Concrete Contractors in St. Louis and St. Charles Missouri. A & S Hardscapes Has Consistently Installed High Quality Concrete Driveways, Concrete Patios, And Concrete Retaining Walls For Over 20 Years. When it comes to the overall look of your property, a driveway makes all the difference. Worn, cracked, or uneven driveways are not only an eyesore but an annoyance to drive on. You deserve the best, at the most affordable price. That's what A&S Hardscapes offers. So the next time you pull into your driveway, it should be with a satisfied smile and a smooth ride.