What is kiln dried sand?

Kiln dried sand is the fine, moisture-free sand used in block paving to fill the joints between individual blocks. Paving contractors brush or sweep this sand into the gaps once blocks are laid, where it performs two critical functions: it locks the blocks firmly together by filling the space beneath and between them, and it acts as a barrier against weed seeds taking root in the soil underneath.

The "kiln dried" part matters because the sand has been heated in a kiln to remove all moisture. Damp sand can harbor seeds and allow weeds to establish themselves quickly. Dry sand also compacts more effectively and remains stable longer without settling or washing away as readily as ordinary sand.

In block paving driveways, patios, and pathways around Cheltenham, kiln dried sand is the standard choice for this joint-filling role. It works well in both permeable and traditional paving layouts. Once brushed in and the surface is lightly dampened and left to set, the sand hardens slightly and holds the pavers in alignment while the whole structure becomes more rigid.

Quality varies between suppliers and batches, so block paving contractors often source it directly to ensure consistency. Most will include kiln dried sand as a line item in paving quotations, though some may specify it as an optional upgrade for added durability.