Unfortunately, there is no magic block paving system to stop weeds. Remember, up to 90% of weeds in this country are air born. The same applies really to any surface which includes tarmac and slabbing. However, 2 features that we apply to our work helps reduce the impact of weeds on your block paving significantly. The first feature is using permeable weed block to prevent weed growth from underneath. The second feature is using Dansand, which stops weeds from growing in the joints.