If you're planning a project that involves cutting through concrete or masonry, you've probably run into both terms: wall sawing and core drilling. They get lumped together because they're both precision concrete-cutting methods, but they're not interchangeable. Using the wrong one on a bid means delays, extra cost, or a contractor who has to bring in a second crew to finish the job right.
Here's the difference, in plain terms, from a crew that's been cutting concrete in the Denver metro for 46 years.
What Wall Sawing Does
Wall sawing uses a track-mounted circular saw to cut straight, flat openings in vertical or horizontal concrete surfaces — walls, floors, ceilings, bridge decks. The saw runs on a guide track, which is what makes the cut so clean and square. It's the go-to method any time a project needs:
- A doorway, window, or vent opening cut into an existing concrete or block wall
- A straight-edged opening for a new HVAC duct, utility penetration, or elevator shaft
- A clean, structurally controlled cut where the edges matter as much as the hole itself
Because the saw is track-guided, wall sawing holds tight tolerances on depth and angle, which matters on load-bearing walls where an uncontrolled cut can compromise the structure around the opening.
What Core Drilling Does
Core drilling uses a hollow, diamond-tipped bit to bore a round hole straight through concrete, block, or masonry. Instead of a straight edge, you get a clean circular penetration — which is exactly what most utility and mechanical work actually needs. Core drilling is the right call for:
- Plumbing, electrical, or HVAC penetrations through slabs, walls, or footings
- Anchor bolt holes for structural or mechanical installations
- Sampling or testing holes where a contractor needs to see what's inside a slab
- Tight-access spots where a track saw simply won't fit
Core drilling can go in almost any direction — horizontal, vertical, or overhead — and diameters typically range from about an inch up to well over a foot, depending on the bit.
So Which One Do You Need?
The short version: if the job calls for a straight-edged opening — a doorway, window, or duct chase — that's wall sawing. If the job calls for a round penetration for pipe, conduit, or an anchor — that's core drilling. Some projects need both: a wall saw for the main opening and a core drill for the smaller utility penetrations around it.
The other factor is access and structure. Tight mechanical rooms, low-clearance crawl spaces, and overhead work often rule out a track saw entirely, which makes core drilling the practical choice even on a job that could technically go either way.
Why This Matters On A Bid
General contractors and subs sometimes spec the wrong cutting method on a plan, especially when the drawing shows a shape without specifying how it should be cut. Catching that before the crew shows up — not after — is the difference between a job that finishes on schedule and one that needs a second mobilization. A concrete sawing contractor who's seen both methods used (and misused) on hundreds of jobs can usually flag the mismatch from the plans alone.
Spitellie Concrete Sawing Does Both
Spitellie Concrete Sawing has been a family-run concrete sawing and core drilling company based in Wheat Ridge for 46 years, serving commercial, utility, and residential customers across the Denver metro. We run slab sawing, electric sawing, wall sawing, hand sawing, and core drilling — so whichever method your project actually needs, it's one call, not two contractors.