Concrete always cracks — the goal is controlling where and how. Utah-specific causes include: shrinkage cracking as the slab cures (controlled by proper w/c ratio, proper ACI 308 curing, and control joint placement per ACI 360 at maximum 2–3 times slab thickness in feet); freeze-thaw cracking from water in existing cracks expanding on freezing (prevented by air-entrained mix and penetrating sealer); settlement cracking from differential subbase movement (prevented by proper compacted aggregate base and removal of expansive clay); and reactive cracking from alkali-silica reactivity (ASR) in certain Utah aggregates. Control joints — saw-cut to one-quarter of slab depth within 4–24 hours of placement, or tooled during finishing — are the primary crack management tool. A 4-inch slab should have control joints no more than 8–12 feet apart in both directions. RainFire Builders lays out every control joint location on the forms before placement begins.