Insufficient vibration/compaction; congested rebar; poor mix workability; leaky formwork; excessive drop height; premature set; inadequate pour inspection.

1. Map: location, extent, member type, elevation
2. Visual classify: surface bugholes vs deep honeycomb
3. Sounding (hammer chain) — delamination boundaries
4. Measure depth via breakout (min 3 points/zone)
5. Rebar cover check: covermeter / GPR
6. Structural concern → UPV, rebound, or cores per SE plan

1. Structural patch repair — breakout to sound concrete + polymer-modified repair mortar; best for deeper honeycomb
2. Surface repair — bagging/skim only if shallow, no durability/cover impact
3. Engineer-designed jacketing — if significant section loss or major voids

Pre-repair: hammer sounding to sound concrete. Post-repair: cover restored (covermeter), cure compliance, compressive strength evidence if specified. Photo verification before concealment.

Silica dust controls for all breakout/grinding operations. Comply with Safe Work Australia crystalline silica guidance. Exclusion zone if spall risk.

AS 3600:2018; NCC Part A5; Safe Work Australia silica guidance; CCAA Concrete Testing & QA (GTCC 2020).

Delayed placement beyond initial set; insufficient roughening/cleaning; laitance not removed; no shear key/dowel continuity; inadequate re-vibration at interface; early form stripping.

1. Identify: intended joint (per pour plan) or unintended cold joint
2. Visual: continuity and seepage
3. Water test where watertightness is required
4. Sounding: delamination assessment
5. UPV comparative checks across joint; cores if SE requires

Temporary water diversion/seal if active seepage. Stop finishing trades. NCR. Consult structural/waterproofing engineer if in tanking zone.

1. Resin (epoxy) injection — structural joint crack, no movement expected
2. PU injection — leakage sealing priority
3. External bandage membrane — engineered detailing required
4. Breakout and re-cast/jacket — if bond failure is significant

Injection logs (volume, pressure, refusal). Water tightness re-test. Monitor for recurrence.

Sealing only from the “easy side” without addressing hydrostatic head path. Coordinate with waterproofing and services penetrations.

Rapid surface evaporation (hot/windy conditions); insufficient curing; delayed finishing; high mix water demand; no evaporation control measures during pour.

1. Confirm timing (hours after pour)
2. Measure crack widths and lengths; map extents
3. Determine if shallow vs through-depth (breakout at representative crack)
4. Acceptance: UNSPECIFIED — SE to confirm; serviceability may accept shallow near-surface cracks

Start/restore curing immediately. Protect surface from further evaporation. Restrict traffic. Do not delay — cracks widen if curing is not restored promptly.

1. Surface sealing or thin repair — shallow cracks with no durability implication
2. Routing + sealant — for durability where crack is confirmed shallow
3. Resin injection — only if structural or through-crack confirmed by SE

Waiting until concrete dries before acting. Cracks widen and become permanent durability pathways. Act within hours of pour, not days.

CCAA Concrete Testing & QA (curing and performance); VicRoads TN-061 (NDT of concrete).

Under-reinforcement; design/detailing mismatch; overload; restraint/thermal movement; settlement; construction deviations (rebar placement/cover); PT issues; discontinuous load path.

1. Make safe if collapse risk suspected — exclusion zone
2. Crack mapping and monitoring (tell-tales; digital gauges)
3. Measure crack widths over time and loads
4. Review as-builts; rebar scan (covermeter + GPR)
5. UPV for integrity; rebound for comparative surface hardness; targeted cores if required
6. Acceptance: UNSPECIFIED — SE to define per exposure class and design standard

Restrict loading. Install props/temporary works if directed by SE. Stop adjacent trades. Escalate to structural engineer immediately. Issue high-risk NCR.

1. Engineer-designed strengthening — FRP, steel plate, additional members if capacity deficient
2. Crack injection + load redistribution — only if root cause resolved
3. Rebuild element — if noncompliance is severe

Treating the symptom (injecting crack) without eliminating the cause (movement, overload). SE must confirm root cause and acceptance before any injection.

AS 3600:2018; VicRoads TN-038 (Cracks in Concrete); VicRoads TN-061 (NDT limitations).

Inadequate cover; chloride ingress; carbonation; water ingress from façade/balcony; poor compaction; design exposure mismatch; cracked protective coatings.

1. Sounding survey — define delamination boundaries
2. Cover measurement (covermeter); depth of delamination
3. Corrosion extent: visual, bar loss estimate; SE assesses section loss
4. Identify water source — link to façade/waterproofing defect
5. Acceptance: UNSPECIFIED — SE durability/capacity criteria; correlate to AS 3600 exposure classification

Barricade falling concrete zone. Catch platform if overhead risk. Temporary seal to reduce water ingress. Issue NCR.

1. Breakout to sound concrete + clean rebar + patch repair + protective coating
2. Cathodic protection — if widespread (specialist required)
3. Element replacement — if corrosion is severe

Patching without fixing the water ingress source. Corrosion returns. Link NCR to the relevant F-series or W-series defect driving the moisture ingress.

AS 3600:2018 exposure classifications; Building Commission NSW defect library (structure themes); silica dust controls.

Bar chairs displaced; congestion; poor pour control; incorrect spacers; rebar fixed wrong; formwork tolerance issues.

1. Systematic cover survey — grid sampling plan
2. Confirm covermeter calibration and bar size assumptions
3. For deeper/dense steel: use GPR
4. Compare to design cover: UNSPECIFIED — insert exposure class and cover requirements from project specification
5. If noncompliant: structural engineer to assess

Flag and hold follow-on trades. If rated element, consider fire safety implications. Issue NCR.

