Cost anchors reference True Star completed-project data (see the Costs asset, n=132 projects, 2025 to 2026); relative cost tiers ($ to $$$$) reflect installed price per square foot at typical patio scale in DFW. Heat, clay behavior, and maintenance characteristics are standard material performance for North Texas conditions as we observe them across our builds. Every surface we install rides on the same engineered base system, excavation, geotextile separation, compacted crushed-limestone lifts, and drainage, because on Blackland Prairie clay, the base decides lifespan more than the surface does. Last field-verified July 19, 2026.