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.
Camborne
Camborne is a town and civil parish in west Cornwall. It forms the western edge of a conurbation consisting of Camborne, Pool and Redruth. Many settlements comprise the civil parish, which include Beacon, Croft Mitchell, Higher Condurrow, Penponds, Roskear Croft, Treswithian Downs and Troon. The town was one of the richest tin mining areas in the world for the duration of the 18th and 19th centuries, which dramatically transformed the town and its landscape. The opening of Dolcoath Mine in 1860, referred to as the 'Queen of Cornish Mines', went as deep as 3500 feet, which was one of the world's deepest and oldest mines until closing in 1921. Camborne was also home to the last operating tin mine in Europe, South Crofty, until its closure in 1998. The population in 2011 was recorded as having increased to 20845, being a part of the largest conurbation in Cornwall. A large urban renewal programme is presently taking place in the town by CPR Regeneration, one of the government's Urban Regeneration companies. This involves driving the re-development of the previous industrial land, and attracting and supporting local firms to assist them to create sustainable jobs to enhance employment possibilities in the town for its inhabitants. It has also been involved in the development of sites and important projects, including the east-west link road between Redruth and Camborne. For all your house upgrades, make certain that you utilise trustworthy specialists in Camborne to ensure you get the very best quality.