1. Engineer acceptance with durability mitigation (coatings) — if deviation is small
2. Breakout and rework — if deviation is significant
3. Strengthening — if structural capacity is impacted

Relying on a single covermeter reading. State measurement limitations clearly in the inspection record. Covermeter accuracy varies with bar size, depth, and density.

AS 3600:2018; VicRoads TN-061 (covermeter/GPR performance); NCC Part A5.

Inadequate scanning before drilling; poor as-built tendon mapping; uncontrolled coring; unapproved post-installed anchors near PT zones.

STOP WORK immediately. Establish exclusion zone. Temporary shoring if directed by SE. Report as high-risk NCR. PT specialist to attend within 24 hours.

1. PT specialist repair — splice/replace with engineer design; stressing records required
2. Strengthening — FRP/steel if tendon capacity compromised
3. Re-design penetrations — reroute services, update as-built tendon mapping

Post-repair stressing records. Structural engineer signoff. Updated as-built tendon mapping. Permit-to-drill register breach recorded.

Never “patch and paint” without PT specialist and SE signoff. Always update as-built tendon mapping after repair. Coordinate MEP penetrations and firestop/waterproofing re-detailing.

AS 5216:2021 (design of post-installed anchors); GPR/NDT methods; project structural specification.

Formwork set-out error; missing camber; overload; creep/shrinkage over time; poor screed falls; incorrect drainage outlet placement.

1. Laser level survey — falls profile and deflection
2. Compare to design set-out and required drainage falls
3. Identify: structural deflection vs screed layer issue
4. Acceptance: UNSPECIFIED — structural deflection limits by SE; falls per waterproofing standard where applicable

Temporary drainage (squeegee schedule, temporary kerb/drain) to prevent water ingress to spaces below. Protect below areas from ceiling staining.

1. Reform falls using engineered screed — if structural slab is acceptable
2. Add drainage points — design approval required
3. Structural strengthening — if deflection is unacceptable to SE

Adding tile bed to “fix falls” without verifying threshold height, door clearance, and finished floor level against neighbouring elements. Coordinate with waterproofing membranes.

NCC Housing Provisions Cl 10.2.12 (falls where floor waste installed); AS 4654.2:2012 (external waterproofing design); NCC Part F1.

Incorrect WPS/WPQ; inadequate preheat; poor fit-up; contamination; unqualified welder; rushed schedule; insufficient inspection hold points.

1. Visual inspection to weld acceptance criteria (project WPS)
2. Verify welder qualifications and WPS compliance records
3. NDT as specified: MT/PT/UT per engineer/QA plan
4. Acceptance: UNSPECIFIED — project welding specification and structural welding standard governs

Stop loading/erection in affected area. Isolate hot works. Issue NCR. Hold erection progression until SE confirms safe.

1. Gouge/remove and re-weld to approved WPS with NDT re-test
2. Weld repair procedure with NDT confirmation
3. Component replacement — if repair is not feasible

Grinding to “make it look good” without requalification and NDT. All weld repairs must be documented with WPS reference and re-tested.

AS 4100:2020 (steel structures); Safe Work Australia welding code of practice; fire watch protocol for hot works.

No drilling permit; wrong drill bit diameter; inadequate hole cleaning; incorrect setting tool; torque not applied; installed into cracked zone or low-strength concrete; edge distance violation; substitution without evidence.

1. Verify anchor type and evidence package (approval scope)
2. Measure hole diameter/depth and edge distances
3. Check torque and witness marks (torque wrench)
4. Proof load testing where specified by SE
5. Acceptance: UNSPECIFIED — SE design criteria; installation per manufacturer and AS 5216:2021

Barricade suspended loads. Temporary support. Issue NCR. Halt all similar installations pending toolbox talk and inspection protocol review.

1. Remove and reinstall correctly to approved WPS
2. Engineer-approved alternative anchor system with revised calculation
3. Cast-in retrofit — if high criticality and access permits

“Same size anchor” substitution is not acceptable without evidence of suitability. Anchor capacity depends on product, installation method, concrete strength, and edge distance — all must match the evidence.

AS 5216:2021 (design of post-installed anchors in concrete); NCC Part A5 (evidence of suitability); silica dust controls for drilling.

Failed or missing gaskets; blocked weep holes; incorrect joint sealing; pressure equalisation failure; missing end dams; incorrect stack joint design; installation tolerance issues.

1. Document leakage conditions (wind/rain direction, level)
2. Internal moisture mapping; infrared screening if available
3. External visual: gaskets, caps, weep holes
4. Controlled hose nozzle test / hose protocol (project-specific)
5. If major: AS/NZS 4284 façade performance testing (representative bay)
6. Acceptance: UNSPECIFIED — project façade performance criteria

Protect interiors (catch trays, temporary seal). Isolate electrical risk. Notify façade contractor. Prevent mould growth (dehumidification, drying).

1. Re-establish drainage plane — clear weeps, correct end dams, replace gaskets; best if system fundamentally sound
2. Local disassembly and re-seal of joints
3. Re-engineer failed detail — add baffles/flashings with façade engineer approval

Post-remedy hose test. Verify weep function (water tracking test). Photographic evidence of weep before/after.

“Sealant-only” repair where the real failure is blocked drainage or a stack joint design deficiency. Sealant will fail again.

No sill pan/flashings; membrane discontinuity; incorrect sealant type; frame not plumb/square; fixings distorting frame; missing packers; blocked drainage; noncompliant installation to AS 2047.

