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Windsor blocks are often tight, close to boundaries and services, and many builds involve knock-down rebuilds or extensions behind older homes—making set-out, drainage falls and moisture protection critical before concrete locks everything in.
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Our comprehensive service includes everything you need to make an informed decision about your property.
We review the prepared subgrade and base material for signs of soft spots, ponding or inadequate trimming that can lead to slab settlement or cracking. This is especially important on constrained Windsor sites where machinery access and staged excavation can leave uneven compaction.
We check formwork alignment, slab edge thickness, rebates and any step-downs/step-ups so the slab is formed to the intended design. Errors here can affect brickwork set-out, waterproofing continuity and finished floor levels, and they’re difficult to fix once poured.
We look for obvious set-out red flags such as slab placement relative to fences, existing structures and site constraints, plus whether formwork appears square and level. On Windsor’s narrow allotments, a small set-out mistake can cause major planning and construction complications.
We inspect reinforcing mesh and bars for correct placement, lapping, tying and support (chairs/spacers) so steel sits at the right height in the concrete. Poor support can leave steel too low or exposed, weakening the slab and increasing cracking risk.
We check the membrane for punctures, tears, adequate laps, taping and coverage at penetrations and edges. A compromised vapour barrier can contribute to rising damp, floor coverings issues and ongoing moisture odours—problems that are costly to diagnose later.
We assess slab penetrations for positioning, sleeving and sealing readiness, and look for gaps around pipes that can become pathways for moisture and pests. We also confirm the site is generally pre-pour ready, helping you avoid rushed pours that overlook critical details.
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Find answers to the most frequently asked questions about our inspection service.
Book it for the pre-pour window after the base is prepared, formwork and steel are in, and the vapour barrier is laid—but before concrete arrives. In Windsor, tight site access can compress timelines, so organise the inspection as soon as the builder confirms the pour date. We inspect what’s visible on the day and provide a report you can act on immediately.
We don’t redesign the slab, but we do inspect whether what’s built on site appears consistent with the documentation provided and typical compliance requirements. The focus is on workmanship and installation: base preparation, formwork, reinforcement placement, membrane laps and penetrations. If something looks inconsistent or unclear, we flag it so you can seek clarification from your engineer or builder before the pour.
Common base-stage issues include torn or poorly lapped vapour membranes, reinforcement sitting too low due to missing/incorrect chairs, inadequate lapping or tying, formwork not properly braced, and penetrations with gaps that are hard to seal later. We also see ponding or soft base areas that should be addressed before concrete is placed to reduce movement and cracking risks.
Yes. Windsor projects often involve building close to boundaries, working behind existing dwellings, and managing stormwater on small sites with limited fall. These conditions increase the impact of small errors in set-out, edge detailing and drainage planning. A pre-slab inspection helps catch problems while adjustments are still possible, rather than discovering them after the slab cures and the build is locked in.
At Stage 1, we look for practical drainage concerns that affect the slab base, such as ponding in the excavation, likely flow paths, and whether site levels and preparations appear to direct water away from the slab area. Final stormwater systems are typically assessed later, but identifying drainage red flags before the pour is useful—especially on Windsor blocks where water management space is limited.
Still have questions?
Get in TouchACE Building and Pest Inspections focuses on the base-stage details that are easy to miss on tight Windsor sites—formwork, steel, moisture barriers and penetrations—so you can raise fixes with your builder while everything is still accessible. Call 0485 857 077.