Wall Sawing vs Core Cutting: Which One You Need

Core cutting and wall sawing both use diamond and water. They are not interchangeable. One makes a round hole. The other makes a straight cut. Picking the wrong one is how a door opening turns into a week of making good.

Core cutting is for round penetrations

A core drill spins a barrel and leaves a cylinder. That suits pipes, conduits, anchors and test cores. The edge is circular, so a rectangular frame will not sit in it. Diameters follow the service: small electrical sleeves, larger drainage, and occasional large openings that are really a stitch of many cores.

Book core drilling when the drawing shows a diameter. If the drawing shows a width and a height, you are no longer in core-drill territory.

Wall sawing is for straight openings

A wall saw runs on a track bolted to the concrete and cuts a straight, plumb line. Doors, windows, HVAC risers and lift-door openings want that edge so the frame sits without a thick pack of mortar. The cut can be full depth in stages, and the piece can be lowered rather than broken in place.

The track needs a sound face to fix to, water, and room for the blade. If the wall is freestanding, badly cracked, or covered in a finish you cannot fix through, say so before the crew arrives.

A simple way to choose

• Round sleeve, pipe or anchor: core drill
• Door, window, AC duct or lift opening: wall saw
• Square opening where a track cannot be mounted: stitch drilling, then making good
• Section too thick or too awkward for a track saw: wire saw

The stitch-drilling case is common in plant rooms. It is explained in stitch drilling versus a wall saw. Very thick beams are covered in wire sawing versus a wall saw.

What changes the programme

A handful of 100 mm cores is often a short visit. A structural door opening needs set-out, track fixing, a cut sequence, and a plan for the lump of concrete that comes out. On a live floor that lump cannot drop. Night work is normal when the opening is in an occupied building.

Mark the opening on the wall, confirm it with the frame size, and check whether the engineer has accepted the cut. Then send the photo. Door and duct openings are spelled out in the openings guide.

If you are unsure which crew to book, send the drawing to the quote desk. The method should be named in the reply, not left as “cutting”.

Common questions

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