Seeding a New Lawn Over Former Paver Base: Remove Sand and Fabric

Proper Soil Prep After Removing Interlocking Pavers

A homeowner removed patio pavers to find: 1" sand, weed barrier, then clay/rock. Asks if they can just mix topsoil into sand (4" total) or must remove everything.

Short Answer: Remove It All

Remove weed fabric, sand, and 6–8" of clay. Replace with screened topsoil.

Why the Sand/Fabric Layer Fails

• Weed barrier prevents root penetration downward
• Sand layer creates drainage discontinuity (perched water table)
• 4" of sand/soil mix over fabric = shallow root zone, drought-prone
• Clay underneath impedes deep rooting

Correct Process

1. Excavate 6–8" total depth
2. Backfill with screened topsoil
3. Tamp lightly
4. Keep top 1–2" loose for seeding
5. Apply quality grass seed + seed starter mulch (e.g., "Grass Seed Aide" at Lowe's)
6. Or: Lay sod for instant lawn (higher cost)

Key Principle

Grass needs 6+ inches of uniform, rootable soil. Shortcuts here guarantee thin, weedy, drought-stressed turf.

Bud Christmann