Lombard Epoxy Flooring brings more than 20 years of slab work to epoxy flooring in Warrenville, and a good share of that work starts with a question about what the concrete is actually doing. A basement slab, a home garage and an elevated parking deck can all look like gray concrete, yet they fail for different reasons and need different products. We size the system to the slab, not the other way around.
Before a price is final, our written scope includes a moisture test, a map of every crack, spall and old coating, and a plain statement if the slab should be repaired or replaced before anyone coats it. The proposal then names the product line, the coat count and the finished thickness, so you can hold the finished floor up against the quote. Preparation is mechanical: a diamond grinder or a shot blaster opens the surface to a real profile, and we never acid etch.
This page covers one floor type that people often lump in with garage epoxy and should not: the coated deck of a multi-level parking structure. It also explains where that kind of work stops and your own garage floor begins.
A Garage Deck With a Heliport on Top, in Cantera
Cantera is where Warrenville’s commercial market is concentrated: corporate offices, three hotels, a 100,000-square-foot fitness club and restaurants in one development, which has been the city’s largest employer since it went up in the late 1980s. One of its buildings is the five-story, 153,000-square-foot office McShane Construction design-built as the headquarters of Exelon Nuclear, in precast concrete and reflective glass. McShane’s project pages say the job included an attached 200-car structured parking garage featuring Warrenville’s first heliport.
The Cornerstone Heliport Record
The FAA lists a private-use helicopter landing site called Cornerstone Heliport, identifier 72IL, with its owner and manager at 4201 Winfield Road and one concrete helipad measuring 60 by 44 feet. Its published position falls inside Warrenville city limits, in Naperville Township. Neither the FAA nor McShane ties the two records together in so many words, so the link between the pad and that garage is a reasonable reading of the shared Cornerstone and Winfield Road names rather than a documented fact.
A Deck, Not a Slab on the Ground
For a floor coating, the helipad matters less than what sits under it. A structured garage deck is a suspended concrete structure with reinforcing steel inside and open space or another parking level below, not a slab resting on soil. Cars that pull in during winter carry salty meltwater up the ramps, and on a deck that water has somewhere to go: down through cracks toward the steel. We have not inspected the Cantera garage and do not know how its deck is built or coated; it is simply the clearest local example of a floor that calls for a different conversation.
Looking for epoxy-flooring closer to River Grove? See River Grove Epoxy-Flooring.
Why a Parking Deck Is a Structure to Protect, Not a Floor to Decorate
Writing in Construction Canada, engineer David Uren put the purpose bluntly: the basic function of a garage traffic topping is to protect the underlying structure from water. De-icing chemicals are a particular enemy of the reinforcing steel in the concrete, because once chloride reaches the bars they corrode, expand and crack the concrete around them. That is a structural problem first and a floor-finish problem a distant second.
What a Traffic Coating Is For
A traffic coating, sometimes called a traffic topping or traffic membrane, is built to keep chloride-laden water out of cracks and off the steel. The thin systems Uren describes are elastomeric, mostly urethane-based, and under 2 mm (80 mils) thick overall, and their flexibility lets them bridge minor cracks that a rigid coating would simply crack along with. He also notes their limit: they do less well on wider or moving cracks.
A decorative garage epoxy is a different product made for a different job. A rigid, glossy flake floor designed for a slab on the ground is about appearance, cleanability and wear on a surface that does not flex the way a suspended deck can, and it is not a membrane over a structure. Putting one on a parking deck because it looks finished would be choosing the wrong tool.
On a deck, a crack that reopens through a rigid coating is the path the salt water was looking for. The membrane’s whole value lies in staying continuous as the concrete moves with temperature and load, which is why the product is elastomeric rather than hard.
Thicker Where the Cars Turn
Traffic membranes wear unevenly, and a proper layout accounts for it. Uren writes that thin systems wear sooner in high-traffic drive aisles, ramps and sharp turns, so the wear course in those areas goes on at double or triple the thickness used in the parking stalls. With that kind of detailing and regular maintenance, he says both thin and thick systems can last for more than 25 years.
Plows, Pressure Washers and Solvents: What the Maker Says to Avoid
Pecora, a traffic-coating manufacturer, publishes a maintenance routine for its systems that reads more like a schedule for a roof than for a floor. The routine is worth knowing even if you never own a parking structure, because it shows how much of a coating’s life is decided after the crew leaves.
