Plumbing & hydraulics
Penetrations for waste, water and gas lines through slabs and walls, sized to the pipe and sleeve.
Holes from 20mm to 600mm
Core
drilling
Round, clean, exactly where it's marked. We core through walls, floors and ceilings for plumbing and hydraulic penetrations, ducting, electrical risers, drainage and structural anchors — in reinforced concrete, brick, block and stone.
What it covers
What we core
HVAC & ducting
Air-conditioning pipe runs, exhaust and ventilation penetrations, cored to the diameter the installer needs.
Electrical & data
Risers and service holes between floors and through fire-rated walls, ready for the sparky.
Balustrades & handrails
Accurate footing holes for posts and stanchions, drilled to depth and plumb.
Anchors & starter bars
Holes for chemical anchors, dowels and starter bars where the engineer marks them.
Drainage & pits
Cores through slabs and retaining walls for stormwater, ag lines and pit connections.
- Diameters
- 20mm to 600mm
- Orientation
- Vertical, horizontal, overhead and angled
- Method
- Wet or dry, depending on the site
- Materials
- Reinforced concrete, brick, block, stone
On the job
What it looks like
How the job runs
Start to finish
-
01
Size and position confirmed
We work off the pipe, sleeve or fixing that is going in, not a guess — 20mm to 600mm, marked and checked before the bit touches anything.
-
02
Scan first where it matters
In a suspended slab or a post-tensioned floor, what is inside the concrete decides whether the hole can go where it is marked. Post-tensioned slabs get scanned, always.
-
03
Rig anchored and sealed
The stand is anchored or vacuum-mounted so the barrel runs true, and ring-sealed on finished floors so water goes into the vac and nowhere else.
-
04
Core out, hole clean
The core comes out in one piece, the hole gets cleaned, and the plumber or sparky behind us can sleeve straight into it.
What it costs
What moves
the price
Coring is priced per hole, by diameter and depth, with the count mattering more than anything. Ten holes on one visit costs far less each than one hole on ten visits. Heavy reinforcement slows the bit and costs more; overhead coring takes longer than floor coring; and a hole that needs scanning first carries that cost too. Access and floor level change the price the same way they do on any cutting job.
Get a free quoteHave this ready when you call
- How many holes, and the diameter of each
- What thickness you are going through
- Wall, floor or ceiling — and whether it is overhead
- Whether the slab is post-tensioned, if you know
- Water and power availability
- Hydraulic or services drawings if there are any
None of it is essential — we can work it out on the phone. It just gets you a firm price faster.
Where we work
Core drilling across Sydney
Based in Sydney and on the road daily, with the Eastern Suburbs a home patch — and the rest of Sydney a short drive.
Eastern Suburbs
- Bondi
- Bondi Junction
- Randwick
- Coogee
- Maroubra
- Clovelly
- Bronte
- Waverley
- Paddington
- Woollahra
- Double Bay
- Rose Bay
- Vaucluse
- Dover Heights
- Kensington
- Kingsford
- Mascot
- Surry Hills
… and the rest of Sydney
- Sydney CBD
- Inner West
- North Shore
- Northern Beaches
- Hills District
- Parramatta
- Western Sydney
- Liverpool
- Sutherland Shire
- Blacktown
- Penrith
- Campbelltown
- Central Coast
- Wollongong
- Blue Mountains
Questions
Core drilling, answered
What size holes can you core?
Anywhere from 20mm up to 600mm. If you need something bigger than that, it usually becomes a saw cut rather than a core, and we can do that too — call and we will tell you which way is cheaper.
Can you core through reinforced concrete?
Yes. Diamond core bits cut straight through rebar. If the slab is heavily reinforced or post-tensioned, tell us before we start — post-tensioned slabs need scanning first, and we will not core one blind.
Will water go everywhere?
No. Wet coring uses a small amount of water that gets vacuumed straight back up, and we ring-seal the drill on finished floors. On sites where water is a problem we core dry with extraction instead.
Can you core in an apartment or strata building?
Yes, and we do it often. Bring us the building rules and booked times and we will work to them — we are insured, and SWMS go to the building manager on request.
Also on the truck