You should pull up and remove weeds by hand as and when they appear. If it is a regular problem, you might need to reseal the paving. In extreme cases, the sub layer itself may need to be re-laid. You can use weed killer, however some paving can be discoloured by stronger weed killers.
Abergorlech
Abergorlech is a village in Carmarthenshire, Wales. It is situated on the banks of the River Cothi, which has the Grade II* listed Pont Cothi bridge running across it.
Abergorlech lies on the boundary of the Brechfa Forest, which has lots of mountain bike trails. The Black Lion, the village pub, greets walkers and bikers. It has a stone floor that is more than 300 years old.
Abergorlech is in the community of Llanfihangel Rhos-y-Corn, which has a population of just 468.
If your house in Abergorlech requires a new [product], you should get a range of quotations from vetted installers to get a good price.