Concrete Flat / Slab Sawing in Seattle, Tacoma & Western Washington
Slabs, floors and pavement cut to exact depth: trenches, openings, expansion joints and whole slab sections sawed clean with walk-behind saws, for commercial and residential projects of every size.
30 reviews, every one five stars
Family-owned since 1999
WA Lic. SILERCC804RT · USDOT 3663541
Licensed & insured · 24/7 availability
What Is Concrete Flat / Slab Sawing?
Concrete flat sawing (also called slab sawing) uses a walk-behind saw with a diamond blade to cut horizontal surfaces: floors, slabs, foundations and pavement. It’s the workhorse of concrete cutting, the method behind trenches for new plumbing, openings in warehouse floors, expansion joints in fresh pours and clean removal lines in driveways and roads.
Every cut follows a meticulous process. We evaluate the slab first to match the right saw and blade to its thickness and reinforcement, run water to the blade, confirm your marked lines and make relief cuts before the main cut, often in multiple passes to reach full depth. Then the concrete is broken away and removed, the area cleaned, and the cut inspected for quality.
Slab sawing is the same service by another name: the term contractors use when the job is cutting through or removing a structural slab. The saw scores a straight, full-depth line that turns one immovable mass of concrete into clean sections that can be lifted out, trenched through or left as a finished edge: warehouse floors, garage and basement slabs, and suspended slabs sectioned for controlled removal. We’ve cut and removed suspended slabs 18 to 20 inches thick.
Compared to jackhammering, flat sawing produces very little vibration, dust and noise, so the surrounding structure and the people in it are barely disturbed. It’s also the cost-effective option: precise cuts mean no collateral damage to repair and no oversized patch to pour back.
The result is a precise, customized cut of any size or shape, tailored to your exact specifications, and a safer site while it happens. Protective equipment, operator training and stability checks on the cut concrete and surrounding structure are standard on every job, with traffic control and pedestrian barriers implemented whenever the work meets a street or sidewalk.
Flat sawing anchors our concrete cutting services, and Siler’s has been sawing slabs across Seattle, Tacoma and Western Washington since 1999, for homeowners, general contractors, industrial and government customers alike.
Want the deep dive? Read our guide: Concrete Flat Sawing: Essential Guide for Efficiency and Precision.

Why Contractors & Homeowners Choose Siler’s
Family-owned and operated since 1999.
Every one of our 30 reviews is five stars.
WA SILERCC804RT · USDOT 3663541
Nights, weekends and tight pour schedules.
What Flat Sawing Is Used For
If the concrete is under your feet and it needs a precise cut, a flat saw is the tool. These are the flat sawing calls we take most often across the Seattle-Tacoma area:
Plumbing & Utility Trenches
Straight, clean trench cuts through interior slabs and exterior flatwork so plumbers and electricians can run new lines, cut, removed and ready for the trades.
Roadway & Highway Cutting
Full-depth cuts in roads, highways and municipal pavement, from utility crossings to road expansion work, with traffic control and barriers implemented as needed.
Warehouse & Factory Floors
Openings, trenches and machine-pit cuts in industrial slabs, including zero-emission electric and hydraulic saws for enclosed, limited-ventilation spaces.
Slab Section Removal
Warehouse, garage and basement slabs cut into liftable sections for removal, clean edges, no collateral cracking, and our own trucks to haul them off.
Foundation & Slab Openings
Openings cut through floors and foundation slabs for stairways, sump pits, ejector pits and structural access, cut to your marked lines, to spec.
Suspended Slab Cutting
Elevated and suspended slabs sectioned for controlled removal, plus stair, shaft and access openings cut to spec through structural slabs.
The Right Saw for Every Slab
Our crews operate diesel, electric and hydraulic flat saws, matched to each job. Diesel saws bring the power for heavy-duty cutting up to 30 inches deep; our zero-emission electric saws cut up to 24 inches and are designed for indoor and limited-ventilation areas where diesel exhaust is a concern; hydraulic saws cut up to 12 inches.
Flat saws cut straight up and down, and they aren’t only for straight lines. We cut expansion joints and separations, some radius cuts for pipes and drains, and full slab cuts that take an entire floor or foundation apart in controlled sections.
Every project gets water on the blade to keep dust down, barricades and clearly marked cut areas, operators in proper protective equipment, and a thorough cleanup with debris hauled away. The site is left clean and ready for the next phase of your project.
Cutting a wall instead of a floor? That’s wall sawing. Round penetrations call for core drilling, and sections beyond blade depth go to the wire saw.
Flat Sawing at a Glance
Diesel saws cut up to 30 inches deep
Zero-emission electric saws up to 24 inches, indoor-safe
Hydraulic saws up to 12 inches
Straight cuts, some radius cuts and full-slab cuts
Suspended slabs sectioned and removed
Water-cooled blades keep dust down; debris hauled off
Licensed & insured, WA Lic. SILERCC804RT
The Flat Sawing Contractor Washington GCs Call Back
Flat sawing is where our crews spend most of their days: tenant improvements, municipal road work, warehouse modifications and new construction across Western Washington. GCs and project managers bring us back because the lines land where the drawings say, downtime stays minimal, and the site stays safe and clean while we cut.
We sequence cuts around other trades and work occupied buildings, live roadways and after-hours windows. And when a job pairs sawing with removal, excavation or pour-back, one call covers the full scope. Recent flat sawing projects:

