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.
Caernarfon
Caernarfon is a royal town, community, and port in Gwynedd, Wales, with a population of about 10,000. It is located on the A487 road, around the eastern shore of the Menai Strait, opposite the Isle of Anglesey. Bangor is 8.6 miles (13.8 km) to the north east, whilst Snowdonia borders Caernarfon towards the east and south-east. Carnarvon and Caernarvon are English versions of the name which were superseded in 1926 and 1974, respectively. The villages of Bontnewydd and Caeathro are close by. Rich natural resources around the Menai Straits enabled humans to settle in prehistoric Britain. The Ordovices, a Celtic tribe, lived in the location during the period generally known as Roman Britain. The Roman fort Segontium was established around AD 80 to control the Ordovices during the Roman conquest of Britain. The Romans controlled the region till Roman rule ended in Britain in 382, and after that Caernarfon became part of the Kingdom of Gwynedd. In the late 11th century, William the Conqueror ordered the building of a motte-and-bailey castle at Caernarfon as a part of the Norman invasion of Wales. He was unsuccessful, and Wales remained independent until about 1283. During the thirteenth century, Llywelyn ap Gruffudd, ruler of Gwynedd, refused to pay homage to Edward I of England, prompting the English conquest of Gwynedd. This was followed by the construction of Caernarfon Castle, one of the largest and most imposing fortifications constructed by the English in Wales. The city has developed into an important tourist centre and seat of Gwynedd Council, with a busy harbour and marina. Caernarfon has expanded beyond its medieval walls and experienced heavy suburbanisation. Its population contains the largest percentage of Welsh-speaking citizens anywhere in Wales. The castle and town walls are part of a World Heritage Site described as the Castles and Town Walls of King Edward in Gwynedd. For all your home improvement projects, make sure that you pick reputable pros in Caernarfon to make sure that you get a great quality service at a great price.
