Block paving
How to stop weeds growing through block paving
Weeds popping up between blocks is one of the most common complaints about older block-paved drives. The good news is that most of them aren't pushing up from below — they're growing from seeds and dirt that settle in the joints from above. That means a bit of regular care goes a long way.
Keep the joints full
Jointing sand locks the blocks together and leaves little room for seeds. Over time rain, sweeping and washing wash some of it out. Brushing in fresh kiln-dried sand every so often keeps the joints tight.
Sweep little and often
A stiff brush stops soil, leaves and seeds building up in the joints. It's the single easiest thing you can do.
Go easy with the pressure washer
A powerful jet will blast out the jointing sand along with the dirt. If you pressure wash, re-sand afterwards.
Remove weeds early
Pull or scrape weeds out while they're small, before the roots get established. If you use a weedkiller, choose one suitable for hard surfaces and follow the label carefully.
Consider sealing
A suitable block paving sealant can help bind the jointing sand and make the surface easier to clean. It isn't essential, but some homeowners find it helps.
Start with a good installation
A properly laid drive with a compacted base, tight joints and well-fixed edges is far less prone to weeds and movement. If yours has sunk, rocked or spread, it may be time to look at relaying — see signs your driveway needs replacing.
