whether the membrane is properly detailed around them. Early identification of misplaced penetrations can prevent expensive cutting, patching and waterproofing issues later in bathrooms, kitchens and laundries.
We look over trenching backfill areas, edge transitions, and any visible provision for terminations/joins that will be concealed by concrete. This is the last practical opportunity to document key base-stage elements with photos before they’re permanently covered.
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Find answers to the most frequently asked questions about our inspection service.
Book as soon as your builder confirms the pre-pour date. The ideal time is after formwork, reinforcement and the vapour barrier are installed, and after key plumbing penetrations are in place, but before any concrete is poured. In Newmarket, where access can be tight on infill blocks, scheduling early helps avoid missing the narrow inspection window.
A Stage 1 inspection can identify problems like poorly prepared base material, formwork that appears out of line, reinforcement that may not be properly supported, torn or poorly overlapped vapour barriers, and penetrations that look incorrectly located or inadequately sealed. These are the types of items that become very difficult to verify or rectify once the slab is in.
We compare what’s visible on site to the documentation available at the time of inspection (such as drawings and details provided by the builder). We focus on practical buildability and obvious discrepancies that warrant clarification. Final certification remains the responsibility of the relevant building surveyor and engineer, but our report helps you ask the right questions before the pour proceeds.
They can be, simply because townhouse and infill projects often involve shared driveways, close boundaries and limited room to correct falls once hard surfaces go down. At the pre-slab stage, we pay close attention to perimeter detailing, slab edges and any visible set-out implications that could affect external drainage outcomes later. Getting these basics right early reduces the chance of water sitting against the building.
You’ll receive a detailed report with labelled photos and clear, prioritised recommendations that you can forward to your builder or site supervisor. The report focuses on what was accessible and visible before the pour, highlighting items that should be addressed immediately and items that may need confirmation from engineering or the building surveyor. If you need clarification, we can talk you through the findings.
Still have questions?
Get in TouchACE Building and Pest Inspections gives you a photo-documented Stage 1 check of formwork, steel and moisture barrier detailing so you can request fixes early. Call 0485 857 077 to secure an inspection time in Newmarket.