1. Verify window type and installation detail vs approved drawings
2. Check plumb/square/diagonals; verify drainage slots
3. Remove internal trim locally to inspect flashing/membrane continuity
4. Water test at perimeter (progressive)
5. Acceptance: UNSPECIFIED — project façade/window tolerances; installation per AS 2047; glazing per AS 1288

1. Remove and reinstall with correct flashing, sill pan, and packers
2. Rebuild perimeter waterproofing/air seal
3. Upgrade detail — head flashing/drip if design deficiency

Sealing interior only. The true water path is external. Coordinate internal finishes repair to occur after external remedy is verified.

AS 2047:2014 (windows and external glazed doors); AS 1288:2021 (glass in buildings); AS/NZS 4284:2008 (façade testing).

Wrong sealant type for substrate/movement; no primer; poor surface preparation; incorrect joint dimensions/backer rod sizing; installation in wet or dusty conditions; UV degradation; incompatible cleaners post-installation.

1. Adhesion check (careful pick test)
2. Verify joint geometry and backer rod presence
3. Check substrate cleanliness and primer evidence in records
4. Acceptance: UNSPECIFIED — project sealant spec; confirm movement capacity and adhesion requirements

1. Full rake-out and replace with correct system and primer (preferred)
2. Localised repair — only if failure is isolated and root cause identified
3. Redesign joint — if movement exceeds sealant capacity

Primer application records. Joint dimension checks before installation. Cure time before water testing. Sealant batch and expiry records.

“Cap over” old sealant traps moisture between old and new sealant and fails again within 12 months. Always rake out fully.

Mortar droppings bridging cavity; no cavity trays; weeps spaced incorrectly or filled with mortar; sarking/membrane laps incorrect; poor detailing at openings and lintels.

1. External survey: weep locations and blockages
2. Borescope cavity inspection at representative bays
3. Internal moisture mapping
4. Acceptance: UNSPECIFIED — project façade specification and detailing requirements

1. Clear accessible weeps; temporary protection — immediate action
2. Remove and reinstate weep/flashings locally
3. Install retrofit weep vents and cavity clearing
4. Rebuild affected wall zones — if systemic failure

Verify drainage path with controlled water introduction. Borescope images before and after. Moisture readings.

Addressing only the internal stain while the cavity remains saturated. Drying the internal surface does not resolve the drainage failure in the cavity.

Edge seal failure; manufacturing defect; installation stresses on frame; frame distortion causing glass stress; thermal shock; incompatible sealants used during installation.

1. Confirm fogging is inside IGU vs internal surface condensation (humidity-related)
2. Check frame distortion and glazing packers
3. Review warranty documentation and batch records

1. Replace IGU — primary remedy
2. Upgraded IGU spec if root cause is thermal/load-related
3. Adjust glazing method if frame distortion is driving IGU failure

Misdiagnosing humidity condensation on the internal pane surface as IGU failure. Confirm fogging is between the panes before ordering replacement IGUs.

AS 1288:2021 (glass in buildings); AS 2047:2014 (windows); manufacturer warranty conditions.

Incorrect fastener type or torque; insufficient number of fixings; thermal movement not accommodated; subframe tolerances incorrect; missing isolation washers; unapproved product substitution.

1. Physical check for panel movement (safe access required)
2. Verify fixings pattern vs approved shop drawings
3. Check torque and washer systems
4. If systemic suspected: remove sample panel for investigation
5. Acceptance: UNSPECIFIED — façade engineer/manufacturer criteria

Barricade drop zone if risk of panel fall. Temporary restraint. Stop works on affected elevations. Issue NCR.

1. Resecure/replace fixings to approved specification
2. Add fixings or redesign subframe with SE approval
3. Replace damaged panels

Tightening fixings without checking thermal movement allowance — over-tightening in a system requiring movement slots causes panel distortion and cracking.

Thermal bridging through structure; insufficient ventilation; air leakage transporting moisture; missing/incorrect vapour control layer; residual construction moisture not dried; HVAC system imbalance.

1. Confirm moisture source: leak vs condensation (data logger, humidity readings)
2. Infrared screening (project-specific)
3. Inspect ventilation exhaust operation
4. Acceptance: NCC Part F8 intent is to manage condensation risk

1. Improve ventilation/exhaust and air sealing
2. Add insulation/thermal breaks at cold bridges
3. Redesign vapour control strategy — façade engineer required for systemic issues

Repainting without implementing a moisture strategy. Mould returns. Coordinate with mechanical commissioning — exhaust fan performance is often the primary driver.

NCC 2022 Part F8 (condensation management); HVAC design intent per AS 1668.1.

Product substitution without evidence; misunderstanding of “system” vs “component” classification; missing test evidence; incomplete documentation; nonconforming building products.

1. Assemble evidence pack: system drawings, product datasheets, certificates, test reports
2. Verify system classification/test pathway — AS 5113 as applicable
3. Site verification: open-up to confirm build-up matches evidence
4. Fire engineer to confirm compliant system

Stop installation. Quarantine suspect materials with chain-of-custody. Escalate to fire engineer and certifier immediately.

1. Replace with compliant system
2. Engineering assessment with additional testing — rare, very high cost
3. Cladding rectification strategy — pattern book approach where applicable

Collecting a single product certificate does NOT verify the whole system build-up. The fire performance classification applies to the tested system configuration — every component and layer must match the evidence.

AS 5113:2016 (external wall system classification); NCC Part C; ABCB guidance on demonstrating NCC compliance using AS 5113.

