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.
Garndolbenmaen
Garndolbenmaen, recognized colloquially as Garn, is a village in the region of Gwynedd, Wales. It lies near the A487, about 6 miles north west of Porthmadog, in the community of Dolbenmaen, which has a population of 1,300. The closest villages are Dolbenmaen as well as Bryncir. The Papur Bro, the regional Welsh language paper, is called Y Ffynnon (The Source/Spring). Blaen y Cae tape-recording studios are located in the village, where Pep Le Pew's album, Un tro yn y Gorllewin and the last cd by Gwyneth Glyn, Wyneb Dros Dro, were recorded. The producer and also musician Dyl Mei likewise lives in Garndolbenmaen. Approximately 50 students attend Ysgol Gynradd Garndolbenmaen, lots of students take a trip from neighboring towns including Pant Glas, Bryncir, Cwm Pennant and Golan. The number of pupils going to the school has actually continued to be constant over the past 20 years. A number of the old cottages in Garndolbenmaen have actually been become vacation houses. There is a club in the village, the Cross Foxes (this is currently shut). However at the turn of the 20th century there were numerous bars consisting of the Cross Pipes as well as Dafarn Faig, this was found on the "lôn gefn" (alleyway) resulting in Bryncir. The Gwynedd area councillor for the Dolbenmaen ward, Steve Churchman, a member of the Liberal Democrats, is the postmaster and also he made use of to run a small shop (this is currently closed).