Kirkland Road Expansion
Road sawing on Juanita Blvd in Kirkland for a road expansion, including old road sections that ran 16 inches-plus thick.

Ice Cream Shop TI Project
Interior trench cutting and concrete extraction with hydraulic slab saws to accommodate new plumbing installations.

Rivian Automotive Facility in Renton
Slab sawing and removing a section of warehouse slab at the new Rivian Automotive facility in Renton.
Have a Job Like These?
Send us the plans or talk to the crew directly. Free estimates, 24/7 availability, one crew from first cut to haul-off.
5.0 on Google From 30 Reviews
Real reviews from Western Washington homeowners and general contractors.
“Jose and Daniel did a number of concrete cuts for us. Prompt, efficient and well done.”
Robert K.
Five-Star Google Review
“Very professional, amazing work, showed up on time and worked efficiently- will be calling these guys again”
Cailin B.
Five-Star Google Review
“they got there very quickly ! service was amazing highly recommend!!!”
Miranda V.
Five-Star Google Review
How Flat / Slab Sawing Works with Siler’s
A cut-only contractor leaves the break-out and the haul-off to somebody else. Siler’s cuts to your marked lines, breaks out the sections and hauls them off with one crew, so nothing falls between subs.
Free Estimate
Call (206) 901-9383 or send us the cut lengths, slab thickness and site details. We quote flat sawing fast. And with 24/7 availability we work around your schedule.
Evaluate & Mark
We match the saw and blade to your slab, set up water and barricades, confirm your marked lines and, when utilities might be below and the owner wants it, arrange GPR scanning before we cut.
Cut to Depth
Relief cuts first, then the main cut, multiple passes to full depth, with noise, dust and vibration kept to a minimum the whole way.
Break Out & Haul Off
Cut sections are broken away and hauled off in our own trucks through our concrete breaking & disposal service. And when the trench needs closing, the same crew handles the trench pour-back.
Sound Familiar?
✕ An opening that’s out of square, so the frame or the duct doesn’t fit.
✕ A second sub to schedule for haul-off, and a third for the pour-back.
We built our process to take every one of these off your plate. One call. One crew. One line on your schedule.
Concrete Flat / Slab Sawing Questions, Answered
Flat / Slab Sawing Across Seattle, Tacoma & Western Washington
Our flat saw crews dispatch across the Puget Sound region every day, from municipal roadways and warehouse floors to driveways and basement slabs in between, with the same saws and the same standards on every slab.
Need Precision Flat or Slab Sawing?
Get a free estimate today. Tell us about the job or talk to the crew directly.

