Garage floors take abuse no other interior slab sees: vehicle loads, road salt dripping off the car all winter, oil, jack stands, and temperature swings. We replace failed garage slabs, repair cracks and pitting, and install coating systems that seal the surface against salt and stains.
A garage floor project is also the moment to fix slope and drainage so meltwater runs out the door instead of pooling under the car.
What you get
Garage slabs done right, from base to finish
A garage floor carries point loads no patio ever sees: jack stands, trailer tongues, tool chests on casters. We pour replacement garage slabs at 4 to 5 inches with reinforcement on chairs, over compacted base, with a vapor barrier where the garage will be finished or conditioned. The floor gets a steel-trowel finish, pitched toward the door or a drain so snowmelt leaves on its own.
Old Lawrence garages often hide the real problem under the slab: builders in past decades poured over loose fill, and forty years of settling leaves a cracked, stair-stepped floor. Tear-out and re-pour fixes the cause. We also saw-cut and replace partial sections when only one bay has failed.
Aprons take the worst freeze-thaw abuse on the property because they live in sun, shade, salt, and tire load all at once. We replace aprons with air-entrained mix and isolation joints at the slab and the drive, which is the combination that stops the corner-cracking you see all over town.
Coatings: epoxy, polyaspartic, and what actually holds up
A coating is only as good as the prep. We diamond-grind the slab to open the surface, repair cracks and pits, and test for moisture before anything goes down. Coatings applied over sealed or dusty concrete peel within a year, which is where most DIY epoxy kits end up.
For Kansas garages we lean polyaspartic over traditional epoxy: it tolerates temperature swings better, does not amber in sunlight at the door, and returns the garage to service in a day or two instead of a week. Full-flake systems hide dirt and give real slip resistance.
Installed coating systems typically run $5 to $9 per square foot depending on repair work and the system spec. Pair a coating with a sound slab and you get a floor that wipes clean, shrugs off road salt, and makes a two-car garage feel like part of the house.
Detached garages, shops, and the slab questions that come with them
Lawrence alleys are lined with detached garages from the 20s through the 60s, and most sit on slabs that were never reinforced and have spent decades heaving. We replace those floors with modern specs, and where the structure allows, we correct door threshold heights and add the apron the original never had.
Garage-to-shop conversions change the slab requirements: a welding bay wants different surface protection than a woodshop, a car lift wants thickened footings at the posts, and a conditioned shop wants a vapor barrier and insulation board under the new slab. Tell us the end use and we pour for it.
We also flat-out tell you when a floor does not need replacement. Plenty of cracked garage floors are stable and serve fine under a repair-and-coat package at a third of replacement cost. The estimate gives you both numbers and our honest read.
Garage floors that survive Kansas winters
The slow killer of garage floors in Lawrence is winter brine. Every drive on treated roads coats the underside of your car in salt solution, and it drips onto the slab all night, every night, from December through March. Salt-saturated meltwater penetrates bare concrete, and freeze cycles and chemical attack pit the surface. By year ten, many local garage floors look sandblasted along the tire lines. Sealing or coating the slab breaks that cycle completely.
Older Lawrence homes add a structural angle. Garage slabs from earlier eras were often poured thin, without reinforcement, on minimal base. When those slabs crack and settle, coatings cannot save them, and the right move is replacement: tear out, recompact, and pour a reinforced slab at proper thickness with slope to the door. We tell you honestly which side of that line your floor is on, because coating a failed slab wastes your money.
For newer homes and shops, coatings are where the value is. Polyaspartic systems install in a day, handle hot tire pickup that defeats cheap epoxy kits, and wipe clean of oil and salt. We prep by grinding, not acid etching, because coating adhesion lives or dies on prep. We also do a steady business in detached shop and outbuilding slabs around Douglas County, poured thicker for lifts and equipment. Tell us how you use the space and we will spec the floor for it.
Where we do this work
We provide garage floors across Lawrence and Douglas County:
Garage Floors: common questions
Should I repair, coat, or replace my garage floor?
Sound slab with surface damage: repair and coat. Structurally failed slab with wide cracks or settling: replace. We inspect and give you the honest category with pricing for the right option.
What coating holds up best?
Professional polyaspartic and high-solids epoxy systems with ground prep. Box-store kits fail from hot tire pickup because the prep and material are not equivalent. Ours carry a workmanship warranty.
How thick should a garage slab be?
Four inches reinforced is standard for residential vehicles. Going to five or six inches with rebar is cheap insurance if you run a lift, heavy truck, or equipment.
How long until I can park on a new floor?
Coatings: usually 24 to 48 hours. New slabs: seven days for vehicles. We give exact timing with the schedule so you can plan parking.