Helpful video reference. Premier Lawns' video "Re-sand a block paved driveway with kiln dried sand" shows the re-sanding process after a clean.
Why the joint sand matters
The sand between block paving joints isn't just cosmetic - it locks the blocks together so they don't shift or rock under weight, and it blocks weed growth in the gaps. High-pressure washing flushes a lot of this sand out of the joints along with the dirt.
What happens if you skip it
Block paving that's been pressure washed but not re-sanded starts moving within a season. Individual blocks can rock, edges lift, and weeds establish quickly in the now-empty joints. A clean-looking driveway on the day can end up needing much more expensive repair work later.
Why kiln-dried sand specifically
Kiln-dried sand is dried to remove moisture, which lets it flow into narrow joints and pack down properly. Damp or ordinary builder's sand clumps and won't fill the gaps the same way, according to paving industry guidance on kiln-dried sand.
How the process works
- Let the paving dry fully after washing - re-sanding into wet joints doesn't work properly.
- Spread kiln-dried sand generously across the surface.
- Brush it into the joints with a stiff broom, working in multiple directions.
- Compact where possible, then repeat brushing and topping up until the joints are properly filled.
This matches the standard process described by Pave Direct's re-sanding guide and the video above.
Why we always include it
Every block paving quote from us includes the kiln-dried re-sand as standard, not as an optional extra - see the pricing page for the full breakdown. Skipping it to save money is a false economy.