Concrete core drilling with the GPR scan built in. We locate the rebar, post-tension cables, and conduit hiding in the slab first, then core clean, exact holes for plumbing, electrical, HVAC, drains, and anchors: one crew, one visit. Serving all of Washington from Seattle and the Orlando metro in Central Florida, typically next-day.
A clean, exact hole: in exactly the right place.
How it works
The rig anchors to the surface, and a diamond-tipped core barrel cuts a smooth cylinder through concrete, rebar, brick, or block. Any diameter the penetration calls for, from a small anchor hole to a large mechanical opening. Most work is wet-cored: water cools the bit and holds the dust down, and the slurry leaves with us, not down your drain.
Why the scan matters
Slabs hide things: rebar, electrical conduit, radiant heat, and in elevated decks, post-tension cables under thousands of pounds of load. Cut one and a clean hole becomes a structural repair or a life-safety incident. Our concrete scanning crew maps the exact core footprint first, so every hole goes where the slab says it can.
Most outfits core blind. We never do.
Core drilling and concrete scanning are usually two different companies: a scanning sub one day, a coring crew another, and a gamble whenever the schedule squeezes the scan out. RainierGPR is a GPR company that cores: the same crew scans every core location and drills it, in the same visit.
Core blind, or wait on a sub
Scan and core: one crew, one visit
Every penetration a building needs.
From a one-inch anchor hole to a large mechanical opening: slab-on-grade, elevated deck, wall, or column, cored exactly where the trade needs it.
Slab-on-grade or elevated deck changes what we scan for. Under a ground slab the risk is buried utilities (we locate those too); in an elevated deck it’s post-tension cables and conduit. Either way, the scan comes first.
Scan. Core. Clean.
We scan
Every core location gets a GPR scan before the rig comes off the truck. Rebar, post-tension cables, conduit, and radiant heat get marked on the surface, and the layout is confirmed with you. Moved an inch or two if the slab says so.
We core
The rig anchors, and a diamond core barrel cuts a clean, exact cylinder, the diameter the trade specified, plumb and on layout. Wet coring keeps dust out of the air and the slurry contained, even in occupied buildings.
We clean
Cores come out, slurry gets vacuumed, and the area is left broom-clean and ready for the next trade. You get the scan record and the documentation for the GC, the engineer, and the permit file.
Cores from the field, not stock photos.
Chalked layouts, marked cables, and clean penetrations from real core drilling jobs. Every photo on this page is documented RainierGPR work, our crews, not a stock library.
Plumbing riser cores
Drain & flange penetrations
A 5.0-star crew, in their words.
Matthew & Sam did an outstanding job doing an x-ray analysis and core drilling at a multi-family parking garage. They explained the scope of work thoroughly, executed the job efficiently, and operated with the utmost professionalism. The business owner, Tony, was easy to work with, very responsive, and reasonably priced. I highly recommend Rainer GPR!
Matthew and Sam came out and did a wonderful job, clean, concise and very knowledgeable on what needed to be complete. I use Rainier for all my scanning and coring needs
Rainier GPR were great to work with! I was in a bind needing concrete scanned and cored they came out on time, clean , safe, and timely. Will definitely use their services from now on!
Straight talk on price.
A scanned core costs barely more than a blind one, and nothing like what a severed post-tension cable costs. We quote every job before we roll a truck, scan included, and one avoided strike pays for the whole visit many times over.
Ranges are typical, not a quote. Tell us the count, the diameters, and the deck type and we’ll give you a real number, usually the same day.
Two markets, one standard.
How wide, how deep: and why we core wet
Concrete core drilling covers more range than most people expect. Typical cores run from about one inch to twelve-plus inches in diameter (small enough for an anchor bolt, big enough for a duct) and with barrel extensions we core through thick structural pours, footings, and walls. Most work is wet-cored: water cools the diamond bit, keeps silica dust out of the air, and turns the cuttings into a slurry we contain and remove. Where water can’t go (finished interiors, live electrical rooms) dry coring with HEPA dust extraction does the job instead.
What separates one coring outfit from another isn’t the hole, a sharp bit cuts a round hole for anybody. It’s what happens before. In Seattle’s mid-rise decks and Orlando’s post-tensioned condos alike, the slab is full of things that must not be cut, and the record drawings rarely tell the whole story. Our crews have been cutting and coring concrete for over two decades, and every one of those cores starts the same way: ground penetrating radar over the exact core location, the findings marked on the surface, and the hole moved if the slab says to move it. That’s the whole reason RainierGPR cores, the scan and the core belong to the same crew.
Coring soon? Call WA (360) 584-0401 · FL (407) 493-3525, or read the answers below.
Core drilling, answered straight.
Scan it. Core it. Move on.
Send us the core count, the diameters, and the deck type: we’ll quote it same day, scan included, and have a crew on site as soon as next-day.
