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Flagstone is a naturally split, sedimentary stone sold in flat, irregular slabs. Homeowners often use it for walkways, patios, pool decks, and even driveways because the coarse surface adds traction and withstands weather swings. Common varieties include sandstone, slate, and quartzite, each offering its own color palette. You can leave the pieces irregular for a rustic look or cut them into uniform shapes for a cleaner design, giving flagstone plenty of flexibility without sacrificing durability.

Regular upkeep is simple. Sweep away leaves and grit each week, pull any weeds that sprout between stones, and hose down the surface when dust builds up. For oily spills, apply an oil-absorbing product immediately to avoid stains. Re-seal the patio every three to four years with a breathable, matte sealant to guard against weather damage and keep traction high.

Flagstone usually costs more than concrete or brick pavers because it’s a quarried, natural stone that requires extra handling and transport. The higher price buys you distinctive color variations, a non-slip texture, and exceptional longevity—advantages many homeowners find worth the extra expense for high-visibility areas like patios, pool decks, and front walkways.

Sealing is the simplest way to protect flagstone from stains, freeze–thaw cycles, and daily wear. Choose a breathable, matte product that preserves the stone’s texture and keeps the surface from becoming slippery. Plan to clean the patio thoroughly, let it dry, and re-seal every three to four years—or more often around saltwater pools—to keep the color consistent and extend the stone’s life.