Mambourin Building
Inspections
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Bored pier inspection in Mambourin

Where the engineer has specified piers, we check the holes and the steel after drilling and before concrete fills them for good.

  • Once the piers are drilled and caged, before a drop of concrete
  • About 1 hour on site
  • Report within 24 hours
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Fully licensed & accredited

Stage1 of 7
When to bookOnce the piers are drilled and caged, before a drop of concrete
Time on siteAbout 1 hour on site
Inspected againstAS 2870, AS 3600, the geotechnical report and the engineer's footing design

What is included in a Mambourin bored piers inspection

  • Pier positions and spacing against the footing plan
  • Pier diameter checked at the top of each hole
  • Depth against the engineer's design and the soil report
  • Founding material at the base where visible
  • Reinforcement cage size, laps and starter bars
  • Cover to the cage and centralisers
  • Hole cleanliness, spoil and loose material
  • Standing water or seepage before the pour
  • Steel projection into the slab or beam
  • Termite and service penetrations near piers
  • Set-out against the site plan and boundaries
  • Records and photographs for the engineer where required
Why it matters here

Bored piers inspections on Mambourin builds

The Werribee Plains can put weathered basalt within a metre of the surface, and piers on Mambourin lots are drilled through reactive clay towards it. Whether each pier reached the depth and bearing the engineer asked for can only be seen now.

What we find at this stage in Mambourin

  • Pier shorter than the engineering depth
  • Cage resting on the base without cover
  • Spoil fallen back into the hole
  • Diameter narrower than specified
  • Steel not tied into the slab beam
Sample findings

Sample defects found during our bored piers inspections in Mambourin

Annotated findings from Bored piers inspections.

Gap between a bored pier and the underside of the slab it supports, found during a defect investigation in Herne Hill
Gap between a bored pier and the underside of the slab it supports, Herne Hill
Reinforcement needing extra bar chairs before concrete, to hold the specified cover, found during a slab pre-pour inspection in Mambourin
Reinforcement needing extra bar chairs before concrete, to hold the specified cover
Steel sagging low in a beam trench, with additional bar chairs required, found during a slab pre-pour inspection in Mambourin
Steel sagging low in a beam trench, with additional bar chairs required
Excavated soil heaped against the slab edge and needing removal before concrete placement, found during a slab pre-pour inspection in Mambourin
Excavated soil heaped against the slab edge and needing removal before concrete placement

The other stages of a Mambourin build

  1. Slab pre-pour inspection in Mambourin2Slab pre-pourThe day before the pour, while pods, steel and membrane are still on show
  2. Frame inspection in Mambourin3FrameWhen the frame and trusses are standing and the roof is on, before wrap and cladding
  3. Lock-up (pre-plaster) inspection in Mambourin4Lock-up (pre-plaster)With roof, windows, cladding and outside doors fitted, before insulation is covered
  4. Fixing inspection in Mambourin5FixingWhen doors, mouldings and cabinets are in and the painter has not started
  5. Waterproofing inspection in Mambourin6WaterproofingAfter the membrane cures and before the first tile is laid
  6. Pre-handover (PCI) inspection in Mambourin7Pre-handover (PCI)About a week ahead of the practical completion date

All construction stage inspections in Mambourin →

Guides

Construction stage guides for Mambourin

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Book a bored piers inspection in Mambourin

Instant online pricing, or talk to the booking team on 1300 471 805.

FAQ

Bored piers inspections in Mambourin: common questions

What is checked at a pier inspection?

Depth, diameter, cage position, cover and how clean the base is, each measured against the engineer's pier schedule.

Why would my Mambourin slab need piers?

The engineer adds them where the soil report shows deep fill, soft ground or rock at varying depth. Not every lot gets them.

How long does a pier check take on a Mambourin lot?

Usually less than an hour for a standard house.

Can piers be checked after the pour?

No. Once filled with concrete, depth and steel placement cannot be seen again.

Who certifies the piers?

The engineer or the building surveyor's inspection does. Our report records what we saw against the drawings.

What happens if a Mambourin pier falls short of its depth?

The report records the measured depth beside the specified depth so the builder can drill further or refer it to the engineer.

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