Recurring weed growth in paving joints

Weeds Growing Through Block Paving: Why Jointing Sand Fails

Weeds in block paving do not grow up from the ground. Seed blows in, lands in the joint and germinates in the fine debris that collects there — which is why the same joints weed up year after year no matter how much you spray.

Fix the joint and you fix the weeds.

Block Paving work by Gardenscape in Essex

Why kiln-dried sand stops working

Standard kiln-dried sand is loose by design. Rain, pressure washing and street sweeping steadily pull it out of the top of the joint, leaving a shallow trough that traps organic matter and holds moisture.

Once the joint has dropped a few millimetres, weeds have everything they need.

What we use instead

Polymeric or resin-based jointing compounds set semi-rigid, shed water and leave no open void for seeds. They are not weedproof forever, but growth drops dramatically and any that does appear pulls out easily.

The compound only performs if the joints are cleared to full depth first — filling over old contaminated sand is the usual reason a job fails within a season.

The process on site

We remove all growth and existing sand, clean the paving, allow it to dry, then fill the joints to the correct depth and consolidate. Where blocks have moved, we reset them before jointing.

A sealer can follow once the joints have cured if you want the colour lifted and the surface easier to sweep.

Frequently asked questions

Does pressure washing make weeds worse?

It can. Aggressive washing strips jointing sand out, which deepens the joint and gives seeds somewhere to settle.

Do weedkillers solve it?

They kill what is there but do nothing about the empty joint, so growth returns. Re-jointing is the lasting answer.

Can you re-joint a drive you didn't lay?

Yes — re-sanding and jointing existing paving is a job we do regularly across Essex.

Tired of weeding your driveway?

We clean, reset and re-joint existing block paving so it stays tidy.

Book a paving refresh Call 07535 661664