Re-Jointing Block Paving: A Cost-Effective Fix Before You Consider Resurfacing

Updated 15/09/2026 · 4 min read

Re-jointing (often called repointing, borrowing the term from brickwork) is one of the most cost-effective things you can do to an ageing block paving driveway, and it's frequently confused with a full resurface when it's actually a much smaller job.

What re-jointing actually involves

• Removing old, degraded jointing sand from between the blocks, either by hand or with specialist equipment
• Cleaning the joints thoroughly so new material bonds properly rather than sitting on top of old debris
• Filling the joints with fresh kiln-dried sand, or a polymeric jointing compound for longer-lasting results
• Compacting the new joints so they settle correctly rather than washing or blowing out again quickly

Why joints fail over time

Standard kiln-dried sand gradually washes out through rain and gets displaced by regular vehicle movement, especially at pinch points like where wheels turn repeatedly. Once joints are depleted, blocks lose the lateral support that keeps them locked together, which is when individual blocks start to rock, shift or sink slightly under weight.

Signs it's time to re-joint

• Visible gaps between blocks where sand has clearly washed out
• Weeds establishing readily in the joints (see our weed prevention guide)
• Individual blocks that feel slightly loose or move underfoot
• A driveway that's had persistent weed problems despite repeated treatment - often a sign the underlying joint material needs replacing, not just the visible growth

Polymeric sand vs standard kiln-dried sand

Polymeric jointing sand contains a binding agent that sets harder once wet, resisting washout and weed growth far better than standard sand. It costs more upfront but typically lasts considerably longer, making it worth the extra cost on a driveway with a history of joint problems.

Re-jointing vs full resurface

Re-jointing addresses joint failure specifically - it won't fix blocks that have sunk due to sub-base failure, or widespread cracking, which point to a bigger underlying problem (see our resurfacing signs guide). If the blocks themselves and the sub-base beneath them are sound, re-jointing alone can genuinely refresh an ageing driveway at a fraction of the cost of full resurfacing.