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.
Llanrwst
Llanrwst is a tiny market community and also neighborhood on the A470 road as well as the River Conwy, in Conwy County Borough, Wales. It established around the woollen trade as well as became known likewise for the making of harps and clocks. Today, less than a mile from the edge of Snowdonia, its primary sector is tourist. Notable structures consist of almshouses, two 17th-century churches, and also the Parish Church of St Grwst, which holds a stone casket of Llywelyn the Great. The 2011 census offered the town a population of 3,323.