Ordering “dirt” for a project sounds simple until you realize there are several kinds, and each one does a different job. Using the wrong material is one of the most common reasons pads settle, driveways crack or lawns struggle.
Fill dirt
Fill is the bulk material used to raise grade or fill low areas. In South Florida it’s usually a sandy material with little organic content, which matters: organic material breaks down over time and leaves voids, and voids mean settling. Good fill can be placed in lifts and compacted to a stable base.
Use it for: raising lot elevation, backfilling, building up areas before pads or paving.
Topsoil
Topsoil is the upper layer that contains organic matter and supports plant growth. It’s what grass and landscaping want to root into. It is not a structural material — it compresses and shifts, so it shouldn’t go under slabs, pads or pavement.
Use it for: the final layer under sod, planting beds and landscaped areas.
Shellrock
Shellrock is a crushed limestone-and-shell material that compacts into a hard, stable surface. It’s widely used in South Florida as a base under driveways, parking areas and slabs, and on its own for temporary roads and equipment pads.
Use it for: road and driveway base, building pads, staging areas and construction entrances.
Getting it right
- Structural areas need compactable, low-organic material, placed and compacted in layers and tested where specs require it.
- Growing areas need topsoil on top — not under anything that has to carry weight.
- Muck or organic soil found on site usually has to be removed before fill goes in.
Moving material in and out
Most sites need some of both: unsuitable soil hauled off and the right material brought in. Handling the import and export of material with the same crew that does the grading keeps quantities and scheduling in one place.
Not sure what your site needs? Send your plans and we’ll price it. Call (954) 955-6512.
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