Limestone screenings (FDOT Code 21), also known as #21 limestone, are finely crushed limestone particles typically 3/8 inch and smaller that meet Florida Department of Transportation (FDOT) specifications. This graded, highly compactable material is commonly used as a base and leveling layer for pavers, sidewalks, patios, and walkways, and it’s also a reliable choice for smooth grading, backfilling, and finishing work where you need a firm surface that locks in place. With excellent compaction and a clean finished look, FDOT Code 21 screenings provide a stable foundation for both residential and commercial projects.
Common applications for limestone screenings (FDOT Code 21)
- Final leveling under pavers before installation
- Filling joints and tightening up base layers
- Utility trench finishing and clean backfill
- Hardscape repairs where a smooth, compactable material is needed
