For those that have cobblestone or brick pathways! Nasty spore growing weeds will bust through cement. Living in the lower Keys of South FL, I've dealt with some very destructive weather. As of now ,I have been pounding sand in between my rebuilt brick pathway. Those nasty weeds that spread my bricks and sea shell garden get a good dose of CHEAP SALT! After a couple days, they pull out easy! Saves on the finger knuckles and expensive weed killer. Also, I heard that cheap WHITE VINEGAR can help rid those weeds. Do not apply any salt next to your living gardening area.
Weeds can easily take hold in the cracks between paving stones. This is a page about keeping weeds from growing between pavers.