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Fairfield rebuilds and extensions often sit on tight blocks near mature trees and variable ground around the Yarra corridor—getting the base stage right helps prevent slab movement, moisture issues and drainage headaches later.
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Our comprehensive service includes everything you need to make an informed decision about your property.
We check slab dimensions, rebates and step-downs against the plans, along with formwork straightness and bracing. Accurate set-out matters on Fairfield’s narrower sites where a small error can affect boundary clearances, garage levels, and drainage falls.
We inspect excavation cleanliness, removal of soft spots, and evidence of uncontrolled fill or debris from previous structures. This reduces the risk of localised slab settlement, which can be more common on knock-down rebuild blocks in Fairfield.
We look for appropriate placement of base material, consistency across the slab footprint, and signs that the base may not have been prepared uniformly. A well-prepared base supports the slab evenly and helps prevent cracking driven by differential movement.
We verify mesh and bar placement where visible, lap lengths, beam reinforcement positioning, and that chairs/supports keep steel at the correct height. If reinforcement sits too low or shifts during the pour, the slab can lose strength where it needs it most.
We check the polyethylene membrane for continuity, overlaps, tears, and taping, plus how plumbing penetrations are detailed. Good sub-slab moisture control matters in Fairfield where wet weather, garden irrigation and shaded lots can keep ground moisture elevated.
We assess visible sub-slab services, slab penetrations, and whether the base stage allows for planned surface water management around the building. Catching clashes and missing provisions before the pour helps avoid jackhammering concrete to fix drainage or plumbing set-outs.
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Find answers to the most frequently asked questions about our inspection service.
Book it once the site has been prepared, formwork is installed, reinforcement is tied, services are in place and the vapour barrier is laid—yet before concrete is poured. In Fairfield, access can be tight on infill blocks, so confirm the pour date early and allow time for any fixes. If changes are needed, it’s far cheaper to adjust steel or membrane now than after the slab cures.
Typical findings include reinforcement not correctly supported on chairs, laps that don’t match the drawings, poorly braced formwork, membrane tears around penetrations, and set-downs that don’t suit wet areas or garage levels. We also see problems where services clash with beams or ribs. These are all practical to fix pre-pour but expensive once concrete is down.
We compare what’s visible on site to the engineer’s drawings and the relevant standards, focusing on items that can be verified prior to the pour—set-out, reinforcement placement, membrane continuity and detailing. We don’t redesign the slab, but we flag discrepancies, missing details and workmanship issues so you can request clarification or rectification from the builder or engineer before proceeding.
Yes. Fairfield has many established street and backyard trees, and trees can influence moisture in reactive soils, contributing to ground movement over time. At the base stage, it’s important the excavation, base preparation and slab detailing match the engineer’s intent for the site conditions. We also look for practical moisture-barrier detailing and drainage provisions that help manage seasonal moisture changes around the slab.
Sloping sites often rely on stepped footings, retaining elements and carefully managed drainage. Before the pour, we check that step-downs and levels match the plans, formwork is well braced, and reinforcement is positioned correctly through any steps and beams. We also look for signs of uncontrolled cut-and-fill and whether the base preparation appears consistent across the slab footprint.
Still have questions?
Get in TouchACE Building and Pest Inspections checks the base stage in detail—formwork, steel, vapour barrier and set-out—so you can raise clear fixes with your builder while changes are still simple. Call 0485 857 077.