Sub Base Types — Family-owned, 4.9★ rated, 15-year warranty
Here's the thing about Kennesaw sport courts—most homeowners we talk to in Legacy Park, Stilesboro, and Due West are thinking about their kids' basketball games or a place to practice tennis without driving all the way to Town Center at Cobb. The reality is, building a proper sport court starts underground, not on top. We're locals here in Kennesaw, and we've installed enough courts to know that the red clay soil in Cobb County demands a specific sub-base approach if you want your court to last. That heavy clay doesn't drain like sandy soil in other parts of Georgia. It compacts, it shifts with humidity swings, and if you skip the foundation work, you'll be looking at cracking asphalt and uneven surfaces within a couple of seasons. A sport court is only as good as what's holding it up. We've built courts for families near Kennesaw Mountain and across town, and the ones that perform year after year share one thing: they started with the right sub-base. Whether you're dreaming of a residential court for weekend games or you need something that can handle serious play, let's talk about the foundation that'll make it real.
Kennesaw's Cobb County red clay is beautiful until you're trying to build on it. This soil holds water—especially during Georgia's humid summers when temperatures routinely hit 90 degrees or higher for three months straight. That moisture and heat cycle means your sub-base has to breathe and shift without cracking the court surface above it. We typically recommend a four-to-six-inch engineered stone base, depending on your lot's drainage patterns. If your property is in Due West or near the lower elevations around Legacy Park, we'll often add a perimeter drain system because runoff from those Georgia clay slopes moves fast and pools in low spots. Shade matters too. Courts on the north side of homes get less UV stress, which extends asphalt life, but they also stay damp longer in spring—another reason a solid base beats cutting corners. Most Kennesaw residential lots are large enough for a half court or full court without major grading, but we've seen HOA landscapes in some neighborhoods require specific edging or sight lines. We'll walk your property and account for how water naturally flows, where your neighbors' drainage hits, and what the clay's doing seasonally. That's how we size and slope your sub-base right the first time.
Cobb County's red clay is dense and hydrophobic—it repels water instead of absorbing it. In Georgia's heat and humidity, that clay expands and contracts, putting stress on asphalt. A proper sub-base with drainage and engineered stone prevents settling and cracking. We've seen courts fail in three years on poor clay bases because the foundation wasn't designed for our specific soil and climate conditions.
Most yes. Kennesaw gets significant rain, and clay soil doesn't drain naturally. We design sub-bases with slope and often recommend perimeter drains, especially if your lot drains toward your court or you're in an area like Due West with natural water flow. Proper drainage means your court stays playable year-round and the base stays stable.
We typically recommend 4 to 6 inches of engineered stone base for Kennesaw properties. The clay underneath shifts seasonally, so that stone layer acts as a buffer and allows proper water movement. Shallower bases fail faster in our climate. We'll assess your specific soil condition and drainage to confirm the exact depth your court needs.
Usually, yes. Most Kennesaw residential lots have enough slope and space for a half or full court with minimal grading. We evaluate your topography, existing drainage patterns, and clay composition to confirm. Some properties need minor reshaping to ensure water flows away from the court, but major excavation is rarely necessary.
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