Membrane omitted or discontinuous; wrong waterproof vs water-resistant designation; incorrect junction detailing; insufficient membrane height on walls; incompatible substrate; penetrations not sealed.

1. Identify compliance pathway: Housing Provisions vs AS 3740 method (record on project)
2. Review installation stage photos/test records if available
3. Moisture mapping; inspect plumbing penetrations
4. Where needed: remove localised finishes to confirm membrane presence/termination

Stop water use if severe. Isolate fixtures. Protect space below. Dehumidify to prevent mould establishment.

1. Full re-waterproof affected wet area (preferred when membrane integrity uncertain)
2. Partial re-waterproof if localised and terminations can be correctly reinstated
3. Plumbing repair only — only if defect is confirmed as purely plumbing (rare)

ITP hold points: substrate, primer, detailing, DFT, flood test, pre-concealment. Falls verification where floor waste present. All records retained per NCC A5.

NCC Housing Provisions Part 10.2; AS 3740:2021; Building Commission NSW wet area guidance.

Where a floor waste is installed: minimum 1:80, maximum 1:50 — NCC Housing Provisions Clause 10.2.12. This is a DTS threshold, not project-specific.

1. Confirm floor waste presence and drainage intent
2. Laser level survey of finished surface falls to waste
3. Compare measured falls to NCC 1:80–1:50 requirement
4. Verify substrate falls under membrane per AS 3740 if that pathway is used

Slip hazard signage. Temporary squeegee protocol. Isolate if overflow to adjacent spaces.

1. Remove finishes and reform screed to compliant falls + reinstate waterproofing (preferred)
2. Rebuild tile bed/screed if substrate/membrane is correct and falls error is only in tile layer (confirm before proceeding)
3. Relocate/adjust waste — requires hydraulic design approval

Regrouting to “fix ponding.” Never works. Coordinate door threshold heights and accessibility requirements before increasing screed thickness.

Membrane not turned up; termination bar missing; inadequate height above finished surface; incompatibility with door frame; poor flashing detail at threshold.

1. Inspect threshold detail vs approved drawing
2. Confirm membrane upturn height and termination method (open-up if required)
3. Controlled hose test at threshold
4. Acceptance: UNSPECIFIED — project detail; AS 4654.2 design and installation rules apply to external waterproofing systems

1. Remove finishes at threshold and reinstate membrane termination correctly (preferred)
2. Replace door sill flashing system — engineered solution
3. Full balcony membrane replacement if threshold failure is symptomatic of systemic defect

Sealant-only fix. Water tracks behind the frame and continues to ingress. Must open up and correctly terminate the membrane at the threshold.

AS 4654.2:2012; NCC Part F1 external waterproofing intent.

Wrong waste fitting (no integral flange); flange omitted; poor bonding of membrane to flange; membrane cut short of flange; incompatible adhesive system.

1. Remove grate; inspect LCF presence and condition
2. If uncertain: localised opening-up around waste to confirm membrane termination method
3. Must meet NCC wet area waterproofing intent and AS 3740 detail requirements

Stop water use. Seal temporarily around waste. Protect below.

1. Remove finishes, install compliant flange, re-terminate membrane, retile
2. Full wet area re-waterproof if multiple wastes or details are suspect

Replacing the grate only. The leak is at the membrane-to-flange interface, not the grate. Coordinate plumber + waterproofer + tiler sequencing — all three trades are involved in correct installation.

NCC Housing Provisions Part 10.2; AS 3740:2021.

Membrane puncture; poor terminations; inadequate falls; poor drainage; incorrect set-down; planter interface failure; movement joint failure.

1. Map leak under balcony (internal) — identify quadrant
2. External survey: ponding and termination defects
3. Moisture mapping and progressive water testing
4. Confirm membrane system vs AS 4654.2 design/installation requirements
5. Acceptance: UNSPECIFIED — project waterproofing system spec

1. Full remove and replace membrane system (preferred for systemic failures)
2. Localised repair only if damage is isolated and terminations are confirmed compliant
3. Redesign thresholds/drainage with engineer direction

Flood test/hose test; verify falls; photos at all details before finishes. ITP hold at each membrane layer and detailing stage.

Patching without solving the falls/drainage root cause. Also coordinate façade, door supplier, and plumber — multiple trades are often involved in balcony waterproofing failures.

No overflow outlet; inadequate falls; membrane damage by root penetration; poor outlet detailing; absent protection board; incorrect terminations; soil level too high against upturn/upstand.

1. Check containment: overflow, drainage, soil level vs upstand height
2. Dye test or controlled watering
3. Remove soil locally to inspect membrane/protection board if needed
4. Acceptance: UNSPECIFIED — project detail and AS 4654.2 design intent for external systems

1. Remove soil, reinstate compliant membrane + protection board + drainage/overflow
2. Redesign planter with accessible drainage
3. Remove planter/convert to non-soil feature if persistent failure

Repairing only the internal staining. The planter remains saturated and re-wets continuously. Coordinate landscape/irrigation and waterproofing scopes — they often run separately.

Poor flashing detail at penetrations; movement of plant; penetration works executed after membrane installation without reinstatement; missing protection boards; incompatible sealants.

1. Visual survey of all penetrations; check terminations and mechanical fixings
2. Moisture mapping below
3. Controlled water test where feasible
4. Acceptance: UNSPECIFIED — project waterproofing spec; AS 4654.2 framework

1. Reflash penetrations with proprietary collar system
2. Replace membrane zones around penetrations
3. Reconfigure supports to reduce number of penetrations

Uncoordinated after-market penetrations by services trades after membrane installation. Implement a penetration permit system for all roof works post-membrane installation. Update penetration register.

