Patio pavers and path pavers add a nice touch to the outside landscaping of a home, but placement sometimes can cause a hazard. If they are in shaded areas, a little rain from time to time can result in moss growth on the stones, which is slippery when wet. As a result a morning trip to the mailbox might result in a fall. The best thing to do is to set pavers in an area that gets a lot of sun, but if that isn't possible, there are other ways to alleviate a moss problem.
Cut limbs that are causing shady spots on the pavers, if possible. This will open the area up to more sunlight, which will keep the surface dryer and prevent further growth.
Pressure wash the surface of the pavers to clean and remove current moss growth. This will take care of most of the problem, but little pieces of moss will more than likely still be in between the cracks and rough surfaces of the pavers.
Mix up a half a gallon of water and stir in one cup of salt.
Pour the salt mixture over the pavers using a watering can. Cover the pavers entirely, including the cracks in between the stones. Keep the liquid carefully contained mainly to the patio or stepping stones. Salt kills all vegetation and will ruin nearby plants and grass if you aren't careful.