Snow Removal Without Metal Blades
The maker’s guidance is that metal blades should be avoided at all times, to prevent physical damage to the coating system, and Uren separately warns that regular plowing can damage a thin elastomeric system. Pecora adds a structural point: piled snow can load a deck beyond its design load capacity. Where the snow goes matters as much as what pushes it.
Washing Pressure and Cleaners
Pecora calls for weekly sweeping or vacuuming and a monthly deep clean, either by power scrubbing with a low-suds, biodegradable detergent or by a water blast no greater than 1,000 psi at the nozzle. It also says to avoid strong solvents, especially hydrocarbon types. Scrubbing, not solvent, is the default for a coated deck.
Inspections and Patching on a Schedule
The routine includes a monthly look for excessive wear or physical damage and a semi-annual inspection covering joint sealant, drains and high-wear areas. Repairs remove damaged coating back to well-adhered material and rebuild it to the original film thickness, with the topcoat and striping replaced periodically. Pecora also says major repairs should be done by the original approved applicator, which makes the original install records worth keeping.
Where Our Work Fits on a Commercial Campus
Office, fitness, hotel and restaurant floors at a development like Cantera are a better match for what we do than the deck membrane itself. Those interior floors get the same mapping, moisture testing and mechanical prep as a home slab, and we phase the work around operating hours with overnight and weekend windows when a space cannot close.
A ground-level service corridor, a loading area or a back-of-house kitchen usually sits on grade and is ordinary coating territory. An elevated deck that needs a new traffic membrane, crack repair or concrete work belongs with the owner’s engineer and a deck specialist, and we will say so rather than quote a floor system for it.
Your Attached Garage at Home Is a Different Job
A home garage in Warrenville is usually a slab on the ground, and the coating on it is doing a different job from a deck membrane. Nothing is hanging under it, and no one should describe a garage floor coating as structural protection or waterproofing. What it should do is grip the concrete, resist hot tire pickup and the brine that rides in on tires, clean up easily and last.
What the Housing Stock Tells Us
Warrenville’s most common construction decade is the 1970s, with 1,650 housing units, and 62.1 percent were built between 1970 and 1999. A builder-grade slab or a failed coating 30 to 55 years old is a common starting point, and slabs from those decades predate ASTM E1745, the 1997 standard for under-slab vapor retarders. We cannot assume one is down there, so the test result, not a guess, decides whether the system needs a moisture-mitigation primer.
Newer homes are part of the picture too. The June 2024 special census counted 15,195 residents and 6,764 housing units, and the city says the 2020 count missed newer developments including Everton, Lexington Trace, Arden, Westlyn and Riverview West. A slab only a few years old still gets the same moisture reading, because young concrete can hold plenty of water.
Basements get one more check. We read a basement floor for signs of past water before anything else, because a coating does not stop seepage, a backup or a sump that cannot keep up, and hydrostatic pressure under a slab can push a coating off from below.
Attached Homes, Permits and Paperwork
In a row of attached homes, a garage bay often shares a wall, and sometimes a slab edge, with the neighbor, and an association may set rules for contractor access and work hours. The City of Warrenville Community Development Department lists flooring among the work that does not need a building permit, so a home garage coating is normally an association question rather than a city one. Check with your association before we put a date on the calendar.
On our side of the paperwork, a home job over the state threshold gets a written contract and the Illinois Home Repair: Know Your Consumer Rights pamphlet before any grinding starts. The proposal also spells out what the coating warranty excludes, and moisture vapor transmission is the first exclusion we name.
Timing a Garage Job Around Winter
Cure schedules follow slab temperature and the dew point spread at the surface, not the calendar. An unheated garage in deep winter is told to wait, because a coating laid on cold, damp concrete risks amine blush and a weak bond. Grinding dust is captured at the machine with a vacuum rather than rinsed away with a hose.
For a garage that takes salt all winter, we steer toward a system built for it, such as a 100% solids epoxy base with a polyaspartic topcoat and a broadcast chosen for grip, and the slip-resistant texture is specified by that broadcast and topcoat rather than promised. The difference from a Cantera deck is the point of this page: your slab needs a durable floor, while a suspended deck needs a membrane and an engineer.
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