Waterproofing system discontinuity; construction joint leakage; hydrostatic pressure exceeding design; poor subsoil drainage; membrane damage during backfill; inadequate waterstop at joints.

1. Identify water source: groundwater vs plumbing leak
2. Inspect drainage system performance (sumps, subsoil drains)
3. Crack/joint mapping; moisture logging
4. External inspection at accessible areas if possible
5. Acceptance: UNSPECIFIED — below-ground systems are highly project-specific

Pumping. Dehumidification. Temporary injection to reduce active flows if safe and directed by engineer.

1. PU injection sealing at joints/cracks with drainage relief
2. External excavation and re-waterproof — preferred but high disruption
3. Drainage strategy upgrade — engineer designed

Injection without addressing hydrostatic pressure or drainage. Injection seals the crack but pressure forces water through adjacent paths. Drainage relief is essential.

Wrong joint system installed; insufficient movement capacity; incorrect substrate preparation; joint installed after membrane (sequence error); no bond breaker; mechanical damage by traffic.

1. Identify movement joint location per drawings
2. Measure joint opening variation across temperature/time
3. Inspect joint cover and membrane transition
4. Acceptance: UNSPECIFIED — joint system movement rating must meet design movement

1. Replace with engineered movement joint system compatible with membrane
2. Re-detail joint transitions with membrane accessories
3. Increase joint width — requires design approval

Rigid patch across a movement joint. Will fail within one thermal cycle. Movement joints require flexible, movement-accommodating systems — never rigid fillers.

Inadequate substrate assessment before overlaying; incompatible primers; movement joints not respected through overlay; trapped moisture; incorrect surface preparation/abrasion.

1. Confirm overlay method and manufacturer system approval (overlay systems are not universally applicable)
2. Tap test for hollowness; check moisture levels before overlay
3. Confirm surface preparation method matches manufacturer requirements
4. Acceptance: UNSPECIFIED — must match manufacturer’s approved overlay methodology

1. Remove overlay and reinstate from substrate — most robust option
2. Local repair only if limited failure with identified root cause

Overlay used to avoid demolition cost without confirming substrate suitability. If the substrate has substrate moisture, movement, or hollowness, the overlay will fail. Not a shortcut.

Trade coordination failure; late services installation; substitution with non-tested products; misunderstanding of tested configuration; no firestop register maintained.

1. Identify FRL element and penetration type (pipe/cable/duct)
2. Measure opening size, annular gap, penetrant type and insulation
3. Verify installed system matches test report/assessment and installation instructions
4. Check NCC Spec 13 and AS 4072.1 compliance
5. Acceptance: must match tested evidence — any deviation = nonconforming

If high risk (egress paths/shafts): seal temporarily with approved interim method (fire engineer direction). Restrict ceiling closure. Issue NCR immediately.

1. Remove and reinstall to tested system configuration — preferred in all cases
2. Engineer assessment — only for minor, documented deviations with written acceptance

Firestop register entry. Labelled penetration (ID, product, test reference, date). Pre-concealment WIR. Photo of configuration. Re-inspect after adjacent trades complete.

Installing standard PU “fire foam” without verified tested system evidence. The product must be part of an evidenced tested configuration. “Fire-rated” on the can is not sufficient.

Incorrect product selection; oversight in trade coordination; late plumbing installation; no firestop subcontractor coordination at time of penetration.

1. Identify pipe material and OD
2. Check collar size and fixing method vs tested system
3. Verify tested system reference (test report scope must cover pipe type, OD, and FRL)

1. Install correct collar system per tested configuration (anchors, orientation, clearances)
2. Re-route to compliant sleeve/pathway device if congestion prevents correct installation

Label and register. Photo of collar installed, fixing points, pipe ID marking. Verify anchorage meets tested system installation guide.

Assuming sealant alone provides closure for a plastic pipe. Plastic pipes melt out in a fire, leaving an open annular gap unless a fire collar is present to close the opening as the pipe melts.

NCC Specification 13; AS 4072.1:2005; manufacturer installation guides (e.g. 3M, Hilti, Trafalgar — system-specific).

Cable tray installed after firestop system (sequence error); oversized openings not reduced before sealing; wrong products specified; inadequate backing/support; poor compression of pillow systems.

1. Measure opening, penetrant fill ratio, and annular gaps
2. Verify system is tested for cable trays/bundles and the specific opening size
3. Check fill ratio — tested systems specify maximum and minimum fill ratios
4. Acceptance: must match tested limits and installation method

1. Reconfigure to tested modular system (blocks/plugs/planks)
2. Reduce opening size with approved framing and install tested system
3. Reroute services to multiple smaller penetrations

Future cable additions compromise the system and are not re-registered. Specify re-enterable solutions where future cabling is expected. Any addition to the cable fill requires a register update and re-inspection.

NCC Specification 13; AS 4072.1:2005; 3M fire barrier blocks/plugs/planks installation guide.

Services congestion at head-of-wall; ceiling installed before fire sealing was completed; unclear scope boundary between drywall contractor and firestop contractor; lack of inspection access after installation.

1. Access ceiling void; verify barrier continuity to slab/structure and around services
2. Confirm FRL requirements of the wall line
3. Must match FRL design intent and sealing system evidence

1. Install tested linear joint firestop system — continuous run at head-of-wall
2. Rebuild head detail with compliant materials where gap is too large for linear system

Photo evidence of continuous run. End-to-end coverage across the full wall length including around services. Label and register entry.

