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.
Betws-y-coed
Betws-y-coed is a village and community in the Conwy valley in Conwy County District, Wales, located in the historical region of Caernarfonshire, exactly on the boundary with Denbighshire, in the Gwydir Forest. The church, including the town itself and also its prompt area, has a population of 564. An electoral ward of the name Betws-y-Coed also exists. This ward consists of a big additional area including 2 neighbouring communities Capel Curig and also Dolwyddelan as well as has an overall population of 1,244. Betws-y-Coed is one of the honeypot places in Snowdonia. It depends on the Snowdonia National Park, in a valley near the point where the River Conwy is joined by the River Llugwy and also the River Lledr, and also was founded around a monastery in the late sixth century. The village expanded very slowly with the advancement of the local lead mining sector. In 1815, the Waterloo Bridge, developed by Thomas Telford to carry the London to Holyhead road (now the A5) across the River Conwy as well as with the village, brought considerable transport-related advancement. The town became a major mentoring centre in between Corwen (to the east) and Capel Curig (to the west) on the Irish Mail path from London to Holyhead, which led to the renovation of the roadways south to Blaenau Ffestiniog and north to Llanrwst and Conwy. It is a primary destination for the purpose of road indications.