Epoxy Flooring in St. Louis, MO

Epoxy flooring in St. Louis has to survive two very different seasons in the same garage. Wikipedia lists a January mean daily low of 23.8 F and about 16.6 inches of snow a year, so cars come home every winter carrying slush and road salt. Then summer flips it: the July mean daily high is 89.6 F and the average July dew point is 66.6 F, which is sticky air that matters a great deal to a curing resin. We design each floor around both seasons, and around the age and condition of the slab under it.

Salt, slush and the tire path

MoDOT says the St. Louis region maintains 6,400 lane miles of state roads with more than 200 trucks fitted with salt brine and rock salt spreaders, and the agency reports over 30,000 tons of salt on hand. That salt does its job on the highway, then drips off your wheel wells onto the garage floor. On bare concrete, salty meltwater soaks into the surface, and repeated freezing and thawing can flake the top layer away. With a sealed epoxy floor coating, the brine stays on the surface and a squeegee pushes it outside. We favor flake broadcast floors and slip-resistant topcoats in garages here, because a wet, glossy floor in January is a hazard.

Muggy air, cold slabs and the dew point

Wikipedia puts average relative humidity at 69.7%, peaking in December at 75.8%. When the slab is colder than the dew point, water condenses on the concrete, and a coating rolled over that film can blush, cloud or lose its bond between coats. Before each coat we measure air temperature, humidity, dew point and slab temperature. On a steamy August morning that may mean closing the garage and starting later. In late fall it can mean waiting for the slab to warm up. If the readings are off, we reschedule rather than gamble with your floor.

Older concrete, older houses

Point2Homes, summarizing American Community Survey data, reports that over half of the city of St. Louis's housing dates from 1939 or before, and the median home went up in 1938. Inner-ring suburbs such as Affton, Florissant and Webster Groves are largely 1940s through 1960s housing, while O'Fallon and Wentzville in St. Charles County are mostly 1990s and newer. Old slabs often carry decades of paint, sealer, oil and patchwork. Some were poured without a vapor barrier underneath. Every floor gets diamond ground until we reach solid concrete, then cracks and spalls are filled and the slab is moisture tested before we recommend a system. That prep is most of what decides how long a coating lasts.

Ground, rivers and basements

The area sits on limestone and dolomite, and Wikipedia notes karst ground with sinkholes south of downtown St. Louis. The rivers have their own history: the Great Flood of 1993 put Chesterfield Valley under at least 10 feet of water, and the Meramec reached a record crest at Arnold in December 2015. Where a home has a basement, that slab sits in the ground year round. We test basement floors for moisture vapor and use a moisture-tolerant primer when the numbers call for it. When a basement takes on liquid water, we tell you that the water problem needs fixing first.

Choosing a system

Standard epoxy builds a thick, hard film and costs less per foot. Polyaspartic cures much faster and resists UV, which helps on the strip of floor inside a garage door that faces west. Flake floors hide salt spotting and add texture. Metallic epoxy turns the floor of a finished basement or a display area into a decorative surface. Commercial floors in warehouses, auto shops, breweries and food plants usually need 100% solids systems, sometimes with a urethane topcoat. We explain the tradeoffs on site and write the system we recommend into your quote. Get a free estimate

What epoxy flooring costs here

On epoxy flooring cost, HomeGuide gives a national installed range of $4 to $10 a square foot, which works out to roughly $1,600 to $5,800 in a two-car garage. For polyaspartic, its figure is $5 to $12 a square foot. Old coatings that must come off, heavy crack repair and decorative finishes push a floor toward the top of those ranges. We price each floor only after measuring and testing it, and the price on your written estimate is what you are billed.

Questions to ask epoxy flooring contractors

Whoever you hire, ask how they prepare the concrete (diamond grinding or acid etching), whether they test for moisture before quoting, what topcoat goes on the sunny strip by the door, how they handle salt and slip resistance, and when you can park again. Good epoxy flooring companies and epoxy floor installers should answer each of those in writing. We put all of it in our quote so you can compare it side by side with anyone else's.

We work in the city of St. Louis and across St. Louis County, including Clayton, Ladue, Kirkwood, Webster Groves, Brentwood, Maplewood, Richmond Heights, University City, Creve Coeur, Chesterfield, Ballwin, Town and Country, Des Peres, Manchester, Florissant, Hazelwood, Maryland Heights, Affton and Mehlville. South of the Meramec we cover Arnold and Fenton, and across the Missouri River we work in St. Charles, O'Fallon and Wentzville. The floors change as you move outward. City homes and older suburbs often have small detached or tuck-under garages and basements with old, painted slabs. The 1950s through 1970s ranch neighborhoods tend to have attached garages with decades of salt wear. Newer St. Charles County subdivisions have larger garages with younger concrete that still needs full grinding. Low ground near the Missouri, Meramec and River des Peres calls for extra care with moisture. Open any town page for the local housing and slab details we have gathered.