Only auditing service penetrations and ignoring the top-of-wall gap — one of the most common concealed fire barrier failures. Must be inspected before ceiling closure regardless of whether penetrations are present.

AS 4072.1:2005; NCC Part C4 (openings protection concept).

Coordination failure between ceiling contractor and ductwork contractor; missing access requirements in documentation; product substitution; incomplete commissioning process.

1. Verify damper locations vs approved drawings
2. Inspect access panel presence and clearance for maintenance
3. Witness functional testing (open/close) per commissioning plan
4. Acceptance: UNSPECIFIED — fire engineer/mechanical engineer; AS 1668.1 smoke control compliance

1. Install compliant access panel and reinstate FRL at new opening
2. Replace/repair damper
3. Recommission smoke control system with full cause-and-effect verification

Cutting access without reinstating the FRL at the new opening. Every new access point in a rated element requires a fire-rated access panel and firestop reinstatement around the frame.

AS 1668.1:2015 (smoke control); NCC referenced documents including AS 1668 usage.

Incorrect hardware specified or installed; poor installation; frame misalignment; damaged seals; user interference (door wedges); unapproved modifications post-installation.

1. Visual check: tag/ID confirmed
2. Cycle test: open to 90°, release, confirm closes and latches without assistance
3. Check closer adjustment; hinges; latch alignment; floor clearance
4. Must meet fire door functional requirements per AS 1905.1

Remove wedges immediately. Signage. Restrict occupancy/egress reliance if critical to egress path. Escalate to builder PM.

1. Repair/replace closer with approved hardware (fire-rated, correct power size)
2. Rehang/realign door within frame
3. Replace doorset if noncompliant configuration cannot be remediated

Replacing hardware with non-fire-rated items. All closer, hinge, and latch components must be compatible with the fire door certification and tested doorset configuration.

NCC Specification 12; AS 1905.1; AS 1530.4 (tested via Spec 12 pathway).

Industry guidance indicates 3–10 mm between leaf and floor depending on threshold conditions; up to 25 mm to a non-combustible threshold in certain certification contexts. Measurements taken at multiple points across door height. Must conform with doorset evidence of compliance.

1. Measure clearances with calibrated gauge at multiple points (top, mid, bottom of each edge)
2. Compare to doorset evidence of compliance and applicable standard
3. Confirm whether any threshold seal systems are installed and their certification status

Fit temporary smoke seals only if permitted and confirmed not to invalidate certification. Restrict signoff for affected zones.

1. Adjust door/hinges/closer to reduce gap
2. Install compliant threshold/seal system that preserves certification
3. Replace door leaf/doorset if outside tolerance

Adding floor finish after door installation changes the floor-to-door clearance. Coordinate floor finishing trade sequencing and confirm clearance after floor finish is installed.

NCC Specification 12; fire door clearance guidance notes; fire door tagging and inspection guidance.

Product substitution by subcontractor; late coordination; misunderstanding that surrounding rated plasterboard makes the panel itself compliant (it does not).

1. Verify panel certification/evidence of suitability for required FRL
2. Inspect installation to manufacturer requirements
3. Check perimeter gaps and seal integrity
4. Must maintain FRL continuity and match evidence

1. Replace with certified rated access panel system
2. Engineer assessment for alternative solution — rare

Assuming that “fire-rated plasterboard around the panel makes the panel compliant.” The panel opening itself requires a fire-rated panel system — the surrounding lining does not provide FRL to an unrated opening.

NCC Part A5 (evidence of suitability); ABCB Evidence of Suitability Handbook.

Poor record control by subcontractor; documentation not required at procurement stage; uncontrolled product procurement (no approved supplier list); no firestop register maintained during installation.

1. Audit-based approach: identify full penetration list for zone
2. Cross-check each penetration to documentation
3. Acceptance: no evidence = nonconforming until proven otherwise

Freeze ceiling closure. Implement “firestop audit blitz” for all penetrations in zone before any ceiling is closed. Issue NCR for zone.

1. Obtain evidence and verify match to installed product
2. Remove and reinstall to documented tested system — if evidence cannot be produced

Trying to reconstruct documentation after ceilings are closed. Not possible for concealed elements — which is why ceiling closure hold points are mandatory. Act before closure, not after.

NCC Part A5; ABCB Evidence of Suitability Handbook; WA Industry Bulletin 118 emphasis on documentation.

Inadequate adhesive coverage (less than 80% required); wrong trowel notch size; dusty or contaminated substrate; movement joints missing or incorrectly positioned; substrate moisture; incorrect adhesive type for membrane system.

1. Tap test map — identify hollow extent
2. Measure extent; check movement joint positions and widths
3. Review tile installation guidance per AS 3958:2023
4. Acceptance: UNSPECIFIED — project finish tolerances; adhesive coverage per AS 3958

Replace loose or cracked tiles. Restrict access where trip hazard. Prevent water ingress in wet areas through temporary sealing.

1. Remove and relay affected areas with correct substrate preparation and adhesive coverage
2. Full retile if systemic (widespread hollow across the installation)

Coverage checks (spot lift during work). Movement joints verified. Falls rechecked in wet areas after retiling.

Regrouting without investigating and fixing the bond. Also: check waterproofing membrane integrity in wet areas before retiling — do not conceal a waterproofing defect under new tiles.

Poor substrate preparation and flatness; inconsistent adhesive bed; large-format tiles without levelling system; inadequate set-out/control lines.

