Weeds in Paving
Weeds do not grow from below your paving, they grow when seeds fall in to the joints or spaces between the paving blocks.
Properly installed paving will not easily be susceptible to weed growth, however maintenance is necessary to deter weeds. It is important to regularly sweep your paving to prevent seeds from settling.
Should any weeds appear it is advisable to pull them out by the roots before they are fully established.
If weeds persist, spray your paving with an environmentally friendly weed killer.