Fill Material

Fill material is any bulk dirt, sand, or crushed rock you use to raise grade, level a low spot, or backfill around a foundation. It's the stuff that goes underneath the finished surface, so it doesn't have to look pretty. What matters is that it packs down and stays put once a machine runs over it.

"Fill" is a job, not a rock type. Fill dirt is the cheapest option and works fine for closing up a big hole or building a pad. Fill sand drains better, so it's the pick around pipes or under a slab where you don't want water sitting. Structural fill is a step up: clean, graded rock placed in lifts and packed to hit an engineer's number, and you'll pay more for it.