1. Straightedge checks across tile joints
2. Measure lippage at transitions
3. Check falls where in wet zones (1:80–1:50 to floor waste — NCC requirement)
4. Acceptance: UNSPECIFIED — project finish tolerances; use project spec and applicable tolerance guides

1. Remove and relay with substrate correction and levelling system
2. Grind — only if allowed and does not compromise tile finish or expose aggregate
3. Re-screed and retile if substrate flatness is the root cause

Grinding the tile without rechecking wet area falls requirement where floor wastes are present. Grinding also generates significant respirable silica — must use wet grinding and on-tool extraction.

Differential movement without movement joints; insufficient cure; moisture migration from below; poor mix/installation; substrate movement; no movement joints at columns or perimeter.

1. Identify moisture source (leak vs construction moisture)
2. Check movement joint presence and positioning
3. Check tile bond beneath (tap test)

1. Address movement/moisture root cause first
2. Regrout with correct product after root cause resolved
3. If linked to waterproofing failure: W-series remediation must precede regrout

Cosmetic regrout that hides an active waterproofing failure. Grout will fail again within months. Always investigate whether grout failure is a symptom of membrane failure, not just a workmanship issue.

Frame movement (shrinkage of timber or deflection of steel); insufficient screw spacing; incorrect jointing compound; poor substrate; moisture changes; not following gypsum lining finishing requirements per AS/NZS 2589.

1. Identify crack patterns — differentiate frame movement from poor jointing
2. Check moisture with meter — is condensation driving moisture ingress to lining?
3. Verify fixing spacing based on system specification
4. Acceptance: UNSPECIFIED — project tolerance; workmanship per AS/NZS 2589

1. Re-screw/re-fix fasteners at correct spacing
2. Re-tape and set joints with correct compound and cure time
3. Address moisture/ventilation if condensation-related

Repainting only. Crack returns at next seasonal humidity or temperature cycle. Fix the joint before painting, not after.

AS/NZS 2589:2017 (gypsum lining); NCC Part F8 if moisture-related.

Moist substrate (active leak or condensation); poor surface preparation; incompatible coating systems; painting before substrate cured or dried; soluble salts in substrate.

1. Moisture test substrate — identify whether leak or condensation is driving moisture
2. Identify moisture source before proceeding to any paint remedy
3. Adhesion cross-hatch test (project-specific)
4. Acceptance: UNSPECIFIED — project painting specification; AS/NZS 2311

1. Fix moisture source first (W-series or F7 remedy)
2. Re-prepare and repaint with compatible system once substrate is dry and below moisture threshold
3. Replace damaged substrate if swollen or delaminated

Repainting without fixing the moisture source. Blistering will recur within weeks. Moisture threshold must be confirmed before any repainting.

AS/NZS 2311:2017 (painting of buildings); NCC Part F8 condensation management.

Poor substrate preparation (no primer, dusty, wet); wrong mix design or water/cement ratio; screed too thin for span; absent movement joints; substrate movement during cure.

1. Tap test — map hollow extent across floor
2. Crack mapping
3. Moisture evaluation of substrate
4. Thickness check at cores or edge breaks
5. Acceptance: UNSPECIFIED — project screed specification

Restrict traffic loads. Prevent water ingress in wet areas. Issue NCR.

1. Remove and rescreed with correct preparation, primer, mix, and movement joints
2. Add movement joints if absent — specialist cutting required
3. Rebuild falls if wet area with floor waste

Tiling over hollow screed. Failure propagates into the tile layer and the combined repair is significantly more expensive than addressing the screed before tiling.

Moisture migration from behind stone (waterproofing failure); incompatible cleaning chemicals stripping sealer; wrong sealer for stone type; poor maintenance regime; water ingress behind stone.

1. Identify moisture source — is water infiltrating from behind the stone or from the surface?
2. Review maintenance regime and cleaning products used
3. Spot test sealer performance (water drop test)
4. Acceptance: UNSPECIFIED — project finish spec and manufacturer guidance

1. Fix water ingress first (link to relevant W- or F-series card)
2. Clean and re-seal per stone system manufacturer
3. Replace affected stone if structurally or aesthetically damaged

Treating the stone surface without stopping the moisture source. Staining will return within one wet season. Always trace moisture back to origin before stone works.

VBA water ingress research insights (balconies, roofs, drainage); manufacturer stone sealer bulletins.

Poor jointing (solvent cement, compression, press-fit); wrong fitting type for pressure rating; WaterMark noncompliant product; damage during installation or by subsequent trades; inadequate pressure testing before concealment.

1. Isolate circuits and pressure test (licensed plumber required)
2. Thermal/moisture locating (thermal camera, moisture meter)
3. Open up minimum area to identify joint location
4. Verify WaterMark compliance of products

Isolate water supply. Protect electrical systems in vicinity. Commence dry-out plan to prevent mould establishment.

1. Replace leaking section with WaterMark-certified components; pressure re-test
2. Reinstate firestop and waterproofing at any affected penetrations after plumbing repair

Fixing the plumbing leak but failing to reinstate FRL and waterproofing membrane at penetrations. One NCR closes the leak; a second NCR must close the penetration reinstatement. Do not close both on one record.

NCC Volume Three (Plumbing Code of Australia); WaterMark certification scheme; AS/NZS 3500 (plumbing and drainage).

This defect sits simultaneously under: fire separation (NCC Spec 13 / AS 4072.1), waterproofing termination (wet area membrane at waste), and acoustic isolation (NCC F6 / project acoustic spec). All three must be satisfied in one coordinated works package.

1. Measure annular gap; confirm oversized core if present
2. Inspect firestop system evidence and waterproofing collar detail
3. Verify acoustic sealant specification where required

1. Install tested firestop system + waterproofing collar + acoustic sealant — coordinated in one works package
2. Reduce oversized opening and correctly re-core before sealing
3. Re-route services if congestion prevents compliant sealing

One trade “owning” the penetration means the other disciplines are missed. A formal responsibilities matrix is required: plumber, waterproofer, and firestop subcontractor all sign off before ceiling or soffit closure.

Incorrect set-out of drain line; inadequate support/hanger spacing causing sag; service clashes forcing route changes without grade check; no survey undertaken before concealment.

1. CCTV inspection of drain line
2. Laser grade checks at accessible points
3. Check support/hanger positions and spacing
4. Compare to design and AS/NZS 3500 grading requirements
5. Acceptance: UNSPECIFIED — plumbing design/spec; verify to AS/NZS 3500 series

Clear blockage. Restrict use of fixtures until remediated. Prevent overflow damage to occupied spaces.

1. Regrade and re-support drain line to correct falls
2. Reroute drainage if space constraints prevent regrading
3. Add access points/cleanouts at any remaining grade changes

Clearing the blockage without correcting the grade. Blockage will recur. CCTV inspection post-remediation is required to confirm grade compliance before re-concealment.

Poor coordination with ceiling and lighting layouts; product substitution; incomplete as-built coordination after ceiling changes; QA sign-off not obtained before ceiling closure.

1. Verify installed head layout vs approved sprinkler drawings
2. Check obstruction clearances and deflector heights
3. Witness hydrostatic and flow tests and commissioning records
4. Comply with AS 2118.1 design/installation/commissioning requirements

Prevent occupancy signoff for affected zones. Isolate water discharge risks. Implement fire watch if sprinkler coverage is compromised.

1. Relocate/replace heads per approved drawings
2. Modify ceilings/obstructions to achieve clearance
3. Recommission full system after changes

Ceiling changes after sprinkler installation. All ceiling modifications must trigger a change control check against sprinkler coverage. Implement this as a mandatory RFI hold in the ceiling coordination ITP.

AS 2118.1:2017 (automatic fire sprinkler systems).

Late architectural changes; construction storage becoming permanent; poor set-out of enclosure; coordination failure between hydraulic and architectural.

1. Measure clear access zones per AS 2419.1 requirements
2. Verify location vs approved drawings
3. Witness commissioning tests (flow, pressure)

1. Remove obstructions and implement permanent control (signage, barriers)
2. Reconfigure enclosure
3. Relocate hydrant if necessary — requires hydraulic design approval

“Temporary storage” becoming permanent. Embed hydrant clearance zones in O&M handover documentation for owners corporation to maintain.

AS 2419.1:2021 (fire hydrant installations).

Incorrect device selection for hazard classification; poor system programming; product substitution; incomplete testing; interface issues with smoke control system; ceiling changes after device positioning.

1. Audit device locations vs approved drawings
2. Review cause-and-effect matrix and commissioning results
3. Witness full system testing including smoke control interface
4. Comply with AS 1670.1 design/installation/commissioning requirements

Prevent occupancy signoff. Implement fire watch if required (fire engineer direction). Issue NCR for affected zones.

1. Install/relocate devices per approved drawings
2. Reprogram system per updated cause-and-effect
3. Retest full system — partial retest is not acceptable

Partial retest without full cause-and-effect retest. Any change to the system (device location, programming) requires a full functional retest of all affected zones.

AS 1670.1:2024 (fire detection and warning systems); AS 1668.1:2015 (smoke control interface).

Incorrect air balancing; wrong fan rotation direction; ductwork leakage; damper hardware faults; programming errors; building not sufficiently sealed/complete at commissioning date.

1. Review smoke control design report and commissioning plan
2. Witness functional tests and measurements (pressure differentials, flow rates)
3. Verify installed system matches design (fan sizes, duct layout, damper locations)
4. Comply with AS 1668.1 and NCC smoke hazard management provisions
5. Acceptance: fire engineer to confirm

Prevent occupancy. Implement interim fire safety measures as directed by fire engineer.

1. Rebalance — air balancing contractor with fire engineer oversight
2. Fix dampers/controls/programming
3. Upgrade fans/ductwork if undersized

Commissioning before the building is sufficiently sealed and complete. Smoke control systems rely on building envelope integrity — commissioning in an incomplete building gives inaccurate results.

AS 1668.1:2015 (mechanical smoke control systems); NCC referenced documents.

Late cable pulls after firestop installation; no re-sealing protocol; wrong sealant products; poor coordination between electrical contractor and firestop subcontractor.

1. Identify all penetrations in FRL elements on electrical drawings
2. Measure openings; confirm firestop system and evidence
3. Check cable fill changes (cables added since original sealing)
4. Acceptance: must comply with penetration protection requirements; match tested system

Temporary sealing. Prohibit ceiling closure in affected zones.

1. Install re-enterable tested system (blocks/plugs) where future cabling is expected
2. Install mortar/foam system per tested evidence where fill is complete
3. Reroute and reduce opening size

Firestop is done correctly, then electricians add cables and leave gaps in the seal. Implement a “firestop re-entry” protocol: any cable addition requires a firestop contractor to reinstate and re-register the penetration.

AS/NZS 3000:2018 (wiring rules); NCC Specification 13; AS 4072.1:2005.